Block launches Buzz, an open-source platform for teams and AI agents

Block has launched Buzz, a free open-source platform where employees and AI agents work in a single workspace, Block CEO Jack Dorsey said.

we’re launching BUZZ!

a new groupchat platform for teams of people and agents of all sizes, built to reduce our dependency on slack and github. model-agnostic, decentralized, self-sovereign, and open source. 🐝https://t.co/8IaMVeTQNo

— jack (@jack) July 21, 2026

The service is built on the open Nostr protocol and combines team chats, direct messages, voice, file sharing, code repositories, and automated workflows.

Dorsey described Buzz as a platform for teams of people and agents of any size that should reduce Block’s reliance on Slack and GitHub. The current version is still early: mobile apps are not ready, and some code and automation features are still in development.

AI agents get separate accounts

In Buzz, agents are more than chatbots responding to commands. Each has its own cryptographic identity, access rights, and activity history.

An agent can be added to a channel like an employee. It can join discussions, access project history, work with repositories, review code, and run authorized automated processes. Messages, reactions, changes, process results, and confirmations are recorded as signed events. This makes it possible to determine which actions were performed by a person and which by a specific agent.

Permissions are configured separately. For example, an agent can be allowed to read selected channels and review code without access to the entire workspace or the company’s internal infrastructure. Buzz is not tied to a single language model or agent system and supports Claude Code by Anthropic, Codex by OpenAI, as well as Block’s goose framework.

Integration uses the Agent Client Protocol (ACP), an open protocol for AI agents to interact with code editors, development environments, and available tools. Custom models and systems can be integrated.

Each workspace depends on a single relay

Buzz’s stated decentralization has a limitation. In the current architecture, each workspace uses one relay, which the repository calls the single source of truth for the system state. Messages, access rights, repositories, workflows, and the history of a given community are served through it.

As a result, decentralization mainly applies to key ownership, the open protocol, the ability to choose an operator, and self-hosting. The internal infrastructure of an individual workspace remains centralized around the chosen relay.

A single operator can serve multiple separate communities. According to the documentation, their data, search indexes, logs, and workflow states must be stored separately. With self-hosting, an organization controls the server and data handling. Users of the managed version depend on Block’s infrastructure.

Some features are still in development

The Buzz repository explicitly calls it an unfinished product. The platform is available as a desktop app for macOS, Windows, and Linux. At the time of the announcement, the latest published release was version 0.4.22.

Channels, discussions, direct messages, search, a shared event log, file sharing, Git repositories, and processes triggered by messages, reactions, schedules, or external events are already functional. Mobile apps for iOS and Android are not yet available.

In January 2025, Block introduced an open-source framework for building AI agents called goose. Such agents can work with files, the browser, repositories, and other connected tools. According to the company, its engineers used goose to automate part of their software development tasks.

Buzz is intended to bring such agents together with employees, code, decision histories, and workflows in one environment. The company did not disclose the number of internal users of the platform or data on its impact on productivity.

In February 2026, it was reported that Block planned to cut up to 10% of staff as part of a large-scale restructuring. Dorsey later said that nearly 4,000 employees would lose their jobs. He linked the decision to the firm’s move to a “smaller, flatter, and AI-focused” structure.

Following the announcement, Block’s shares, which had closed the regular session at $54.53, jumped more than 20% in after-hours trading. Its market capitalization was estimated at $31 billion. At the time of writing, the stock trades at $80.38.

In March, Block reinstated some of the employees laid off in February. Dorsey said that while artificial intelligence may play an important role in the company’s proposed model, people will continue to make key business and ethical decisions.

In June, Block introduced the AI tool Builderbot to automate software development. The system already generates about 15% of the company’s code.

In July 2025, Dorsey introduced a beta version of the decentralized messenger Bitchat. The app works over Bluetooth without an internet connection.