diff --git a/backend/src/plugins/Automod/actions/addReactions.ts b/backend/src/plugins/Automod/actions/addReactions.ts
new file mode 100644
index 000000000..72a627ce4
--- /dev/null
+++ b/backend/src/plugins/Automod/actions/addReactions.ts
@@ -0,0 +1,37 @@
+import { Snowflake } from "discord.js";
+import { z } from "zod";
+import { noop } from "../../../utils.js";
+import { automodAction } from "../helpers.js";
+
+const configSchema = z.array(z.string())
+
+export const AddReactionsAction = automodAction({
+  configSchema,
+
+  async apply({ pluginData, contexts, actionConfig }) {
+    const messageIdsByChannel = new Map<string, Set<string>>();
+
+    for (const context of contexts) {
+      if (context.message) {
+        if (!messageIdsByChannel.has(context.message.channel_id)) {
+          messageIdsByChannel.set(context.message.channel_id, new Set<string>());
+        }
+        messageIdsByChannel.get(context.message.channel_id)!.add(context.message.id);
+      }
+    }
+
+    for (const [channelId, messageIds] of messageIdsByChannel.entries()) {
+      const channel = pluginData.guild.channels.cache.get(channelId as Snowflake)
+      if (!channel?.isTextBased?.()) continue;
+
+      for (const messageId of messageIds) {
+        const msg = await channel.messages.fetch(messageId).catch(noop);
+        if (!msg) continue;
+
+        for (const emoji of actionConfig) {
+          await msg.react(emoji).catch(noop);
+        }
+      }
+    }
+  },
+});
diff --git a/backend/src/plugins/Automod/actions/availableActions.ts b/backend/src/plugins/Automod/actions/availableActions.ts
index e499a42d4..c1161a1e7 100644
--- a/backend/src/plugins/Automod/actions/availableActions.ts
+++ b/backend/src/plugins/Automod/actions/availableActions.ts
@@ -1,4 +1,5 @@
 import { AutomodActionBlueprint } from "../helpers.js";
+import { AddReactionsAction } from "./addReactions.js";
 import { AddRolesAction } from "./addRoles.js";
 import { AddToCounterAction } from "./addToCounter.js";
 import { AlertAction } from "./alert.js";
@@ -29,6 +30,7 @@ export const availableActions = {
   change_nickname: ChangeNicknameAction,
   log: LogAction,
   add_roles: AddRolesAction,
+  add_reactions: AddReactionsAction,
   remove_roles: RemoveRolesAction,
   set_antiraid_level: SetAntiraidLevelAction,
   reply: ReplyAction,