Apache Answer is a modern open-source Q&A platform for teams to build knowledge bases, forums, and help centers.

15.6k stars1.3k forksApache-2.0last commit Actively maintained

Cloud-hosted community platform for building branded online communities with discussion forums, knowledge base, member profiles, groups, events, moderation, analytics, APIs/webhooks, integrations and AI-powered search and moderation; used for customer communities and support.
Apache Answer is a modern open-source Q&A platform for teams to build knowledge bases, forums, and help centers.

15.6k stars1.3k forksApache-2.0last commit Actively maintained
Self-hostable community discussion platform combining Q&A, forums, team chat, ideation/upvoting, and Disqus-style embedded blog comments.

1.8k stars128 forksAGPL-3.0last commit Actively maintained
Elgg is a modular open source platform for building social networks and collaborative communities with plugin-based extensions.

1.7k stars667 forkslast commit Actively maintained
Open source Stack Overflow clone for teams: Q&A, knowledge sharing, search, spaces, reputation, webhooks, and integrations via a Para backend.

921 stars230 forksApache-2.0last commit Actively maintained
BuddyPress is a WordPress plugin that adds member profiles, activity streams, groups, messaging, and extensibility to build community and social networking sites.

250 stars169 forkslast commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 5 of 5 shipped a commit in the last six months. Licences in this list: Apache-2.0, AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Forums & Discussion Boards.