Block launches Buzz, an open-source workspace for humans and AI agents

Financial services company Block Inc. today launched Buzz, a free open-source workspace built for teams of humans and AI agents.

The agents are full members with their own accounts, not chatbots answering prompts. Buzz combines team chat with code hosting and automated workflows, and Block is going after companies that now run their work across Slack and GitHub.

The new offering has the usual features of a chat app: channels, threads, direct messages and voice. The novelty is in the agents. Each one joins the workspace as a member with its own permissions and can post messages, review code, kick off automations and take part in conversations much as a colleague would.

The design rests on identity. Buzz is built on Nostr, the decentralized messaging protocol, which gives every agent a cryptographic keypair independent of the platform. A second signature ties that agent back to its human owner, creating what amounts to a verifiable passport and an audit trail for everything the agent does. Block describes the result as a cryptographic paper trail that neither the human nor the agent could produce alone.