head to head · open source
Zulip vs chitchatter
Zulip has 25,929 GitHub stars, 10,263 forks, 2,008 open issues and last shipped yesterday. chitchatter has 2,332 stars, 434 forks, 53 open issues and last shipped 3 days ago. Zulip leads on adoption by 1,012% (25,929 vs 2,332 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.
← all 20902 open source comparisons
Side by side
| Zulip | chitchatter | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 2.3K |
| License | Apache-2.0 | GPL-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-19 | 2026-09-17 |
| Forks | ⑂ 10K | ⑂ 434 |
| 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 is an open source organized team chat application built on topic based threading, aimed at distributed teams that need live and asynchronous conversation in one place, and it is positioned as an open alternative to Slack.
read the full Zulip overview →
About chitchatter
Chitchatter is a TypeScript web chat application released under GPL 2.0 that provides secure peer to peer communication without a required central API server. It lives in the decentralized web mesh ecosystem, using React, WebRTC, Trystero, WebTorrent, and TURN relays to connect browsers directly. The project is a free, open source collaboration tool for private conversations, video and audio chats, screen sharing, and file transfer.
read the full chitchatter overview →
More in Business Software
Related comparisons
More Collaboration & Communication projects
Compare either of these against the rest of the Collaboration & Communication field.
Frequently asked questions
Is Zulip or chitchatter more popular?
Zulip has 25,929 GitHub stars and chitchatter has 2,332. 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 (25,929 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.