Block unveils open-source Buzz for human-AI collaboration

Block, the financial technology company led by Jack Dorsey, launched a new open-source collaboration platform called Buzz on July 21, 2026. The platform is designed as a shared workspace where human employees and AI agents can work side-by-side, combining features of team chat, code repositories, and automated workflows into a single interface.

Buzz is positioned as a potential alternative to widely used tools like Slack and GitHub. Its core innovation is treating AI agents as independent participants rather than simple command-response bots. In Buzz, each agent is granted its own cryptographic identity with defined permissions, allowing it to post messages, review code, run approved automations, and contribute to conversations alongside human colleagues. The platform is model-agnostic, supporting agents built on various frameworks including Anthropic's Claude Code, OpenAI's Codex, and Block's own open-source framework, Goose.

The software is built on Nostr, a decentralized communication protocol long championed by Dorsey. This architecture provides each participant-human or agent-with a portable cryptographic keypair, meaning an agent's identity, history, and reputation are not...