# Buzz (Block)

Block’s open-source, Nostr-based collaboration workspace where humans and AI agents are first-class members with portable cryptographic identities. Public launch 2026-07-21 (buzz.xyz / github.com/block/buzz); positioned to reduce dependency on Slack and GitHub.

Tags: product, block, jack-dorsey, nostr, agents, open-source, workspace, bitcoin-adjacent

## Summary

Buzz combines team chat (channels, threads, DMs, voice), early git hosting/forge, YAML workflows, and agent orchestration on a self-hostable Nostr relay. Agents hold their own secp256k1 keypairs and sign their own work under a human owner’s scoped authorization. Apache-2.0; desktop apps for macOS/Windows/Linux; Block-hosted communities free as developer preview (not E2EE).

## What it is

- **Protocol + app:** Rust Nostr relay (single source of truth) + Tauri desktop client + Flutter mobile (in progress) + `buzz-cli` / ACP harness.
- **Not:** a crypto token, a Bitcoin wallet, Google Buzz (2010–2011), or a federated multi-relay mesh (relays do not sync).
- **Thesis:** AI made individual work faster and teamwork slower; coordination needs a shared room for humans + agents.

## Product surface

- Channels, threads, DMs, reactions, canvases, media, search, presence
- Voice huddles (recording not yet)
- YAML workflows (approval gates incomplete per ARCHITECTURE.md)
- Early forge / Git Smart HTTP; branch-as-room vision
- Agents: goose, Claude Code, Codex via Agent Client Protocol; personas/teams
- MeshLLM: optional community shared inference compute

## Architecture (high level)

- Wire: Nostr NIP-01; auth NIP-42 / NIP-98; git NIP-34
- Infra: Postgres (events + FTS), Redis (pubsub/presence), S3/MinIO (media + git packfiles)
- Access control: channel membership is the ACL
- Documented gaps: rate limiting unenforced; approval gates fail instead of waiting; audit chain tamper-evident not tamper-resistant (see primary SECURITY/ARCHITECTURE)

## Block / bitcoin portfolio relationship

| Piece | Relation |
|-------|----------|
| goose | Prior agent framework; native Buzz harness |
| BuilderBot | Internal agent dogfooding Buzz (press) |
| Cash App / Square / Afterpay / Tidal | Same company; no confirmed Buzz integration |
| Bitkey / Proto / Spiral | Bitcoin stack — thematic open-protocol alignment only |
| TBD | Prior decentralized unit (reported shuttered); not a Buzz relaunch |
| Lightning agent payments | **Speculation** (press); not a Block product claim |

## Timeline

- 2026-03-06 — repo created (secondary citing GitHub)
- 2026-05-03 — public releases begin (secondary)
- 2026-07-21 — public launch (primary)
- 2026-07-31 — self-host relay guide (primary)
- 2026-08 — mobile / MeshLLM posts; continued shipping

## Key people

- Jack Dorsey — public launch announcer
- Bradley Axen — Head of AI Capabilities; primary product voice; goose author
- Lucas Isaza — AI/product commentary (press)
- Thomas Petersen — design / AI strategist (press)

## Competitive landscape

- Incumbents: Slack, Microsoft Teams, GitHub/GitLab
- Peer fork: Centaur (agents inside Slack) vs Buzz (replace workspace)
- Watch metrics: third-party self-hosted relays; OSS communities hosting forges on Buzz

## Confirmed vs rumor

**Confirmed:** Block product; Nostr; Apache-2.0; agent keypairs; ACP harnesses; free hosted preview; not E2EE hosted; single-relay SSoT; Axen open-vs-proprietary quote.

**Rumor/speculation:** Lightning payments for agents; “Slack killer” outcomes; BuilderBot production-% figures from press.

**Unknown:** dedicated org size/budget; hosted pricing post-preview; 1.0 date; Cash App/Bitkey integration plans; independent audits.

## Open questions / risks

1. Maturity of safety controls (rate limits, approvals) vs agent-swarm pitch
2. Hosted privacy vs sovereignty marketing
3. Business model after free beta
4. Real external adoption beyond Block dogfooding
5. Overloading “decentralized” (sovereignty ≠ mesh redundancy)

## Related

- raw/`buzz-block-2026-08-12/`
- summaries/`buzz-block-2026-08-12.html`

## Sources

- https://block.xyz/inside/introducing-buzz-where-humans-and-agents-work-together
- https://engineering.block.xyz/blog/buzz
- https://engineering.block.xyz/blog/run-your-own-buzz-relay
- https://engineering.block.xyz/blog/a-buzz-on-your-phone
- https://github.com/block/buzz
- https://raw.githubusercontent.com/block/buzz/main/ARCHITECTURE.md
- https://block.github.io/buzz/support.html
- https://techcrunch.com/2026/07/21/jack-dorsey-is-taking-on-slack-with-buzz-a-group-chat-platform-for-teams-and-their-ai-agents/
- https://decrypt.co/374026/jack-dorseys-block-launches-buzz-a-nostr-based-slack-and-github-rival-for-ai-agents
- https://sdtimes.com/open-source-ai/block-rolls-out-buzz-ai-collaboration-workspace/
- https://www.tftc.io/buzz-block-nostr-ai-agent-workspace-launch
- https://www.digitalapplied.com/blog/block-buzz-self-hosted-agent-workspace-open-source