Featured · Our projectOpenPartnerMeet the first project supporting OSS Hunter.

Open source. Open possibilities.

Open-source alternatives to everyday software.

Discover open-source alternatives to the tools you use. Find your next favorite project, compare the tradeoffs, and build a stack you own.

Explore The Weekly Hunt

Our newsletter is coming soon. Browse the projects today.

Today’s picks

4 results

Zulip

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

GitHub stars
26,181
License
Apache-2.0
Last commit
2026-11-06

Alternative to Slack, Microsoft Teams

Collaboration