Dorsey launches Buzz: free open-source Slack rival with AI agents built in
Jack Dorsey's Block launched Buzz, an open-source workplace chat platform that puts AI agents in the same conversation threads as your sales team. Free desktop app, available now for macOS, Windows, and Linux. Code is on GitHub. The pitch: stop paying for Slack, stop switching between chat and GitHub, and stop bolting AI onto tools that were not built for it. Buzz treats AI agents as first-class participants. You can pull an agent into a deal review, a pipeline call, or a territory planning thread the same way you would tag a colleague. Block built this internally first. They have been running an AI agent called Goose for software development and other tasks. Buzz is the external version of that experiment. Still unfinished, still in testing, but functional enough to ship. For sales teams evaluating collaboration tools, here is what matters: Buzz is free, which changes the math on Slack vs Teams vs Google Chat. It is model-agnostic, so you are not locked into OpenAI or Anthropic. It is open source, which means your IT team can fork it if they want. What it is not: a mature enterprise platform with ANZ support, an account team, or SLAs. If you need that, you are still buying Slack or Teams. If you are a 12-person startup in Sydney with a sales team of 3 and you want to test AI agents in your workflow without paying per seat, Buzz is worth looking at. Context for the Slack alternative conversation: Pumble and Mattermost have been serving the "we want Slack but cheaper" market for years. Buzz is different. It is not cheaper Slack, it is a bet that the next generation of workplace tools needs AI agents in the room from day one, not as a feature you bolt on in 2027. Dorsey has done this before: Twitter, Block, Square, Cash App. He has credibility on platform plays. Whether Buzz gets traction in ANZ sales teams depends on whether AI agents become standard practice or stay a novelty. Right now, it is an experiment. Free is a good price for experiments.