head to head · open source
Rocket.Chat vs Buzz
Rocket.Chat has 46,361 GitHub stars, 14,076 forks, 4,023 open issues and last shipped yesterday. Buzz has 36,686 stars, 4,869 forks, 3,556 open issues and last shipped yesterday. Rocket.Chat leads on adoption by 26% (46,361 vs 36,686 stars). Rocket.Chat is written in TypeScript under a custom or non-standard licence; Buzz is written in Rust under Apache-2.0. Rocket.Chat has attracted 30% as many forks as stars, Buzz 13%. Rocket.Chat was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| Rocket.Chat | Buzz | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 37K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Rust |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 14K | ⑂ 4.9K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Rocket.Chat if
- You weight community size — 46K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Buzz if
- You want the Buzz feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and Buzz fits your workflow better
About Rocket.Chat
The ultimate secure open source solution for team communications Rocket.Chat is an open source, secure, fully customizable communications platform developed in TypeScript for organizations with high standards of data protection. We are the ultimate solution for team communications, enabling real time conversations between colleagues, with other companies, and with your customers or citizens, regardless of how they connect with you. The result is an increase in productivity and user satisfaction rates. Every day, tens of millions of users in over 150 countries and in organizations such as Deutsche Bahn, The US…
read the full Rocket.Chat overview →
About Buzz
Buzz 🐝 A workspace where humans and agents build together, on a relay you own. Vision · Sovereign · Forge · Agents · Architecture · Releasing · Apache 2.0 People and agents building together in the same room. What is this, really? Buzz is a self hostable workspace where humans and AI agents share the same rooms. A Buzz community is the workspace a user reaches by URL. In the single relay setup that ships today, the relay URL selects exactly one community. A hosted operator can serve many communities behind many domains or subdomains, but the client facing rule stays the same: the URL is authoritative for the…
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Frequently asked questions
Is Rocket.Chat or Buzz more popular?
Rocket.Chat has 46,361 GitHub stars and Buzz has 36,686. Rocket.Chat has the larger community by that measure.
Are Rocket.Chat and Buzz free?
Both are open source. Rocket.Chat has no licence declared in this registry, and Buzz is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Rocket.Chat and Buzz?
Rocket.Chat is written in TypeScript and Buzz in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Rocket.Chat or Buzz?
Choose Rocket.Chat if you want the larger community (46,361 stars) or its Custom / other licence terms. Choose Buzz if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.