head to head · open source
Rocket.Chat vs Buzz
Rocket.Chat has 46,133 GitHub stars, 13,891 forks, 4,023 open issues and last shipped yesterday. Buzz has 33,508 stars, 4,389 forks, 3,556 open issues and last shipped yesterday. Rocket.Chat leads on adoption by 38% (46,133 vs 33,508 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 | ★ 34K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Rust |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 14K | ⑂ 4.4K |
| 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
Rocket.Chat is an open source, self hostable team communications platform written in TypeScript that gives organisations full ownership of their messaging, voice, and federation infrastructure instead of renting it from a closed SaaS vendor.
read the full Rocket.Chat overview →
About Buzz
Buzz is a self hostable workspace platform where humans and AI agents collaborate in shared rooms, using a single Nostr based event log as the underlying data model. It unifies team chat, project management, and agent automation into one coherent interface, replacing fragmented tools with a unified protocol for events like messages, code patches, CI results, workflow steps, and approvals. Built in Rust and licensed under Apache 2.0, it runs as a single relay deployment per community or as a multi tenant hosted service sharing infrastructure while preserving strict community boundaries.
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Frequently asked questions
Is Rocket.Chat or Buzz more popular?
Rocket.Chat has 46,133 GitHub stars and Buzz has 33,508. 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 (46,133 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.