Buzz block/buzz

Block's self-hostable workspace where people and AI agents share channels, threads, DMs, canvases, workflows and git, built on a Nostr relay.

Creator kit + Compare GitHub ↗ Install guide (official) ↗

Buzz at a glance

Checked 15 Oct 2026

Buzz (from Block, first released March 2026, Apache-2.0) is a team workspace built on a Nostr relay: channels, threads, DMs, canvases, media, search and an audit log work today, and AI agents join channels as members. It also has YAML workflows and git hosting. Desktop apps exist for macOS, Linux and Windows (unsigned alpha); mobile apps and push notifications are not ready yet. The relay needs Docker with Postgres, Redis and S3/MinIO; no hardware sizing is published. It is young and aimed at developer teams, not a drop-in Slack replacement.

Cite this pageRepoQuarry. “Buzz.” Checked 15 Oct 2026. https://repoquarry.dev/projects/buzz

How much of Slack does it replace?

4 of 5 jobs. Channels, threads, DMs, search and workflows work; mobile apps, push notifications and huddle lifecycle are still being built.

Channels and direct messages Partial replacement

Threaded conversations Partial replacement

Voice and video huddles Not covered

Integrations Partial replacement

Search and message history Partial replacement

For voice and video huddles, see other Slack alternatives. You may also need to build an interface, an API server and hosting yourself.

Facts, with sources

Every answer links to where we found it. We read the documentation; we did not install it.

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QuestionAnswerSourceChecked

Runs on my machine? Self-hosted relay (Docker Compose) plus desktop app; one-click Railway hosting optional Buzz is a self-hostable workspace where humans and AI agents share the same rooms. github.com · buzz#getting-started ↗ 1d ago

Code licence Apache-2.0 Apache License Version 2.0 github.com · LICENSE ↗ 1d ago

Model weights licence No separate model weights; agents use external tools such as Goose, Codex or Claude Code github.com · buzz#readme ↗ 1d ago

Commercial use Yes, Apache-2.0 Apache License Version 2.0 github.com · LICENSE ↗ 1d ago

Paid services needed? None required for chat; AI agent features need an agent and model provider of your choice; Railway hosting optional buzz-cli (agent-first, JSON in / JSON out) + ACP harness (Goose, Codex, Claude Code) github.com · buzz#readme ↗ 1d ago

Hardware Not documented Know the answer? —

Operating systems Desktop app for macOS (Apple Silicon and Intel), Linux (AppImage, deb) and Windows (unsigned alpha); relay runs in Docker The Windows build is not code-signed, so SmartScreen may show "Windows protected your PC" on first launch. github.com · buzz#i-just-want-to-try-the-app ↗ 1d ago

Setup effort Medium; production Compose bundle with Postgres, Redis and MinIO, or build from source with Rust, Node and Docker Use the production Compose bundle in deploy/compose/ (docker compose + Postgres, Redis, MinIO, optional Caddy/TLS). github.com · buzz#quick-start ↗ 1d ago