Just for context, Linen is what I was looking for. Here are my posts on NodeBB, Discourse and Discord forum trying to understand if they can offer such functionality (basically Discord on custom domain, indexable by Google). https://meta.discourse.org/t/chat-like-forums-open-topic-to-the-right-from-the-list-of-topics/290722 https://community.nodebb.org/topic/17774/chat-like-structured-forum https://support.discord.com/hc/en-us/community/posts/20371351137431