Jack Dorsey launches Buzz to combine team chat, AI agents and Git hosting

Jack Dorsey (@jack) said in an announcement on X on July 21st that Block is launching Buzz, an open-source workspace that puts employees, AI agents, conversations, and software repositories behind one identity system. Dorsey, Block’s cofounder and Block Head, is positioning Buzz as a way to cut Block’s reliance on Slack and GitHub by folding team chat, agent activity, and Git hosting into a single product.

Buzz’s architecture bet is shared identity plus signed events. Instead of treating agents as bolt-on tools that act under scattered accounts and opaque logs, the design aims to make them first-class participants whose actions sit on the same identity layer as human teammates. Conversations, repositories, and agent workflows share that layer so activity can be attributed, audited, and coordinated in one place rather than reconstructed across vendor-specific systems.

For engineers and builders, the practical shift is operational, not cosmetic. Software work already spans chat threads, pull requests, automation, and agent runs; when those live under separate vendors, handoffs break and accountability gets fuzzy. A workspace that unifies identity across people, agents, chat, and repos is a direct attempt to make agent-driven development inspectable and governable inside the same loop teams already use to ship code.

The competitive frame is clear: Slack owns day-to-day team chat and GitHub owns hosting and collaboration for source code, and most organizations accept that split. Buzz takes Dorsey’s preference for open protocols into that stack and offers an open-source alternative aimed at reducing multi-vendor lock-in. It also matches the model he has been pushing inside Block, including in an essay with Sequoia Capital’s Roelof Botha, where he argued that AI should change how organizations coordinate, not only speed up individual tasks.

Buzz turns that agent-centered thesis into a product others can inspect and run. The key claim to test is whether shared identity and signed events are enough to make agents accountable participants in real software work, not just chatbots with repo access. Watch whether teams adopt it as a Slack-and-GitHub substitute in daily engineering workflows, and whether open-source identity and event signing hold up under multi-team, multi-agent load.