You can kinda do this with Notion AI. It's not quite the same as slack ofcourse because you need to manually build up the knowledge base first but if it is well

You can kinda do this with Notion AI. It's not quite the same as slack ofcourse because you need to manually build up the knowledge base first but if it is well maintained you can use it to answer questions easily. Probably there is some tools out there to create notion pages from slack history? Would be a useful tool at least.