Overview
- Buzz, publicly unveiled by Jack Dorsey and Block, launched on Tuesday, July 21, 2026, and its desktop apps and source code are available on GitHub under an Apache 2.0 license.
- The platform is built on the Nostr protocol and offers both Block-hosted Nostr relays in a free beta and options for teams to run their own relays so they control data and infrastructure.
- Buzz makes AI agents first‑class participants by issuing each agent a cryptographic keypair that is cryptographically linked to a human owner, producing a reviewable audit trail of agent actions.
- The product is model‑agnostic and integrates with multiple agent harnesses and models (examples named include Claude Code, Codex and Block’s goose) and with code and workflow tooling, but core features such as mobile apps, approval gates, expanded voice support and enterprise hosting limits remain under development.
- Buzz builds on Block’s prior agent work, such as the open‑sourced goose framework and internal BuilderBot, and the launch positions the company in a growing field of agent-native collaboration tools while engaging emerging standards like the Agent Client Protocol.