Buzz unites team chat, AI agents, and Git hosting in a self-hosted workspace
Buzz could reshape enterprise collaboration by combining chat, AI agents, and code workflows in an open-source, self-hosted platform that aims to reduce dependence on Slack and GitHub.
At a glance
- Buzz is built around a self-hostable Nostr relay with cryptographically signed events for all messages and actions.
- Buzz combines channels, threads, direct messages, shared canvases, and a built-in software forge with Git workflow support.
- Desktop builds are available for macOS, Windows, and Linux; latest release is 0.4.21 (July 21) and the project is Apache 2.0 licensed.
- Buzz is described as decentralized and self-sovereign, but Block’s architecture notes that reads/writes pass through a single relay rather than full peer-to-peer replication.
The story
TechCrunch reports that Jack Dorsey announced Buzz, a new app from Block, on July 21, 2026. Buzz is described as a group chat platform for teams and their AI agents, designed to reduce dependence on Slack and GitHub.
Dorsey characterized Buzz as model-agnostic, decentralized, self-sovereign, and open source, and Block’s own documentation shows Buzz is built around a self-hostable Nostr relay where messages and actions are cryptographically signed and tied to a shared identity system.
According to coverage, Buzz enables teams to manage chats, code hosting, and workflows in one workspace, with agents that can search discussions, open repositories, submit patches, review code, and run workflows. The project includes an agent-oriented CLI and adapters for Codex and Claude Code, keeping the model choice separate from the workspace.
Buzz offers a built-in software forge for Git with a standard Git workflow; a feature set includes channels, threads, direct messages, shared canvases, media, and an audit log. Desktop clients are available for macOS, Windows, and Linux, and the repository is licensed under Apache 2.0. The latest desktop release, version 0.4.21, shipped on July 21 and includes updates to authentication and onboarding.
TechCrunch notes that Buzz is still unfinished, with mobile clients in development and ongoing work on evaluation gates and execution paths. Block positions Buzz as a broad platform intended to replace portions of Slack, GitHub, and related tools by unifying those surfaces under one event system.
RuntimeWire’s coverage adds that Buzz emphasizes self-hosting, permitting organizations to run their own relay and retain control over data and identity, while keeping centralized access points for governance and security.