head to head · open source
Zulip vs chitchatter
Zulip has 26,165 GitHub stars, 10,531 forks, 2,008 open issues and last shipped 2 days ago. chitchatter has 2,344 stars, 451 forks, 53 open issues and last shipped 2 days ago. Zulip leads on adoption by 1,016% (26,165 vs 2,344 stars). Zulip is written in Python under Apache-2.0; chitchatter is written in TypeScript under GPL-2.0. Zulip has attracted 40% as many forks as stars, chitchatter 19%. Zulip was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (chat), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Zulip | chitchatter | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 2.3K |
| License | Apache-2.0 | GPL-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-11-03 | 2026-11-03 |
| Forks | ⑂ 11K | ⑂ 451 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Zulip if
- You weight community size — 26K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick chitchatter if
- You want the chitchatter feature set and don't need the biggest community
- You prefer the GPL-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and chitchatter fits your workflow better
About Zulip
Zulip overview Zulip is an open source organized team chat app with unique [topic based threading][why zulip] that combines the best of email and chat to make remote work productive and delightful. Fortune 500 companies, [leading open source projects][rust case study], and thousands of other organizations use Zulip every day. Zulip is the only [modern team chat app][features] that is designed for both live and asynchronous conversations. Zulip is built by a distributed community of developers from all around the world, with 99+ people who have each contributed 100+ commits. With over 1,500 contributors merging…
read the full Zulip overview →
About chitchatter
Chitchatter Logo provided by @ramyashreeshetty Chitchatter is a free (as in both price and freedom) communication tool. Designed to be the simplest way to connect with others privately and securely, it is: Fully open source (licensed under GPL v2) Peer to peer Whenever possible, otherwise a TURN server is used to ensure reliable peer connection End to end encrypted (via WebRTC) Ephemeral Message content is never persisted to disk on either the client or server Decentralized No API server required . Chitchatter works completely without an API server all that's required for basic functionality is availability of…
read the full chitchatter overview →
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Frequently asked questions
Is Zulip or chitchatter more popular?
Zulip has 26,165 GitHub stars and chitchatter has 2,344. Zulip has the larger community by that measure.
Are Zulip and chitchatter free?
Both are open source. Zulip is licensed under Apache-2.0 and chitchatter under GPL-2.0. Neither carries a licence fee.
What is the difference between Zulip and chitchatter?
Zulip is written in Python and chitchatter in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Zulip or chitchatter?
Choose Zulip if you want the larger community (26,165 stars) or its Apache-2.0 licence terms. Choose chitchatter if its feature set, stack or GPL-2.0 licence fits better. Both are self-hostable.