Zulip

Open-source threaded team chat; the community home of Rust and other projects that outgrew unthreaded chat.

Every message lives under a topic within a channel, so conversations stay followable asynchronously and remain searchable years later; public archives can be exposed to the open web. Self-host the open-source server or use the cloud, which is free for open-source projects. Chosen by communities that treat chat history as documentation rather than scrollback.

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community chat open-source

Repo Docs25kCommit 2026-07Release 2026-06

Added July 12, 2026

Verified Aug 2026The link resolved and the product was live at this date. How we curate

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Where Zulip fits

The developer community stackWhere should a developer community live, and what keeps it alive?