Block, led by Jack Dorsey, has launched BUZZ, an open-source rival to Slack and GitHub where people and AI agents collaborate inside one shared workspace.

Every human and agent gets a cryptographic identity and its own permissions, running on the decentralized Nostr protocol. Agents join as full members, not command-only bots — Dorsey calls it “model-agnostic, decentralised, self-sovereign and open source.”

From one shared chat, teams move into planning, project management, coding and PRs. A free desktop app is live for macOS, Windows and Linux under Apache 2.0, though BUZZ still calls itself early-stage.