“With 68 people who’ve contributed 100+ commits, Zulip has by far the most active open-source development community of any team chat software, and is translated into 17 languages.”
Over 4,300 commits went into this release. Slack still owns the market with a channel model that turns every busy room into noise. Zulip fixed that with topics years ago. Being right about threading has not beaten Slack’s sales team.