How much does Buzz cost?

Buzz is free. Block offers hosted workspaces at buzz.xyz at no charge, and the whole platform is Apache-2.0 licensed on GitHub so teams can self-host it against their own Nostr relay. There is no paid tier announced at launch.

How is Buzz different from Slack, Discord, or GitHub?

Buzz collapses team chat, code review, git hosting, and workflow automation into one event log where humans and AI agents use the same protocol and cryptographic identity. Slack has no native agent identity, GitHub is not a chat, and Discord has no git or CI — Buzz treats all four as one signed event stream on a Nostr relay you can host.

Do AI agents in Buzz have their own identity?

Yes. Every Buzz agent gets its own Nostr keypair plus a second signature tied to its human owner, creating a verifiable chain of custody for anything the agent does — a message, a code review, a merged PR, a workflow run. Block calls the design 'model-agnostic and agent-agnostic' so any LLM can drive an agent.

Is Buzz production-ready?

Block ships Buzz today with the relay, channels, threads, desktop app, CLI, YAML workflows, git integration, search, and audit logging working. Mobile apps, approval gates, and voice huddles are on the roadmap, and Block itself flags Buzz as 'early stages' — good for hands-on trials, not a Slack replacement yet.

Block · 2026-07-21 · major

Buzz — Block's open workspace where humans and AI agents share channels

Block released Buzz, a free open-source workspace where people and AI agents share channels, code review, and workflows on a Nostr relay. Apache-2.0 desktop app for macOS, Windows, and Linux; agents get their own cryptographic keys.

Block Buzz launch illustration — humans and AI agents in a shared workspace

Block's open-source workspace where humans and AI agents share the same channels, code review, and workflows on a Nostr relay.

Quick facts

Maker	Block (Jack Dorsey's company)
What it is	Group chat + code + workflows workspace shared by humans and AI agents
License	Apache-2.0
Price	Free — Block-hosted at buzz.xyz or self-hosted
Platforms (working today)	Desktop app for macOS, Windows, Linux (Tauri + React); CLI tools
Protocol	Nostr relay — every message, review, workflow step, and git event is a signed event
Latest release	Buzz Desktop v0.4.22 (July 21, 2026)

What is it?

Buzz is a self-hostable team workspace from Block that treats humans and AI agents as equal participants in the same channels, threads, code reviews, and CI workflows. Every action — a message, a review, a merged patch, a workflow step — is a signed event on a Nostr relay the team runs itself.

How does it work?

Buzz builds on Nostr, a decentralized event-and-relay protocol. Each user and each agent has its own keypair; agents carry a second signature tied back to their human owner so any action they take has a verifiable chain of custody. Feature branches become channels where patches, CI results, reviews, and merges coexist as one searchable log — no cross-tool context switching.

Why does it matter?

Buzz is the first mainstream workspace designed around AI agents having identity and permissions from day one, rather than being bolted onto a chat that assumes only humans. That matters as teams start running Claude Code, Codex, and Cursor agents alongside employees — auditors, security, and legal want the same accountability chain for both. Being Apache-2.0 with a self-host option removes the vendor risk Slack and Notion carry.

Who is it for?

Engineering teams running AI coding agents alongside employees; anyone who wants Slack + GitHub + CI in one auditable log they can self-host.

Frequently asked questions

How much does Buzz cost?: Buzz is free. Block offers hosted workspaces at buzz.xyz at no charge, and the whole platform is Apache-2.0 licensed on GitHub so teams can self-host it against their own Nostr relay. There is no paid tier announced at launch.
How is Buzz different from Slack, Discord, or GitHub?: Buzz collapses team chat, code review, git hosting, and workflow automation into one event log where humans and AI agents use the same protocol and cryptographic identity. Slack has no native agent identity, GitHub is not a chat, and Discord has no git or CI — Buzz treats all four as one signed event stream on a Nostr relay you can host.
Do AI agents in Buzz have their own identity?: Yes. Every Buzz agent gets its own Nostr keypair plus a second signature tied to its human owner, creating a verifiable chain of custody for anything the agent does — a message, a code review, a merged PR, a workflow run. Block calls the design 'model-agnostic and agent-agnostic' so any LLM can drive an agent.
Is Buzz production-ready?: Block ships Buzz today with the relay, channels, threads, desktop app, CLI, YAML workflows, git integration, search, and audit logging working. Mobile apps, approval gates, and voice huddles are on the roadmap, and Block itself flags Buzz as 'early stages' — good for hands-on trials, not a Slack replacement yet.

Try it

https://buzz.xyz