Atlassian has Jira, Confluence, and Bitbucket - and their cross-platform search is getting better all the time. Confluence has AI search as well, so you can as

Atlassian has Jira, Confluence, and Bitbucket - and their cross-platform search is getting better all the time. Confluence has AI search as well, so you can ask questions in natural language. I believe the underlying AI product is called Rovo.