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Buzz (Block)

Open-source (Apache-2.0) team chat workspace from Block, Inc. where people and AI agents share channels, DMs, canvases, git, workflows and huddles.

Visit buzz.xyz ↗@buzzdotxyz on X ↗

What Buzz (Block) does

Open-source (Apache-2.0) team chat workspace from Block, Inc. where people and AI agents share channels, DMs, canvases, git, workflows and huddles. You bring your own agent harness (Buzz's own agent by default, or Claude, Codex, Goose or Pi via ACP) with the model provider of your choice; agents run on your computer while the Buzz app is open and reply when @mentioned in a channel. Built on a Nostr relay, so every message is a signed event; communities can be hosted on buzz.xyz or on your own relay.

Good for

  • Dev teams working with coding agents in shared channels instead of copy-pasting between chat and agent windows
  • Self-hosted team chat where agent actions leave an audit trail
  • YAML workflows triggered by messages, reactions, schedules or webhooks

Try this in 10 minutes

  1. Dev teams working with coding agents in shared channels instead of copy-pasting between chat and agent windows. Use the free version: pick one real example from your own business and try just that.
  2. Self-hosted team chat where agent actions leave an audit trail. Put the result next to how you do it today. Is it faster, cheaper or better?
  3. YAML workflows triggered by messages, reactions, schedules or webhooks. Note what you had to fix by hand before you'd show it to a customer.

Mini-tasks based on common small-business uses for this tool.

Honest take

No red flags in our notes so far

  • For teams already using coding agents (Claude Code, Codex, Goose).
  • It is a team workspace, not a personal errand assistant: agents act when @mentioned and run on the member's own computer while the app is open.
  • Desktop app (Buzz 1.0 beta): macOS Apple Silicon (signed), Windows x64 (unsigned) and Linux; mobile app not released yet; no stable release channel yet (github.com/block/buzz-app).
  • Open source on GitHub: block/buzz (Apache-2.0, README footer 'Built by Block, Inc.') and block/buzz-app.
  • Agent harnesses: Buzz agent (default), Claude (needs a Claude account; macOS/Linux), Codex (ChatGPT/OpenAI account), Goose (Block's open-source agent, bundled; your own provider key) and Pi; any ACP harness.
  • Workflow approval gates are listed as still being wired up.
  • Self-hosting: run your own relay (engineering.block.xyz/blog/run-your-own-buzz-relay).

Compare

Personal AI agents compared: UK and EU availability, open source or hosted, bring your own model, approvals and price.

Pricing

Free and open source (Apache-2.0). Enterprise version: waitlist, no prices published (checked 29 Oct 2026).

Prices as listed by the maker when we last checked (2026-10-29); usually in US dollars. Check the website for current prices.

Latest update

  • 2026-10-29: Demo post: two people and an agent ('Forge') build an app together in Buzz channels; agents post directly in channels.
  • : Buzz, Block's open-source (Apache-2.0) team workspace where people and AI agents share channels, posted a launch demo of two people and an agent called Forge building an app together. You bring your own agent (Buzz's agent, Claude, Codex, Goose or Pi) and model provider; agents run on your own computer while the app is open and act when @mentioned. Desktop app is a 1.0 beta; enterprise version is waitlist-only with no published prices. Added to the new Personal AI agents comparison as a team tool.

Is Buzz (Block) worth it? Quick answers

Is Buzz (Block) worth it?

Buzz (Block) is worth a look if it matches a job you already do (Productivity & knowledge). For teams already using coding agents (Claude Code, Codex, Goose). It is free or open source, so the main cost is your time to set it up.

How much does Buzz (Block) cost?

Free and open source (Apache-2.0). Enterprise version: waitlist, no prices published (checked 29 Oct 2026).

What is Buzz (Block) used for?

Open-source (Apache-2.0) team chat workspace from Block, Inc. where people and AI agents share channels, DMs, canvases, git, workflows and huddles. Typical uses: dev teams working with coding agents in shared channels instead of copy-pasting between chat and agent windows; self-hosted team chat where agent actions leave an audit trail; YAML workflows triggered by messages, reactions, schedules or webhooks.