Let me break this down. Buzz is open source — Jack Dorsey’s AI-agent workspace is free, its code is public, and it’s built on the open Nostr protocol. That’s not a footnote; it’s the reason Buzz is worth betting on.
Here’s what Buzz being open source actually gets you.
Last updated: August 2026.
Key takeaways
Buzz is free and open source — the full project is on GitHub, built on the open Nostr protocol.
You only pay for model subscriptions you already have (Claude Code, Codex) — Buzz itself costs nothing.
Open source = no lock-in, extensible — the community is already wiring in agents like Hermes.
It comes from Block (Jack Dorsey’s company), alongside their open-source Goose agent.
Three concrete things. The app is free — no seat fees, ever. The code is public on GitHub — you can read it, run it and modify it. And it’s built on Nostr, an open protocol, rather than a proprietary backend someone can switch off or start charging for.
The only money involved is the AI models you bring — and those are subscriptions most users already pay for, connected without API keys.
Why Open Source Matters Here
No per-seat pricing — the thing that makes Slack painful at team scale simply doesn’t exist.
No lock-in — your workspace isn’t hostage to a vendor’s pricing decisions.
Extensible — take the repo and add what you need; I’ve had Claude modify it to support Hermes as a runtime.
Auditable — you can see exactly what agents can access, which matters when they hold keys.
Fast-moving — it’s about a week old and already shipping experimental features (workflows, polls, mobile pairing).
Open Source, But Polished
The pleasant surprise: Buzz doesn’t feel like a rough community project. The desktop app installs in minutes, the interface is Slack-familiar, and the agent workflows genuinely ship work — my agents wrote, QC’d and published a full blog post autonomously. You get open-source freedom with consumer-app polish, which is rare.
Part of an Open Stack
Buzz also plays nicely with the wider open ecosystem: Goose (Block’s open-source agent CLI) plugs straight in, Hermes (free, open source) connects via desktop, relay or gateway — see my Hermes + Buzz guide — and you can even share your machine so community members run agents on open models like Gemma 4. Free tools, composed into something genuinely powerful.
Open Source vs the Paid Alternatives
Compare the models. Slack charges per seat, forever, and its AI is a paid bolt-on. Closed AI workspaces charge subscriptions and lock your workflows to their roadmap. Buzz flips both: the software is free, the protocol is open, and the only spend is AI capacity you already own. For a tool your team lives in daily, that difference compounds every single month.
It’s the same logic that made me build my whole stack on open tools — Hermes, Goose, open models — and Buzz slots straight into that philosophy.
