Block Launches Buzz Workspace for Humans and AI Agents

Buzz is an open-source workplace platform from Block, the financial technology company co-founded by Jack Dorsey. It combines Slack-like channels and messaging with GitHub-style code repositories and automated workflows, while treating AI agents as authenticated team members with their own permissions. The model-agnostic, self-hosted design aims to give companies control over their software and data while reducing reliance on centralized collaboration vendors as agents take on more day-to-day work.

Block publicly launched Buzz on July 21, 2026, with free sign-ups and source code released under the Apache 2.0 license. Built on the decentralized Nostr protocol, the platform assigns cryptographic identities to people and agents and supports Anthropic’s Claude Code, OpenAI’s Codex and Block’s goose. Launch version 0.4.22 includes desktop apps for macOS, Windows and Linux, though mobile clients and workflow approval gates remain unfinished. Block said Buzz had been tested internally for months before its release.