diff --git a/hypha/apply/activity/messaging.py b/hypha/apply/activity/messaging.py
index d3872bab38d50dae1de453ee8274f38937cd9a0a..d2c7b76cbd78218fdb53d1af1193f0f26d5124d8 100644
--- a/hypha/apply/activity/messaging.py
+++ b/hypha/apply/activity/messaging.py
@@ -430,6 +430,7 @@ class SlackAdapter(AdapterBase):
         self.destination = settings.SLACK_DESTINATION_URL
         self.target_room = settings.SLACK_DESTINATION_ROOM
         self.comments_room = settings.SLACK_DESTINATION_ROOM_COMMENTS
+        self.comments_type = settings.SLACK_TYPE_COMMENTS
 
     def slack_links(self, links, sources):
         return ', '.join(
@@ -603,11 +604,17 @@ class SlackAdapter(AdapterBase):
             target_rooms.extend(extra_rooms)
 
         try:
-            if self.comments_room and kwargs['comment']:
-                target_rooms.extend([self.comments_room])
+            comment = kwargs['comment']
         except KeyError:
-            # Not a comment.
+            # Not a comment, no extra rooms.
             pass
+        else:
+            if self.comments_room:
+                if any(self.comments_type):
+                    if comment.visibility in self.comments_type:
+                        target_rooms.extend([self.comments_room])
+                else:
+                    target_rooms.extend([self.comments_room])
 
         # Make sure each channel name starts with a "#".
         target_rooms = [
diff --git a/hypha/settings/base.py b/hypha/settings/base.py
index f9cedc9c54e31200cd315760cca3f7973814c430..d3936a389ce98385985667d63b630ddbae301647 100644
--- a/hypha/settings/base.py
+++ b/hypha/settings/base.py
@@ -507,6 +507,10 @@ if not SEND_MESSAGES:
 SLACK_DESTINATION_URL = env.get('SLACK_DESTINATION_URL', None)
 SLACK_DESTINATION_ROOM = env.get('SLACK_DESTINATION_ROOM', None)
 SLACK_DESTINATION_ROOM_COMMENTS = env.get('SLACK_DESTINATION_ROOM_COMMENTS', None)
+if 'SLACK_TYPE_COMMENTS' in env:
+    SLACK_TYPE_COMMENTS = env['SLACK_TYPE_COMMENTS'].split(',')
+else:
+    SLACK_TYPE_COMMENTS = []
 
 
 # Celery config