Jack Dorsey’s Block Launches Buzz AI Collaboration App

Block, led by Jack Dorsey, has introduced a new communication app named Buzz, specifically designed to support both human employees and third-party AI agents within a unified shared platform. Launched on July 21, 2026, the application aims to reduce enterprise reliance on traditional communication silos like Slack and GitHub. The platform is model-agnostic, decentralized, and open-source, allowing developers to host their own instances while integrating diverse agentic AI workflows into one workspace.

Buzz aims to solve the fragmentation problem currently faced by businesses that use multiple AI agents across disjointed tools. The app includes features such as threaded discussions, direct messaging, voice capabilities, and integrated code repositories. According to Block, Buzz is intended to serve as a hub where AI agents can function alongside human teams to automate complex tasks. The platform's open-source nature means companies have full access to the underlying code, enabling deep customization to fit specific organizational needs.

While Dorsey, a veteran of social communication platforms, is positioning Buzz as a next-generation workspace, it faces significant competition from established incumbents like Salesforce’s Slack. The app's arrival coincides with a strategic shift at Block toward an AI-driven operating model, which included a significant workforce reduction earlier this year. As Buzz is still in its early development phase, its long-term viability will depend on its ability to convince large enterprises to migrate away from existing, deeply embedded communication infrastructure. The platform is currently available as a free desktop application for macOS, Windows, and Linux, with the source code publicly hosted on GitHub.