diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9d7134b97..74a7f8cff 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -39,6 +39,7 @@ set(SOURCE_FILES
         common/WindowDescriptors.cpp
         common/WindowDescriptors.hpp
 
+        common/enums/MessageContext.hpp
         common/enums/MessageOverflow.hpp
 
         common/network/NetworkCommon.cpp
@@ -281,6 +282,9 @@ set(SOURCE_FILES
         messages/MessageElement.cpp
         messages/MessageElement.hpp
         messages/MessageFlag.hpp
+        messages/MessageSimilarity.cpp
+        messages/MessageSimilarity.hpp
+        messages/MessageSink.hpp
         messages/MessageThread.cpp
         messages/MessageThread.hpp
 
@@ -526,6 +530,8 @@ set(SOURCE_FILES
         util/Twitch.hpp
         util/TypeName.hpp
         util/Variant.hpp
+        util/VectorMessageSink.cpp
+        util/VectorMessageSink.hpp
         util/WidgetHelpers.cpp
         util/WidgetHelpers.hpp
         util/WindowsHelper.cpp
diff --git a/src/common/Channel.cpp b/src/common/Channel.cpp
index ef778bad1..18f55c02b 100644
--- a/src/common/Channel.cpp
+++ b/src/common/Channel.cpp
@@ -3,7 +3,9 @@
 #include "Application.hpp"
 #include "messages/Message.hpp"
 #include "messages/MessageBuilder.hpp"
+#include "messages/MessageSimilarity.hpp"
 #include "providers/twitch/IrcMessageHandler.hpp"
+#include "providers/twitch/TwitchIrcServer.hpp"
 #include "singletons/Emotes.hpp"
 #include "singletons/Logging.hpp"
 #include "singletons/Settings.hpp"
@@ -121,10 +123,10 @@ void Channel::addSystemMessage(const QString &contents)
     this->addMessage(msg, MessageContext::Original);
 }
 
-void Channel::addOrReplaceTimeout(MessagePtr message)
+void Channel::addOrReplaceTimeout(MessagePtr message, QTime now)
 {
     addOrReplaceChannelTimeout(
-        this->getMessageSnapshot(), std::move(message), QTime::currentTime(),
+        this->getMessageSnapshot(), std::move(message), now,
         [this](auto /*idx*/, auto msg, auto replacement) {
             this->replaceMessage(msg, replacement);
         },
@@ -287,10 +289,15 @@ void Channel::clearMessages()
 }
 
 MessagePtr Channel::findMessage(QString messageID)
+{
+    return this->findMessageByID(messageID);
+}
+
+MessagePtr Channel::findMessageByID(QStringView messageID)
 {
     MessagePtr res;
 
-    if (auto msg = this->messages_.rfind([&messageID](const MessagePtr &msg) {
+    if (auto msg = this->messages_.rfind([messageID](const MessagePtr &msg) {
             return msg->id == messageID;
         });
         msg)
@@ -301,6 +308,19 @@ MessagePtr Channel::findMessage(QString messageID)
     return res;
 }
 
+void Channel::applySimilarityFilters(const MessagePtr &message) const
+{
+    setSimilarityFlags(message, this->messages_.getSnapshot());
+}
+
+MessageSinkTraits Channel::sinkTraits() const
+{
+    return {
+        MessageSinkTrait::AddMentionsToGlobalChannel,
+        MessageSinkTrait::RequiresKnownChannelPointReward,
+    };
+}
+
 bool Channel::canSendMessage() const
 {
     return false;
diff --git a/src/common/Channel.hpp b/src/common/Channel.hpp
index ac90573ff..86037e6c8 100644
--- a/src/common/Channel.hpp
+++ b/src/common/Channel.hpp
@@ -1,8 +1,10 @@
 #pragma once
 
+#include "common/enums/MessageContext.hpp"
 #include "controllers/completion/TabCompletionModel.hpp"
 #include "messages/LimitedQueue.hpp"
 #include "messages/MessageFlag.hpp"
+#include "messages/MessageSink.hpp"
 
 #include <magic_enum/magic_enum.hpp>
 #include <pajlada/signals/signal.hpp>
@@ -26,15 +28,7 @@ enum class TimeoutStackStyle : int {
     Default = DontStackBeyondUserMessage,
 };
 
-/// Context of the message being added to a channel
-enum class MessageContext {
-    /// This message is the original
-    Original,
-    /// This message is a repost of a message that has already been added in a channel
-    Repost,
-};
-
-class Channel : public std::enable_shared_from_this<Channel>
+class Channel : public std::enable_shared_from_this<Channel>, public MessageSink
 {
 public:
     // This is for Lua. See scripts/make_luals_meta.py
@@ -55,7 +49,7 @@ public:
     };
 
     explicit Channel(const QString &name, Type type);
-    virtual ~Channel();
+    ~Channel() override;
 
     // SIGNALS
     pajlada::Signals::Signal<const QString &, const QString &, bool &>
@@ -85,8 +79,9 @@ public:
     // overridingFlags can be filled in with flags that should be used instead
     // of the message's flags. This is useful in case a flag is specific to a
     // type of split
-    void addMessage(MessagePtr message, MessageContext context,
-                    std::optional<MessageFlags> overridingFlags = std::nullopt);
+    void addMessage(
+        MessagePtr message, MessageContext context,
+        std::optional<MessageFlags> overridingFlags = std::nullopt) final;
     void addMessagesAtStart(const std::vector<MessagePtr> &messages_);
 
     void addSystemMessage(const QString &contents);
@@ -94,8 +89,8 @@ public:
     /// Inserts the given messages in order by Message::serverReceivedTime.
     void fillInMissingMessages(const std::vector<MessagePtr> &messages);
 
-    void addOrReplaceTimeout(MessagePtr message);
-    void disableAllMessages();
+    void addOrReplaceTimeout(MessagePtr message, QTime now) final;
+    void disableAllMessages() final;
     void replaceMessage(MessagePtr message, MessagePtr replacement);
     void replaceMessage(size_t index, MessagePtr replacement);
     void deleteMessage(QString messageID);
@@ -104,9 +99,14 @@ public:
     void clearMessages();
 
     MessagePtr findMessage(QString messageID);
+    MessagePtr findMessageByID(QStringView messageID) final;
 
     bool hasMessages() const;
 
+    void applySimilarityFilters(const MessagePtr &message) const final;
+
+    MessageSinkTraits sinkTraits() const final;
+
     // CHANNEL INFO
     virtual bool canSendMessage() const;
     virtual bool isWritable() const;  // whether split input will be usable
diff --git a/src/common/enums/MessageContext.hpp b/src/common/enums/MessageContext.hpp
new file mode 100644
index 000000000..669e55315
--- /dev/null
+++ b/src/common/enums/MessageContext.hpp
@@ -0,0 +1,13 @@
+#pragma once
+
+namespace chatterino {
+
+/// Context of the message being added to a channel
+enum class MessageContext {
+    /// This message is the original
+    Original,
+    /// This message is a repost of a message that has already been added in a channel
+    Repost,
+};
+
+}  // namespace chatterino
diff --git a/src/messages/MessageSimilarity.cpp b/src/messages/MessageSimilarity.cpp
new file mode 100644
index 000000000..3019aea67
--- /dev/null
+++ b/src/messages/MessageSimilarity.cpp
@@ -0,0 +1,51 @@
+#include "messages/MessageSimilarity.hpp"
+
+#include <algorithm>
+#include <vector>
+
+namespace chatterino::similarity::detail {
+
+float relativeSimilarity(QStringView str1, QStringView str2)
+{
+    using SizeType = QStringView::size_type;
+
+    // Longest Common Substring Problem
+    std::vector<std::vector<int>> tree(str1.size(),
+                                       std::vector<int>(str2.size(), 0));
+    int z = 0;
+
+    for (SizeType i = 0; i < str1.size(); ++i)
+    {
+        for (SizeType j = 0; j < str2.size(); ++j)
+        {
+            if (str1[i] == str2[j])
+            {
+                if (i == 0 || j == 0)
+                {
+                    tree[i][j] = 1;
+                }
+                else
+                {
+                    tree[i][j] = tree[i - 1][j - 1] + 1;
+                }
+                z = std::max(tree[i][j], z);
+            }
+            else
+            {
+                tree[i][j] = 0;
+            }
+        }
+    }
+
+    // ensure that no div by 0
+    if (z == 0)
+    {
+        return 0.F;
+    }
+
+    auto div = std::max<>({static_cast<SizeType>(1), str1.size(), str2.size()});
+
+    return float(z) / float(div);
+}
+
+}  // namespace chatterino::similarity::detail
diff --git a/src/messages/MessageSimilarity.hpp b/src/messages/MessageSimilarity.hpp
new file mode 100644
index 000000000..562e574ad
--- /dev/null
+++ b/src/messages/MessageSimilarity.hpp
@@ -0,0 +1,73 @@
+#pragma once
+
+#include "Application.hpp"
+#include "controllers/accounts/AccountController.hpp"
+#include "messages/Message.hpp"
+#include "providers/twitch/TwitchAccount.hpp"
+#include "singletons/Settings.hpp"
+
+#include <ranges>
+
+namespace chatterino::similarity::detail {
+
+float relativeSimilarity(QStringView str1, QStringView str2);
+
+float inMessages(const MessagePtr &msg,
+                 const std::ranges::bidirectional_range auto &messages)
+{
+    float similarityPercent = 0.0F;
+
+    for (const auto &prevMsg :
+         messages | std::views::reverse |
+             std::views::take(getSettings()->hideSimilarMaxMessagesToCheck))
+    {
+        if (prevMsg->parseTime.secsTo(QTime::currentTime()) >=
+            getSettings()->hideSimilarMaxDelay)
+        {
+            break;
+        }
+        if (getSettings()->hideSimilarBySameUser &&
+            msg->loginName != prevMsg->loginName)
+        {
+            continue;
+        }
+        similarityPercent = std::max(
+            similarityPercent,
+            relativeSimilarity(msg->messageText, prevMsg->messageText));
+    }
+
+    return similarityPercent;
+}
+
+}  // namespace chatterino::similarity::detail
+
+namespace chatterino {
+
+void setSimilarityFlags(const MessagePtr &message,
+                        const std::ranges::bidirectional_range auto &messages)
+{
+    if (getSettings()->similarityEnabled)
+    {
+        bool isMyself =
+            message->loginName ==
+            getApp()->getAccounts()->twitch.getCurrent()->getUserName();
+        bool hideMyself = getSettings()->hideSimilarMyself;
+
+        if (isMyself && !hideMyself)
+        {
+            return;
+        }
+
+        if (similarity::detail::inMessages(message, messages) >
+            getSettings()->similarityPercentage)
+        {
+            message->flags.set(MessageFlag::Similar);
+            if (getSettings()->colorSimilarDisabled)
+            {
+                message->flags.set(MessageFlag::Disabled);
+            }
+        }
+    }
+}
+
+}  // namespace chatterino
diff --git a/src/messages/MessageSink.hpp b/src/messages/MessageSink.hpp
new file mode 100644
index 000000000..07e7101a5
--- /dev/null
+++ b/src/messages/MessageSink.hpp
@@ -0,0 +1,58 @@
+#pragma once
+
+#include "common/enums/MessageContext.hpp"
+#include "messages/MessageFlag.hpp"
+
+#include <memory>
+
+class QStringView;
+class QTime;
+
+namespace chatterino {
+
+struct Message;
+using MessagePtr = std::shared_ptr<const Message>;
+
+enum class MessageSinkTrait : uint8_t {
+    None = 0,
+    AddMentionsToGlobalChannel = 1 << 0,
+    RequiresKnownChannelPointReward = 1 << 1,
+};
+using MessageSinkTraits = FlagsEnum<MessageSinkTrait>;
+
+/// A generic interface for a managed buffer of `Message`s
+class MessageSink
+{
+public:
+    virtual ~MessageSink() = default;
+
+    /// Add a message to this sink
+    ///
+    /// @param message The message to add (non-null)
+    /// @param ctx The context in which this message is being added.
+    /// @param overridingFlags
+    virtual void addMessage(
+        MessagePtr message, MessageContext ctx,
+        std::optional<MessageFlags> overridingFlags = std::nullopt) = 0;
+
+    /// Adds a timeout message or merges it into an existing one
+    virtual void addOrReplaceTimeout(MessagePtr clearchatMessage,
+                                     QTime now) = 0;
+
+    /// Flags all messages as `Disabled`
+    virtual void disableAllMessages() = 0;
+
+    /// Searches for similar messages and flags this message as similar
+    /// (based on the current settings).
+    virtual void applySimilarityFilters(const MessagePtr &message) const = 0;
+
+    /// @brief Searches for a message by an ID
+    ///
+    /// If there is no message found, an empty shared-pointer is returned.
+    virtual MessagePtr findMessageByID(QStringView id) = 0;
+
+    ///
+    virtual MessageSinkTraits sinkTraits() const = 0;
+};
+
+}  // namespace chatterino
diff --git a/src/providers/recentmessages/Impl.cpp b/src/providers/recentmessages/Impl.cpp
index 410a34aac..4605204eb 100644
--- a/src/providers/recentmessages/Impl.cpp
+++ b/src/providers/recentmessages/Impl.cpp
@@ -3,7 +3,9 @@
 #include "common/Env.hpp"
 #include "messages/MessageBuilder.hpp"
 #include "providers/twitch/IrcMessageHandler.hpp"
+#include "providers/twitch/TwitchChannel.hpp"
 #include "util/Helpers.hpp"
+#include "util/VectorMessageSink.hpp"
 
 #include <QJsonArray>
 #include <QUrlQuery>
@@ -40,7 +42,13 @@ std::vector<Communi::IrcMessage *> parseRecentMessages(
 std::vector<MessagePtr> buildRecentMessages(
     std::vector<Communi::IrcMessage *> &messages, Channel *channel)
 {
-    std::vector<MessagePtr> allBuiltMessages;
+    VectorMessageSink sink({}, MessageFlag::RecentMessage);
+
+    auto *twitchChannel = dynamic_cast<TwitchChannel *>(channel);
+    if (!twitchChannel)
+    {
+        return {};
+    }
 
     for (auto *message : messages)
     {
@@ -58,24 +66,16 @@ std::vector<MessagePtr> buildRecentMessages(
                 auto msg = makeSystemMessage(
                     QLocale().toString(msgDate, QLocale::LongFormat),
                     QTime(0, 0));
-                msg->flags.set(MessageFlag::RecentMessage);
-                allBuiltMessages.emplace_back(msg);
+                sink.addMessage(msg, MessageContext::Original);
             }
         }
 
-        auto builtMessages = IrcMessageHandler::parseMessageWithReply(
-            channel, message, allBuiltMessages);
-
-        for (const auto &builtMessage : builtMessages)
-        {
-            builtMessage->flags.set(MessageFlag::RecentMessage);
-            allBuiltMessages.emplace_back(builtMessage);
-        }
+        IrcMessageHandler::parseMessageInto(message, sink, twitchChannel);
 
         message->deleteLater();
     }
 
-    return allBuiltMessages;
+    return std::move(sink).takeMessages();
 }
 
 // Returns the URL to be used for querying the Recent Messages API for the
diff --git a/src/providers/twitch/IrcMessageHandler.cpp b/src/providers/twitch/IrcMessageHandler.cpp
index 0c345da83..9a230bf9b 100644
--- a/src/providers/twitch/IrcMessageHandler.cpp
+++ b/src/providers/twitch/IrcMessageHandler.cpp
@@ -7,24 +7,21 @@
 #include "common/QLogging.hpp"
 #include "controllers/accounts/AccountController.hpp"
 #include "controllers/ignores/IgnoreController.hpp"
-#include "messages/LimitedQueue.hpp"
 #include "messages/Link.hpp"
 #include "messages/Message.hpp"
 #include "messages/MessageBuilder.hpp"
 #include "messages/MessageColor.hpp"
 #include "messages/MessageElement.hpp"
+#include "messages/MessageSink.hpp"
 #include "messages/MessageThread.hpp"
-#include "providers/twitch/ChannelPointReward.hpp"
 #include "providers/twitch/TwitchAccount.hpp"
 #include "providers/twitch/TwitchAccountManager.hpp"
 #include "providers/twitch/TwitchChannel.hpp"
 #include "providers/twitch/TwitchHelpers.hpp"
 #include "providers/twitch/TwitchIrcServer.hpp"
-#include "singletons/Resources.hpp"
 #include "singletons/Settings.hpp"
 #include "singletons/StreamerMode.hpp"
 #include "singletons/WindowManager.hpp"
-#include "util/ChannelHelpers.hpp"
 #include "util/FormatTime.hpp"
 #include "util/Helpers.hpp"
 #include "util/IrcHelpers.hpp"
@@ -34,7 +31,6 @@
 #include <QStringBuilder>
 
 #include <memory>
-#include <unordered_set>
 
 using namespace chatterino::literals;
 
@@ -165,50 +161,6 @@ ChannelPtr channelOrEmptyByTarget(const QString &target,
     return server.getChannelOrEmpty(channelName);
 }
 
-float relativeSimilarity(const QString &str1, const QString &str2)
-{
-    // Longest Common Substring Problem
-    std::vector<std::vector<int>> tree(str1.size(),
-                                       std::vector<int>(str2.size(), 0));
-    int z = 0;
-
-    for (int i = 0; i < str1.size(); ++i)
-    {
-        for (int j = 0; j < str2.size(); ++j)
-        {
-            if (str1[i] == str2[j])
-            {
-                if (i == 0 || j == 0)
-                {
-                    tree[i][j] = 1;
-                }
-                else
-                {
-                    tree[i][j] = tree[i - 1][j - 1] + 1;
-                }
-                if (tree[i][j] > z)
-                {
-                    z = tree[i][j];
-                }
-            }
-            else
-            {
-                tree[i][j] = 0;
-            }
-        }
-    }
-
-    // ensure that no div by 0
-    if (z == 0)
-    {
-        return 0.F;
-    }
-
-    auto div = std::max<int>(1, std::max(str1.size(), str2.size()));
-
-    return float(z) / float(div);
-}
-
 QMap<QString, QString> parseBadges(const QString &badgesString)
 {
     QMap<QString, QString> badges;
@@ -232,106 +184,6 @@ struct ReplyContext {
     MessagePtr parent;
 };
 
-[[nodiscard]] ReplyContext getReplyContext(
-    TwitchChannel *channel, Communi::IrcMessage *message,
-    const std::vector<MessagePtr> &otherLoaded)
-{
-    ReplyContext ctx;
-
-    const auto &tags = message->tags();
-    if (const auto it = tags.find("reply-thread-parent-msg-id");
-        it != tags.end())
-    {
-        const QString replyID = it.value().toString();
-        auto threadIt = channel->threads().find(replyID);
-        std::shared_ptr<MessageThread> rootThread;
-        if (threadIt != channel->threads().end())
-        {
-            auto owned = threadIt->second.lock();
-            if (owned)
-            {
-                // Thread already exists (has a reply)
-                checkThreadSubscription(tags, message->nick(), owned);
-                ctx.thread = owned;
-                rootThread = owned;
-            }
-        }
-
-        if (!rootThread)
-        {
-            MessagePtr foundMessage;
-
-            // Thread does not yet exist, find root reply and create thread.
-            // Linear search is justified by the infrequent use of replies
-            for (const auto &otherMsg : otherLoaded)
-            {
-                if (otherMsg->id == replyID)
-                {
-                    // Found root reply message
-                    foundMessage = otherMsg;
-                    break;
-                }
-            }
-
-            if (!foundMessage)
-            {
-                // We didn't find the reply root message in the otherLoaded messages
-                // which are typically the already-parsed recent messages from the
-                // Recent Messages API. We could have a really old message that
-                // still exists being replied to, so check for that here.
-                foundMessage = channel->findMessage(replyID);
-            }
-
-            if (foundMessage)
-            {
-                std::shared_ptr<MessageThread> newThread =
-                    std::make_shared<MessageThread>(foundMessage);
-                checkThreadSubscription(tags, message->nick(), newThread);
-
-                ctx.thread = newThread;
-                rootThread = newThread;
-                // Store weak reference to thread in channel
-                channel->addReplyThread(newThread);
-            }
-        }
-
-        if (const auto parentIt = tags.find("reply-parent-msg-id");
-            parentIt != tags.end())
-        {
-            const QString parentID = parentIt.value().toString();
-            if (replyID == parentID)
-            {
-                if (rootThread)
-                {
-                    ctx.parent = rootThread->root();
-                }
-            }
-            else
-            {
-                auto parentThreadIt = channel->threads().find(parentID);
-                if (parentThreadIt != channel->threads().end())
-                {
-                    auto thread = parentThreadIt->second.lock();
-                    if (thread)
-                    {
-                        ctx.parent = thread->root();
-                    }
-                }
-                else
-                {
-                    auto parent = channel->findMessage(parentID);
-                    if (parent)
-                    {
-                        ctx.parent = parent;
-                    }
-                }
-            }
-        }
-    }
-
-    return ctx;
-}
-
 std::optional<ClearChatMessage> parseClearChatMessage(
     Communi::IrcMessage *message)
 {
@@ -370,9 +222,9 @@ std::optional<ClearChatMessage> parseClearChatMessage(
 }
 
 /**
- * Parse a single IRC NOTICE message into 0 or more Chatterino messages
+ * Parse a single IRC NOTICE message into a Chatterino message
  **/
-std::vector<MessagePtr> parseNoticeMessage(Communi::IrcNoticeMessage *message)
+MessagePtr parseNoticeMessage(Communi::IrcNoticeMessage *message)
 {
     assert(message != nullptr);
 
@@ -400,7 +252,7 @@ std::vector<MessagePtr> parseNoticeMessage(Communi::IrcNoticeMessage *message)
                                   linkColor)
             ->setLink(accountsLink);
 
-        return {builder.release()};
+        return builder.release();
     }
 
     if (message->content().startsWith("You are permanently banned "))
@@ -410,256 +262,19 @@ std::vector<MessagePtr> parseNoticeMessage(Communi::IrcNoticeMessage *message)
 
     if (message->tags().value("msg-id") == "msg_timedout")
     {
-        std::vector<MessagePtr> builtMessage;
-
         QString remainingTime =
             formatTime(message->content().split(" ").value(5));
         QString formattedMessage =
             QString("You are timed out for %1.")
                 .arg(remainingTime.isEmpty() ? "0s" : remainingTime);
 
-        builtMessage.emplace_back(makeSystemMessage(
-            formattedMessage, calculateMessageTime(message).time()));
-
-        return builtMessage;
+        return makeSystemMessage(formattedMessage,
+                                 calculateMessageTime(message).time());
     }
 
     // default case
-    std::vector<MessagePtr> builtMessages;
-
-    builtMessages.emplace_back(makeSystemMessage(
-        message->content(), calculateMessageTime(message).time()));
-
-    return builtMessages;
-}
-
-/**
- * Parse a single IRC USERNOTICE message into 0 or more Chatterino messages
- **/
-std::vector<MessagePtr> parseUserNoticeMessage(Channel *channel,
-                                               Communi::IrcMessage *message)
-{
-    assert(channel != nullptr);
-    assert(message != nullptr);
-
-    std::vector<MessagePtr> builtMessages;
-
-    auto tags = message->tags();
-    auto parameters = message->parameters();
-
-    QString msgType = tags.value("msg-id").toString();
-    bool mirrored = msgType == "sharedchatnotice";
-    if (mirrored)
-    {
-        msgType = tags.value("source-msg-id").toString();
-    }
-    else
-    {
-        auto rIt = tags.find("room-id");
-        auto sIt = tags.find("source-room-id");
-        if (rIt != tags.end() && sIt != tags.end())
-        {
-            mirrored = rIt.value().toString() != sIt.value().toString();
-        }
-    }
-
-    if (mirrored && msgType != "announcement")
-    {
-        // avoid confusing broadcasters with user payments to other channels
-        return {};
-    }
-
-    QString content;
-    if (parameters.size() >= 2)
-    {
-        content = parameters[1];
-    }
-
-    if (isIgnoredMessage({
-            .message = content,
-            .twitchUserID = tags.value("user-id").toString(),
-            .isMod = channel->isMod(),
-            .isBroadcaster = channel->isBroadcaster(),
-        }))
-    {
-        return {};
-    }
-
-    if (SPECIAL_MESSAGE_TYPES.contains(msgType))
-    {
-        // Messages are not required, so they might be empty
-        if (!content.isEmpty())
-        {
-            MessageParseArgs args;
-            args.trimSubscriberUsername = true;
-            args.allowIgnore = false;
-
-            auto [built, highlight] = MessageBuilder::makeIrcMessage(
-                channel, message, args, content, 0);
-            if (built)
-            {
-                built->flags.set(MessageFlag::Subscription);
-                built->flags.unset(MessageFlag::Highlighted);
-                if (mirrored)
-                {
-                    built->flags.set(MessageFlag::SharedMessage);
-                }
-                builtMessages.emplace_back(std::move(built));
-            }
-        }
-    }
-
-    auto it = tags.find("system-msg");
-
-    if (it != tags.end())
-    {
-        // By default, we return value of system-msg tag
-        QString messageText = it.value().toString();
-
-        if (msgType == "bitsbadgetier")
-        {
-            messageText =
-                QString("%1 just earned a new %2 Bits badge!")
-                    .arg(tags.value("display-name").toString(),
-                         kFormatNumbers(
-                             tags.value("msg-param-threshold").toInt()));
-        }
-        else if (msgType == "announcement")
-        {
-            messageText = "Announcement";
-        }
-        else if (msgType == "raid")
-        {
-            auto login = tags.value("login").toString();
-            auto displayName = tags.value("msg-param-displayName").toString();
-
-            if (!login.isEmpty() && !displayName.isEmpty())
-            {
-                MessageColor color = MessageColor::System;
-                if (auto colorTag = tags.value("color").value<QColor>();
-                    colorTag.isValid())
-                {
-                    color = MessageColor(colorTag);
-                }
-
-                auto b = MessageBuilder(
-                    raidEntryMessage, parseTagString(messageText), login,
-                    displayName, color, calculateMessageTime(message).time());
-
-                b->flags.set(MessageFlag::Subscription);
-                if (mirrored)
-                {
-                    b->flags.set(MessageFlag::SharedMessage);
-                }
-
-                auto newMessage = b.release();
-                builtMessages.emplace_back(newMessage);
-                return builtMessages;
-            }
-        }
-        else if (msgType == "subgift")
-        {
-            if (auto monthsIt = tags.find("msg-param-gift-months");
-                monthsIt != tags.end())
-            {
-                int months = monthsIt.value().toInt();
-                if (months > 1)
-                {
-                    auto plan = tags.value("msg-param-sub-plan").toString();
-                    QString name =
-                        ANONYMOUS_GIFTER_ID == tags.value("user-id").toString()
-                            ? "An anonymous user"
-                            : tags.value("display-name").toString();
-                    messageText =
-                        QString("%1 gifted %2 months of a Tier %3 sub to %4!")
-                            .arg(name, QString::number(months),
-                                 plan.isEmpty() ? '1' : plan.at(0),
-                                 tags.value("msg-param-recipient-display-name")
-                                     .toString());
-
-                    if (auto countIt = tags.find("msg-param-sender-count");
-                        countIt != tags.end())
-                    {
-                        int count = countIt.value().toInt();
-                        if (count > months)
-                        {
-                            messageText +=
-                                QString(
-                                    " They've gifted %1 months in the channel.")
-                                    .arg(QString::number(count));
-                        }
-                    }
-                }
-            }
-        }
-        else if (msgType == "sub" || msgType == "resub")
-        {
-            if (auto tenure = tags.find("msg-param-multimonth-tenure");
-                tenure != tags.end() && tenure.value().toInt() == 0)
-            {
-                int months =
-                    tags.value("msg-param-multimonth-duration").toInt();
-                if (months > 1)
-                {
-                    int tier = tags.value("msg-param-sub-plan").toInt() / 1000;
-                    messageText =
-                        QString(
-                            "%1 subscribed at Tier %2 for %3 months in advance")
-                            .arg(tags.value("display-name").toString(),
-                                 QString::number(tier),
-                                 QString::number(months));
-                    if (msgType == "resub")
-                    {
-                        int cumulative =
-                            tags.value("msg-param-cumulative-months").toInt();
-                        messageText +=
-                            QString(", reaching %1 months cumulatively so far!")
-                                .arg(QString::number(cumulative));
-                    }
-                    else
-                    {
-                        messageText += "!";
-                    }
-                }
-            }
-        }
-
-        auto b = MessageBuilder(systemMessage, parseTagString(messageText),
-                                calculateMessageTime(message).time());
-        b->flags.set(MessageFlag::Subscription);
-        if (mirrored)
-        {
-            b->flags.set(MessageFlag::SharedMessage);
-        }
-
-        auto newMessage = b.release();
-        builtMessages.emplace_back(newMessage);
-    }
-
-    return builtMessages;
-}
-
-/**
- * Parse a single IRC PRIVMSG into 0-1 Chatterino messages
- */
-std::vector<MessagePtr> parsePrivMessage(Channel *channel,
-                                         Communi::IrcPrivateMessage *message)
-{
-    assert(channel != nullptr);
-    assert(message != nullptr);
-
-    std::vector<MessagePtr> builtMessages;
-    MessageParseArgs args;
-    args.isAction = message->isAction();
-    auto [built, alert] = MessageBuilder::makeIrcMessage(channel, message, args,
-                                                         message->content(), 0);
-    if (built)
-    {
-        builtMessages.emplace_back(std::move(built));
-        MessageBuilder::triggerHighlights(channel, alert);
-    }
-
-    return builtMessages;
+    return makeSystemMessage(message->content(),
+                             calculateMessageTime(message).time());
 }
 
 }  // namespace
@@ -674,65 +289,27 @@ IrcMessageHandler &IrcMessageHandler::instance()
     return instance;
 }
 
-std::vector<MessagePtr> IrcMessageHandler::parseMessageWithReply(
-    Channel *channel, Communi::IrcMessage *message,
-    std::vector<MessagePtr> &otherLoaded)
+void IrcMessageHandler::parseMessageInto(Communi::IrcMessage *message,
+                                         MessageSink &sink,
+                                         TwitchChannel *channel)
 {
-    std::vector<MessagePtr> builtMessages;
-
     auto command = message->command();
 
     if (command == u"PRIVMSG"_s)
     {
-        auto *privMsg = dynamic_cast<Communi::IrcPrivateMessage *>(message);
-        auto *tc = dynamic_cast<TwitchChannel *>(channel);
-        if (!tc)
-        {
-            return parsePrivMessage(channel, privMsg);
-        }
-
-        QString content = privMsg->content();
-        int messageOffset = stripLeadingReplyMention(privMsg->tags(), content);
-        MessageParseArgs args;
-        auto tags = privMsg->tags();
-        if (const auto it = tags.find("custom-reward-id"); it != tags.end())
-        {
-            args.channelPointRewardId = it.value().toString();
-        }
-        args.isAction = privMsg->isAction();
-
-        auto replyCtx = getReplyContext(tc, message, otherLoaded);
-        auto [built, alert] = MessageBuilder::makeIrcMessage(
-            channel, message, args, content, messageOffset, replyCtx.thread,
-            replyCtx.parent);
-
-        if (built)
-        {
-            builtMessages.emplace_back(built);
-            MessageBuilder::triggerHighlights(channel, alert);
-        }
-
-        if (message->tags().contains(u"pinned-chat-paid-amount"_s))
-        {
-            auto ptr = MessageBuilder::buildHypeChatMessage(privMsg);
-            if (ptr)
-            {
-                builtMessages.emplace_back(std::move(ptr));
-            }
-        }
-
-        return builtMessages;
+        parsePrivMessageInto(
+            dynamic_cast<Communi::IrcPrivateMessage *>(message), sink, channel);
     }
-
-    if (command == u"USERNOTICE"_s)
+    else if (command == u"USERNOTICE"_s)
     {
-        return parseUserNoticeMessage(channel, message);
+        parseUserNoticeMessageInto(message, sink, channel);
     }
 
     if (command == u"NOTICE"_s)
     {
-        return parseNoticeMessage(
-            dynamic_cast<Communi::IrcNoticeMessage *>(message));
+        sink.addMessage(parseNoticeMessage(
+                            dynamic_cast<Communi::IrcNoticeMessage *>(message)),
+                        MessageContext::Original);
     }
 
     if (command == u"CLEARCHAT"_s)
@@ -740,32 +317,20 @@ std::vector<MessagePtr> IrcMessageHandler::parseMessageWithReply(
         auto cc = parseClearChatMessage(message);
         if (!cc)
         {
-            return builtMessages;
+            return;
         }
         auto &clearChat = *cc;
         if (clearChat.disableAllMessages)
         {
-            builtMessages.emplace_back(std::move(clearChat.message));
+            sink.addMessage(std::move(clearChat.message),
+                            MessageContext::Original);
         }
         else
         {
-            addOrReplaceChannelTimeout(
-                otherLoaded, std::move(clearChat.message),
-                calculateMessageTime(message).time(),
-                [&](auto idx, auto /*msg*/, auto &&replacement) {
-                    replacement->flags.set(MessageFlag::RecentMessage);
-                    otherLoaded[idx] = replacement;
-                },
-                [&](auto &&msg) {
-                    builtMessages.emplace_back(msg);
-                },
-                false);
+            sink.addOrReplaceTimeout(std::move(clearChat.message),
+                                     calculateMessageTime(message).time());
         }
-
-        return builtMessages;
     }
-
-    return builtMessages;
 }
 
 void IrcMessageHandler::handlePrivMessage(Communi::IrcPrivateMessage *message,
@@ -778,32 +343,41 @@ void IrcMessageHandler::handlePrivMessage(Communi::IrcPrivateMessage *message,
     }
 
     auto *twitchChannel = dynamic_cast<TwitchChannel *>(chan.get());
-
-    if (twitchChannel != nullptr)
+    if (!twitchChannel)
     {
-        auto currentUser = getApp()->getAccounts()->twitch.getCurrent();
-        if (message->tag("user-id") == currentUser->getUserId())
+        return;
+    }
+
+    parsePrivMessageInto(message, *twitchChannel, twitchChannel);
+}
+
+void IrcMessageHandler::parsePrivMessageInto(
+    Communi::IrcPrivateMessage *message, MessageSink &sink,
+    TwitchChannel *channel)
+{
+    auto currentUser = getApp()->getAccounts()->twitch.getCurrent();
+    if (message->tag("user-id") == currentUser->getUserId())
+    {
+        auto badgesTag = message->tag("badges");
+        if (badgesTag.isValid())
         {
-            auto badgesTag = message->tag("badges");
-            if (badgesTag.isValid())
-            {
-                auto parsedBadges = parseBadges(badgesTag.toString());
-                twitchChannel->setMod(parsedBadges.contains("moderator"));
-                twitchChannel->setVIP(parsedBadges.contains("vip"));
-                twitchChannel->setStaff(parsedBadges.contains("staff"));
-            }
+            auto parsedBadges = parseBadges(badgesTag.toString());
+            channel->setMod(parsedBadges.contains("moderator"));
+            channel->setVIP(parsedBadges.contains("vip"));
+            channel->setStaff(parsedBadges.contains("staff"));
         }
     }
 
-    this->addMessage(message, chan, unescapeZeroWidthJoiner(message->content()),
-                     twitchServer, false, message->isAction());
+    addMessage(message, sink, channel,
+               unescapeZeroWidthJoiner(message->content()), false,
+               message->isAction());
 
     if (message->tags().contains(u"pinned-chat-paid-amount"_s))
     {
         auto ptr = MessageBuilder::buildHypeChatMessage(message);
         if (ptr)
         {
-            chan->addMessage(ptr, MessageContext::Original);
+            sink.addMessage(ptr, MessageContext::Original);
         }
     }
 }
@@ -900,7 +474,8 @@ void IrcMessageHandler::handleClearChatMessage(Communi::IrcMessage *message)
         return;
     }
 
-    chan->addOrReplaceTimeout(std::move(clearChat.message));
+    chan->addOrReplaceTimeout(std::move(clearChat.message),
+                              calculateMessageTime(message).time());
 
     // refresh all
     getApp()->getWindows()->repaintVisibleChatWidgets(chan.get());
@@ -1039,11 +614,24 @@ void IrcMessageHandler::handleWhisperMessage(Communi::IrcMessage *ircMessage)
 
 void IrcMessageHandler::handleUserNoticeMessage(Communi::IrcMessage *message,
                                                 ITwitchIrcServer &twitchServer)
+{
+    auto target = message->parameter(0);
+    auto *channel = dynamic_cast<TwitchChannel *>(
+        twitchServer.getChannelOrEmpty(target).get());
+    if (!channel)
+    {
+        return;
+    }
+    parseUserNoticeMessageInto(message, *channel, channel);
+}
+
+void IrcMessageHandler::parseUserNoticeMessageInto(Communi::IrcMessage *message,
+                                                   MessageSink &sink,
+                                                   TwitchChannel *channel)
 {
     auto tags = message->tags();
     auto parameters = message->parameters();
 
-    auto target = parameters[0];
     QString msgType = tags.value("msg-id").toString();
     bool mirrored = msgType == "sharedchatnotice";
     if (mirrored)
@@ -1072,12 +660,11 @@ void IrcMessageHandler::handleUserNoticeMessage(Communi::IrcMessage *message,
         content = parameters[1];
     }
 
-    auto chn = twitchServer.getChannelOrEmpty(target);
     if (isIgnoredMessage({
             .message = content,
             .twitchUserID = tags.value("user-id").toString(),
-            .isMod = chn->isMod(),
-            .isBroadcaster = chn->isBroadcaster(),
+            .isMod = channel->isMod(),
+            .isBroadcaster = channel->isBroadcaster(),
         }))
     {
         return;
@@ -1088,7 +675,7 @@ void IrcMessageHandler::handleUserNoticeMessage(Communi::IrcMessage *message,
         // Messages are not required, so they might be empty
         if (!content.isEmpty())
         {
-            this->addMessage(message, chn, content, twitchServer, true, false);
+            addMessage(message, sink, channel, content, true, false);
         }
     }
 
@@ -1136,25 +723,7 @@ void IrcMessageHandler::handleUserNoticeMessage(Communi::IrcMessage *message,
                 }
                 auto newMessage = b.release();
 
-                QString channelName;
-
-                if (message->parameters().size() < 1)
-                {
-                    return;
-                }
-
-                if (!trimChannelName(message->parameter(0), channelName))
-                {
-                    return;
-                }
-
-                auto chan = twitchServer.getChannelOrEmpty(channelName);
-
-                if (!chan->isEmpty())
-                {
-                    chan->addMessage(newMessage, MessageContext::Original);
-                }
-
+                sink.addMessage(newMessage, MessageContext::Original);
                 return;
             }
         }
@@ -1235,124 +804,104 @@ void IrcMessageHandler::handleUserNoticeMessage(Communi::IrcMessage *message,
         }
         auto newMessage = b.release();
 
-        QString channelName;
-
-        if (message->parameters().size() < 1)
-        {
-            return;
-        }
-
-        if (!trimChannelName(message->parameter(0), channelName))
-        {
-            return;
-        }
-
-        auto chan = twitchServer.getChannelOrEmpty(channelName);
-
-        if (!chan->isEmpty())
-        {
-            chan->addMessage(newMessage, MessageContext::Original);
-        }
+        sink.addMessage(newMessage, MessageContext::Original);
     }
 }
 
 void IrcMessageHandler::handleNoticeMessage(Communi::IrcNoticeMessage *message)
 {
-    auto builtMessages = parseNoticeMessage(message);
+    auto msg = parseNoticeMessage(message);
 
-    for (const auto &msg : builtMessages)
+    QString channelName;
+    if (!trimChannelName(message->target(), channelName) ||
+        channelName == "jtv")
     {
-        QString channelName;
-        if (!trimChannelName(message->target(), channelName) ||
-            channelName == "jtv")
-        {
-            // Notice wasn't targeted at a single channel, send to all twitch
-            // channels
-            getApp()->getTwitch()->forEachChannelAndSpecialChannels(
-                [msg](const auto &c) {
-                    c->addMessage(msg, MessageContext::Original);
-                });
+        // Notice wasn't targeted at a single channel, send to all twitch
+        // channels
+        getApp()->getTwitch()->forEachChannelAndSpecialChannels(
+            [msg](const auto &c) {
+                c->addMessage(msg, MessageContext::Original);
+            });
 
+        return;
+    }
+
+    auto channel = getApp()->getTwitch()->getChannelOrEmpty(channelName);
+
+    if (channel->isEmpty())
+    {
+        qCDebug(chatterinoTwitch)
+            << "[IrcManager:handleNoticeMessage] Channel" << channelName
+            << "not found in channel manager";
+        return;
+    }
+
+    QString tags = message->tags().value("msg-id").toString();
+    if (tags == "usage_delete")
+    {
+        channel->addSystemMessage(
+            "Usage: /delete <msg-id> - Deletes the specified message. "
+            "Can't take more than one argument.");
+    }
+    else if (tags == "bad_delete_message_error")
+    {
+        channel->addSystemMessage(
+            "There was a problem deleting the message. "
+            "It might be from another channel or too old to delete.");
+    }
+    else if (tags == "host_on" || tags == "host_target_went_offline")
+    {
+        bool hostOn = (tags == "host_on");
+        QStringList parts = msg->messageText.split(QLatin1Char(' '));
+        if ((hostOn && parts.size() != 3) || (!hostOn && parts.size() != 7))
+        {
             return;
         }
-
-        auto channel = getApp()->getTwitch()->getChannelOrEmpty(channelName);
-
-        if (channel->isEmpty())
+        auto &hostedChannelName = hostOn ? parts[2] : parts[0];
+        if (hostedChannelName.size() < 2)
         {
-            qCDebug(chatterinoTwitch)
-                << "[IrcManager:handleNoticeMessage] Channel" << channelName
-                << "not found in channel manager";
             return;
         }
-
-        QString tags = message->tags().value("msg-id").toString();
-        if (tags == "usage_delete")
+        if (hostOn)
         {
-            channel->addSystemMessage(
-                "Usage: /delete <msg-id> - Deletes the specified message. "
-                "Can't take more than one argument.");
+            hostedChannelName.chop(1);
         }
-        else if (tags == "bad_delete_message_error")
-        {
-            channel->addSystemMessage(
-                "There was a problem deleting the message. "
-                "It might be from another channel or too old to delete.");
-        }
-        else if (tags == "host_on" || tags == "host_target_went_offline")
-        {
-            bool hostOn = (tags == "host_on");
-            QStringList parts = msg->messageText.split(QLatin1Char(' '));
-            if ((hostOn && parts.size() != 3) || (!hostOn && parts.size() != 7))
-            {
-                return;
-            }
-            auto &hostedChannelName = hostOn ? parts[2] : parts[0];
-            if (hostedChannelName.size() < 2)
-            {
-                return;
-            }
-            if (hostOn)
-            {
-                hostedChannelName.chop(1);
-            }
-            channel->addMessage(MessageBuilder::makeHostingSystemMessage(
-                                    hostedChannelName, hostOn),
-                                MessageContext::Original);
-        }
-        else if (tags == "room_mods" || tags == "vips_success")
-        {
-            // /mods and /vips
-            // room_mods: The moderators of this channel are: ampzyh, antichriststollen, apa420, ...
-            // vips_success: The VIPs of this channel are: 8008, aiden, botfactory, ...
+        channel->addMessage(
+            MessageBuilder::makeHostingSystemMessage(hostedChannelName, hostOn),
+            MessageContext::Original);
+    }
+    else if (tags == "room_mods" || tags == "vips_success")
+    {
+        // /mods and /vips
+        // room_mods: The moderators of this channel are: ampzyh, antichriststollen, apa420, ...
+        // vips_success: The VIPs of this channel are: 8008, aiden, botfactory, ...
 
-            QString noticeText = msg->messageText;
-            if (tags == "vips_success")
-            {
-                // this one has a trailing period, need to get rid of it.
-                noticeText.chop(1);
-            }
-
-            QStringList msgParts = noticeText.split(':');
-            MessageBuilder builder;
-
-            auto *tc = dynamic_cast<TwitchChannel *>(channel.get());
-            assert(tc != nullptr &&
-                   "IrcMessageHandler::handleNoticeMessage. Twitch specific "
-                   "functionality called in non twitch channel");
-
-            auto users = msgParts.at(1)
-                             .mid(1)  // there is a space before the first user
-                             .split(", ");
-            users.sort(Qt::CaseInsensitive);
-            channel->addMessage(MessageBuilder::makeListOfUsersMessage(
-                                    msgParts.at(0), users, tc),
-                                MessageContext::Original);
-        }
-        else
+        QString noticeText = msg->messageText;
+        if (tags == "vips_success")
         {
-            channel->addMessage(msg, MessageContext::Original);
+            // this one has a trailing period, need to get rid of it.
+            noticeText.chop(1);
         }
+
+        QStringList msgParts = noticeText.split(':');
+        MessageBuilder builder;
+
+        auto *tc = dynamic_cast<TwitchChannel *>(channel.get());
+        assert(tc != nullptr &&
+               "IrcMessageHandler::handleNoticeMessage. Twitch specific "
+               "functionality called in non twitch channel");
+
+        auto users = msgParts.at(1)
+                         .mid(1)  // there is a space before the first user
+                         .split(", ");
+        users.sort(Qt::CaseInsensitive);
+        channel->addMessage(
+            MessageBuilder::makeListOfUsersMessage(msgParts.at(0), users, tc),
+            MessageContext::Original);
+    }
+    else
+    {
+        channel->addMessage(msg, MessageContext::Original);
     }
 }
 
@@ -1405,76 +954,12 @@ void IrcMessageHandler::handlePartMessage(Communi::IrcMessage *message)
     }
 }
 
-float IrcMessageHandler::similarity(
-    const MessagePtr &msg, const LimitedQueueSnapshot<MessagePtr> &messages)
-{
-    float similarityPercent = 0.0F;
-    int checked = 0;
-
-    for (int i = 1; i <= messages.size(); ++i)
-    {
-        if (checked >= getSettings()->hideSimilarMaxMessagesToCheck)
-        {
-            break;
-        }
-        const auto &prevMsg = messages[messages.size() - i];
-        if (prevMsg->parseTime.secsTo(QTime::currentTime()) >=
-            getSettings()->hideSimilarMaxDelay)
-        {
-            break;
-        }
-        if (getSettings()->hideSimilarBySameUser &&
-            msg->loginName != prevMsg->loginName)
-        {
-            continue;
-        }
-        ++checked;
-        similarityPercent = std::max(
-            similarityPercent,
-            relativeSimilarity(msg->messageText, prevMsg->messageText));
-    }
-
-    return similarityPercent;
-}
-
-void IrcMessageHandler::setSimilarityFlags(const MessagePtr &message,
-                                           const ChannelPtr &channel)
-{
-    if (getSettings()->similarityEnabled)
-    {
-        bool isMyself =
-            message->loginName ==
-            getApp()->getAccounts()->twitch.getCurrent()->getUserName();
-        bool hideMyself = getSettings()->hideSimilarMyself;
-
-        if (isMyself && !hideMyself)
-        {
-            return;
-        }
-
-        if (IrcMessageHandler::similarity(message,
-                                          channel->getMessageSnapshot()) >
-            getSettings()->similarityPercentage)
-        {
-            message->flags.set(MessageFlag::Similar, true);
-            if (getSettings()->colorSimilarDisabled)
-            {
-                message->flags.set(MessageFlag::Disabled, true);
-            }
-        }
-    }
-}
-
 void IrcMessageHandler::addMessage(Communi::IrcMessage *message,
-                                   const ChannelPtr &chan,
-                                   const QString &originalContent,
-                                   ITwitchIrcServer &server, bool isSub,
+                                   MessageSink &sink, TwitchChannel *channel,
+                                   const QString &originalContent, bool isSub,
                                    bool isAction)
 {
-    if (chan->isEmpty())
-    {
-        return;
-    }
+    assert(channel);
 
     MessageParseArgs args;
     if (isSub)
@@ -1483,14 +968,12 @@ void IrcMessageHandler::addMessage(Communi::IrcMessage *message,
         args.trimSubscriberUsername = true;
     }
 
-    if (chan->isBroadcaster())
+    if (channel->isBroadcaster())
     {
         args.isStaffOrBroadcaster = true;
     }
     args.isAction = isAction;
 
-    auto *channel = dynamic_cast<TwitchChannel *>(chan.get());
-
     const auto &tags = message->tags();
     QString rewardId;
     if (const auto it = tags.find("custom-reward-id"); it != tags.end())
@@ -1506,7 +989,10 @@ void IrcMessageHandler::addMessage(Communi::IrcMessage *message,
             rewardId = msgId;
         }
     }
-    if (!rewardId.isEmpty() && !channel->isChannelPointRewardKnown(rewardId))
+    if (!rewardId.isEmpty() &&
+        sink.sinkTraits().has(
+            MessageSinkTrait::RequiresKnownChannelPointReward) &&
+        !channel->isChannelPointRewardKnown(rewardId))
     {
         // Need to wait for pubsub reward notification
         qCDebug(chatterinoTwitch) << "TwitchChannel reward added ADD "
@@ -1539,7 +1025,7 @@ void IrcMessageHandler::addMessage(Communi::IrcMessage *message,
         else
         {
             // Thread does not yet exist, find root reply and create thread.
-            auto root = channel->findMessage(replyID);
+            auto root = sink.findMessageByID(replyID);
             if (root)
             {
                 // Found root reply message
@@ -1577,7 +1063,7 @@ void IrcMessageHandler::addMessage(Communi::IrcMessage *message,
                 }
                 else
                 {
-                    auto parent = channel->findMessage(parentID);
+                    auto parent = sink.findMessageByID(parentID);
                     if (parent)
                     {
                         replyCtx.parent = parent;
@@ -1600,7 +1086,7 @@ void IrcMessageHandler::addMessage(Communi::IrcMessage *message,
             msg->flags.unset(MessageFlag::Highlighted);
         }
 
-        IrcMessageHandler::setSimilarityFlags(msg, chan);
+        sink.applySimilarityFilters(msg);
 
         if (!msg->flags.has(MessageFlag::Similar) ||
             (!getSettings()->hideSimilar &&
@@ -1612,17 +1098,15 @@ void IrcMessageHandler::addMessage(Communi::IrcMessage *message,
         const auto highlighted = msg->flags.has(MessageFlag::Highlighted);
         const auto showInMentions = msg->flags.has(MessageFlag::ShowInMentions);
 
-        if (highlighted && showInMentions)
+        if (highlighted && showInMentions &&
+            sink.sinkTraits().has(MessageSinkTrait::AddMentionsToGlobalChannel))
         {
-            server.getMentionsChannel()->addMessage(msg,
-                                                    MessageContext::Original);
+            getApp()->getTwitch()->getMentionsChannel()->addMessage(
+                msg, MessageContext::Original);
         }
 
-        chan->addMessage(msg, MessageContext::Original);
-        if (auto *chatters = dynamic_cast<ChannelChatters *>(chan.get()))
-        {
-            chatters->addRecentChatter(msg->displayName);
-        }
+        sink.addMessage(msg, MessageContext::Original);
+        channel->addRecentChatter(msg->displayName);
     }
 }
 
diff --git a/src/providers/twitch/IrcMessageHandler.hpp b/src/providers/twitch/IrcMessageHandler.hpp
index ba6d2d983..73d81e022 100644
--- a/src/providers/twitch/IrcMessageHandler.hpp
+++ b/src/providers/twitch/IrcMessageHandler.hpp
@@ -16,6 +16,7 @@ struct Message;
 using MessagePtr = std::shared_ptr<const Message>;
 class TwitchChannel;
 class TwitchMessageBuilder;
+class MessageSink;
 
 struct ClearChatMessage {
     MessagePtr message;
@@ -33,30 +34,35 @@ public:
      * Parse an IRC message into 0 or more Chatterino messages
      * Takes previously loaded messages into consideration to add reply contexts
      **/
-    static std::vector<MessagePtr> parseMessageWithReply(
-        Channel *channel, Communi::IrcMessage *message,
-        std::vector<MessagePtr> &otherLoaded);
+    static void parseMessageInto(Communi::IrcMessage *message,
+                                 MessageSink &sink, TwitchChannel *channel);
 
     void handlePrivMessage(Communi::IrcPrivateMessage *message,
                            ITwitchIrcServer &twitchServer);
+    static void parsePrivMessageInto(Communi::IrcPrivateMessage *message,
+                                     MessageSink &sink, TwitchChannel *channel);
 
     void handleRoomStateMessage(Communi::IrcMessage *message);
     void handleClearChatMessage(Communi::IrcMessage *message);
     void handleClearMessageMessage(Communi::IrcMessage *message);
     void handleUserStateMessage(Communi::IrcMessage *message);
-    void handleWhisperMessage(Communi::IrcMessage *ircMessage);
 
+    void handleWhisperMessage(Communi::IrcMessage *ircMessage);
     void handleUserNoticeMessage(Communi::IrcMessage *message,
                                  ITwitchIrcServer &twitchServer);
+    static void parseUserNoticeMessageInto(Communi::IrcMessage *message,
+                                           MessageSink &sink,
+                                           TwitchChannel *channel);
 
     void handleNoticeMessage(Communi::IrcNoticeMessage *message);
 
     void handleJoinMessage(Communi::IrcMessage *message);
     void handlePartMessage(Communi::IrcMessage *message);
 
-    void addMessage(Communi::IrcMessage *message, const ChannelPtr &chan,
-                    const QString &originalContent, ITwitchIrcServer &server,
-                    bool isSub, bool isAction);
+    static void addMessage(Communi::IrcMessage *message, MessageSink &sink,
+                           TwitchChannel *channel,
+                           const QString &originalContent, bool isSub,
+                           bool isAction);
 
 private:
     static float similarity(const MessagePtr &msg,
diff --git a/src/providers/twitch/TwitchChannel.cpp b/src/providers/twitch/TwitchChannel.cpp
index 93ac4519c..86d26c249 100644
--- a/src/providers/twitch/TwitchChannel.cpp
+++ b/src/providers/twitch/TwitchChannel.cpp
@@ -452,8 +452,8 @@ void TwitchChannel::addChannelPointReward(const ChannelPointReward &reward)
                 if (reward.id == msg.rewardID)
                 {
                     IrcMessageHandler::instance().addMessage(
-                        msg.message.get(), shared_from_this(),
-                        msg.originalContent, *server, false, false);
+                        msg.message.get(), *this, this, msg.originalContent,
+                        false, false);
                     return true;
                 }
                 return false;
diff --git a/src/providers/twitch/TwitchIrcServer.cpp b/src/providers/twitch/TwitchIrcServer.cpp
index 9ca93f6fd..9e2fe2fbf 100644
--- a/src/providers/twitch/TwitchIrcServer.cpp
+++ b/src/providers/twitch/TwitchIrcServer.cpp
@@ -312,7 +312,7 @@ void TwitchIrcServer::initialize()
             postToThread([chan, action] {
                 MessageBuilder msg(action);
                 msg->flags.set(MessageFlag::PubSub);
-                chan->addOrReplaceTimeout(msg.release());
+                chan->addOrReplaceTimeout(msg.release(), QTime::currentTime());
             });
         });
 
diff --git a/src/util/VectorMessageSink.cpp b/src/util/VectorMessageSink.cpp
new file mode 100644
index 000000000..06f2ad316
--- /dev/null
+++ b/src/util/VectorMessageSink.cpp
@@ -0,0 +1,86 @@
+#include "util/VectorMessageSink.hpp"
+
+#include "messages/MessageSimilarity.hpp"
+#include "util/ChannelHelpers.hpp"
+
+#include <cassert>
+
+namespace chatterino {
+
+VectorMessageSink::VectorMessageSink(MessageSinkTraits traits,
+                                     MessageFlags additionalFlags)
+    : additionalFlags(additionalFlags)
+    , traits(traits) {};
+VectorMessageSink::~VectorMessageSink() = default;
+
+void VectorMessageSink::addMessage(MessagePtr message, MessageContext ctx,
+                                   std::optional<MessageFlags> overridingFlags)
+{
+    assert(!overridingFlags.has_value());
+    assert(ctx == MessageContext::Original);
+
+    message->flags.set(this->additionalFlags);
+    this->messages_.emplace_back(std::move(message));
+}
+
+void VectorMessageSink::addOrReplaceTimeout(MessagePtr clearchatMessage,
+                                            QTime now)
+{
+    addOrReplaceChannelTimeout(
+        this->messages_, std::move(clearchatMessage), now,
+        [&](auto idx, auto /*msg*/, auto &&replacement) {
+            replacement->flags.set(this->additionalFlags);
+            this->messages_[idx] = replacement;
+        },
+        [&](auto &&msg) {
+            this->messages_.emplace_back(msg);
+        },
+        false);
+}
+
+void VectorMessageSink::disableAllMessages()
+{
+    if (this->additionalFlags.has(MessageFlag::RecentMessage))
+    {
+        return;  // don't disable recent messages
+    }
+
+    for (const auto &msg : this->messages_)
+    {
+        msg->flags.set(MessageFlag::Disabled);
+    }
+}
+
+void VectorMessageSink::applySimilarityFilters(const MessagePtr &message) const
+{
+    setSimilarityFlags(message, this->messages_);
+}
+
+MessagePtr VectorMessageSink::findMessageByID(QStringView id)
+{
+    for (const auto &msg : this->messages_ | std::views::reverse)
+    {
+        if (msg->id == id)
+        {
+            return msg;
+        }
+    }
+    return {};
+}
+
+const std::vector<MessagePtr> &VectorMessageSink::messages() const
+{
+    return this->messages_;
+}
+
+std::vector<MessagePtr> VectorMessageSink::takeMessages() &&
+{
+    return std::move(this->messages_);
+}
+
+MessageSinkTraits VectorMessageSink::sinkTraits() const
+{
+    return this->traits;
+}
+
+}  // namespace chatterino
diff --git a/src/util/VectorMessageSink.hpp b/src/util/VectorMessageSink.hpp
new file mode 100644
index 000000000..c4ffcfa9c
--- /dev/null
+++ b/src/util/VectorMessageSink.hpp
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "messages/MessageSink.hpp"
+
+namespace chatterino {
+
+class VectorMessageSink final : public MessageSink
+{
+public:
+    VectorMessageSink(MessageSinkTraits traits = {},
+                      MessageFlags additionalFlags = {});
+    ~VectorMessageSink() override;
+
+    void addMessage(
+        MessagePtr message, MessageContext ctx,
+        std::optional<MessageFlags> overridingFlags = std::nullopt) override;
+    void addOrReplaceTimeout(MessagePtr clearchatMessage, QTime now) override;
+
+    void disableAllMessages() override;
+
+    void applySimilarityFilters(const MessagePtr &message) const override;
+
+    MessagePtr findMessageByID(QStringView id) override;
+
+    MessageSinkTraits sinkTraits() const override;
+
+    const std::vector<MessagePtr> &messages() const;
+    std::vector<MessagePtr> takeMessages() &&;
+
+private:
+    std::vector<MessagePtr> messages_;
+    MessageFlags additionalFlags;
+    MessageSinkTraits traits;
+};
+
+}  // namespace chatterino
diff --git a/tests/snapshots/IrcMessageHandler/announcement.json b/tests/snapshots/IrcMessageHandler/announcement.json
index b3ddfd2e6..06b21210c 100644
--- a/tests/snapshots/IrcMessageHandler/announcement.json
+++ b/tests/snapshots/IrcMessageHandler/announcement.json
@@ -180,6 +180,7 @@
                 }
             ],
             "flags": "Collapsed|Subscription",
+            "highlightColor": "#64c466ff",
             "id": "8c26e1ab-b50c-4d9d-bc11-3fd57a941d90",
             "localizedName": "",
             "loginName": "supinic",
diff --git a/tests/snapshots/IrcMessageHandler/reply-child.json b/tests/snapshots/IrcMessageHandler/reply-child.json
index 8862f7738..be8a17317 100644
--- a/tests/snapshots/IrcMessageHandler/reply-child.json
+++ b/tests/snapshots/IrcMessageHandler/reply-child.json
@@ -80,7 +80,7 @@
                     "trailingSpace": true,
                     "type": "SingleLineTextElement",
                     "words": [
-                        "a"
+                        "b"
                     ]
                 },
                 {
@@ -169,6 +169,7 @@
             "localizedName": "",
             "loginName": "nerixyz",
             "messageText": "c",
+            "replyParent": "474f19ab-a1b0-410a-877a-5b0e2ae8be6d",
             "replyThread": {
                 "replies": [
                     "474f19ab-a1b0-410a-877a-5b0e2ae8be6d",
diff --git a/tests/snapshots/IrcMessageHandler/shared-chat-announcement.json b/tests/snapshots/IrcMessageHandler/shared-chat-announcement.json
index a6877c365..f612fd720 100644
--- a/tests/snapshots/IrcMessageHandler/shared-chat-announcement.json
+++ b/tests/snapshots/IrcMessageHandler/shared-chat-announcement.json
@@ -256,6 +256,7 @@
                 }
             ],
             "flags": "Collapsed|Subscription|SharedMessage",
+            "highlightColor": "#64c466ff",
             "id": "01cd601f-bc3f-49d5-ab4b-136fa9d6ec22",
             "localizedName": "",
             "loginName": "lahoooo",
diff --git a/tests/snapshots/IrcMessageHandler/sub-message.json b/tests/snapshots/IrcMessageHandler/sub-message.json
index fd74777c5..98c787647 100644
--- a/tests/snapshots/IrcMessageHandler/sub-message.json
+++ b/tests/snapshots/IrcMessageHandler/sub-message.json
@@ -243,6 +243,7 @@
                 }
             ],
             "flags": "Collapsed|Subscription",
+            "highlightColor": "#64c466ff",
             "id": "db25007f-7a18-43eb-9379-80131e44d633",
             "localizedName": "",
             "loginName": "ronni",
diff --git a/tests/src/IrcMessageHandler.cpp b/tests/src/IrcMessageHandler.cpp
index a80e928ef..11a9b65f4 100644
--- a/tests/src/IrcMessageHandler.cpp
+++ b/tests/src/IrcMessageHandler.cpp
@@ -27,6 +27,7 @@
 #include "singletons/Emotes.hpp"
 #include "Test.hpp"
 #include "util/IrcHelpers.hpp"
+#include "util/VectorMessageSink.hpp"
 
 #include <IrcConnection>
 #include <QDebug>
@@ -53,7 +54,7 @@ namespace {
 ///
 /// When adding a test, start with `{ "input": "..." }` and set this to `true`
 /// to generate an initial snapshot. Make sure to verify the output!
-constexpr bool UPDATE_SNAPSHOTS = false;
+constexpr bool UPDATE_SNAPSHOTS = true;
 
 const QString IRC_CATEGORY = u"IrcMessageHandler"_s;
 
@@ -572,19 +573,14 @@ TEST_P(TestIrcMessageHandlerP, Run)
 {
     auto channel = makeMockTwitchChannel(u"pajlada"_s, *snapshot);
 
-    std::vector<MessagePtr> prevMessages;
+    VectorMessageSink sink;
 
     for (auto prevInput : snapshot->param("prevMessages").toArray())
     {
         auto *ircMessage = Communi::IrcMessage::fromData(
             prevInput.toString().toUtf8(), nullptr);
         ASSERT_NE(ircMessage, nullptr);
-        auto builtMessages = IrcMessageHandler::parseMessageWithReply(
-            channel.get(), ircMessage, prevMessages);
-        for (const auto &builtMessage : builtMessages)
-        {
-            prevMessages.emplace_back(builtMessage);
-        }
+        IrcMessageHandler::parseMessageInto(ircMessage, sink, channel.get());
         delete ircMessage;
     }
 
@@ -592,13 +588,13 @@ TEST_P(TestIrcMessageHandlerP, Run)
         Communi::IrcMessage::fromData(snapshot->inputUtf8(), nullptr);
     ASSERT_NE(ircMessage, nullptr);
 
-    auto builtMessages = IrcMessageHandler::parseMessageWithReply(
-        channel.get(), ircMessage, prevMessages);
+    auto firstAddedMsg = sink.messages().size();
+    IrcMessageHandler::parseMessageInto(ircMessage, sink, channel.get());
 
     QJsonArray got;
-    for (const auto &msg : builtMessages)
+    for (auto i = firstAddedMsg; i < sink.messages().size(); i++)
     {
-        got.append(msg->toJson());
+        got.append(sink.messages()[i]->toJson());
     }
 
     delete ircMessage;