Buzz is a self-hosted team workspace where people and AI agents share the same rooms. Built by Block on a Nostr relay event log, it combines team chat, file and media sharing, git-backed code collaboration, and workflow automation in one signed, searchable history. It serves teams that want agents to work visibly inside real conversations, under their own identities, rather than hidden behind side panels and bot tokens.[1][2]
Quick verdict
Teams that want AI coding agents as visible, accountable room members will get the most from Buzz. Its agent keypairs, owner signatures, and model-agnostic ACP support make agent work inspectable in the same history as human discussion. Teams that need polished mobile apps, finished approval gates, or predictable hosted pricing today should wait or choose something else. If your team pairs developers with coding agents and can self-host a relay, trial Buzz; if you need a finished no-code workspace now, keep Slack.[1][2][3]
Key features
Nostr relay event log Every conversation persists as a signed, searchable history on a Nostr relay your team controls, replacing a vendor-held message database with portable rooms.[1][2]
Agents as room members Agents join channels with their own Nostr keypairs and memberships, so their messages, patches, and reviews appear in context instead of arriving through a bot integration.[1][2]
Owner-signed agent work Each agent contribution carries a dual signature from the agent and its owner, keeping accountability visible when agents act in shared rooms.[1][2]
Model-agnostic agent support The open Agent Communication Protocol connects Claude Code, Codex, goose, and other compatible agents without locking rooms to a single model.[1]
Built-in git forge Branches behave like channels, and patches, CI results, and reviews accumulate in one record, keeping code discussion next to the code it concerns.[1][2]
Workflow automation Built-in workflows and automation handle recurring team processes such as standups and review routing from inside the workspace.[1][2]
Desktop apps and agent CLI Native apps ship for macOS, Windows, and Linux alongside a web client, and buzz-cli installs via npm or Homebrew for JSON-first agent scripting.[1]
Self-hosted or hosted relay Teams run their own relay for data sovereignty or use Block's hosted relay, free while in beta, with device pairing and local-first sync across clients.[1][2]
Who will love it
Developers pairing with Claude Code, Codex, or goose get agent work surfaced in the rooms where decisions happen, signed and reviewable.[1][2]
Organizations that want conversation and code history on infrastructure they control can run their own relay under Apache-2.0 with no license fee.[1][2]
Teams whose incident response and code review constantly jump between chat and forge get both contexts in one signed, searchable record.[1]
Who should avoid it
Native mobile clients were still pending at launch, so teams that coordinate primarily from phones will find Buzz incomplete.[1]
Human approval checkpoints for agent actions were unfinished at launch; teams with strict change-control requirements should verify current status before adopting.[1]
Block had disclosed no commercial pricing at launch beyond a free hosted beta, so budget planners cannot yet cost a managed deployment.[1]
Compatibility and alternatives position
Questions worth asking
What is the best Buzz alternative for non-technical users?
Is Buzz really no-code?
No. Everyday chat needs no code, but workflow automation is configuration work and running a relay is infrastructure operations. Non-technical teams will need developer help to get full value from Buzz.[1]
How much does Buzz cost per month?
Sources and editorial review
Source research. Reviewed on October 9, 2026. Written by Sanjib Sah. AI assisted; reviewed by a human editor.
We have not run or tested this product.
- Buzz! | Block Engineering Blog
official · Observed October 9, 2026
Launch announcement by Block engineering: why Buzz was built, relay model, agent keypairs and ownership, ACP support, git-forge workflow, GPU sharing, open protocol.
- GitHub - block/buzz: A hive mind communication platform
official · Observed October 9, 2026
Repository README: install paths, feature list, architecture, self-hosting and license facts.
- Buzz - Team Communication With AI Agents
official · Observed October 9, 2026
Official marketing site: positioning tagline and early-stage notice.
- Block launches Buzz, an open-source workspace for humans and AI agents
published measurement · Observed October 9, 2026 · Published July 21, 2026
Independent launch report: launch date, version at launch, Slack/GitHub positioning, hosted-vs-self-host facts, unfinished items, undisclosed pricing. Cited for launch and positioning facts; not a benchmark.