Jack Dorsey, co-founder of Twitter and Block, announced on July 21, 2026, the launch of Buzz, a new group chat platform designed for workplace collaboration that puts humans and AI agents in the same conversations. Buzz is positioned as a challenger to established tools like Slack and GitHub, offering a decentralized, open source alternative that Dorsey describes as “model-agnostic, decentralized, self-sovereign, and open source.” The platform was built by Dorsey's company Block, which also operates Square, Cash App, Afterpay, and Tidal.

What is Buzz?

Buzz is a group chat application that merges multiple workflows into one workspace. It looks and functions similarly to Slack but includes native AI agents that can assist with tasks ranging from code review to project management. The platform also integrates with GitHub, allowing teams to manage repositories, issues, and pull requests directly from the chat interface. By combining communication with AI-driven automation, Buzz aims to reduce the friction of switching between different tools.

According to Dorsey's announcement on X (formerly Twitter), Buzz is “model-agnostic,” meaning it can work with various AI models, not just one proprietary system. This flexibility allows teams to choose the AI that best fits their needs, whether it's an open source model like Llama or a commercial one from OpenAI or Anthropic. The decentralized nature of Buzz means that data is not stored on a central server controlled by a single company; instead, teams can self-host their own instance, giving them full control over security and privacy.

Key Features and User Experience

At its core, Buzz provides a familiar chat interface with channels, direct messages, and threads. The key differentiator is the seamless integration of AI agents. These agents can be invited to channels like any human user and can perform tasks such as summarizing discussions, generating code, answering questions, or automating workflows. For example, a development team could have an AI agent monitor a GitHub repository and automatically post updates when a build fails or a pull request is ready for review.

The platform also supports file sharing, video calls, and integrations with other tools via APIs. Because Buzz is open source, developers can extend its functionality by writing custom plugins or modifying the codebase. The desktop app is available for macOS, Windows, and Linux, and the source code has been uploaded to GitHub for community contributions.

Open Source and Customization

One of Buzz's most compelling aspects is its open source license. Teams are not locked into a proprietary platform; they can deploy Buzz on their own servers, audit the code for security vulnerabilities, and modify it to suit their specific workflows. This approach aligns with Dorsey's long-standing advocacy for decentralization and open protocols. In the past, he has criticized the centralization of social media and payment systems, and Buzz represents an attempt to apply those principles to workplace communication.

For companies with strict data governance requirements, self-hosting Buzz provides a way to keep sensitive information within their own infrastructure. The open source nature also encourages a community of developers to contribute improvements, bug fixes, and new features, potentially accelerating the platform's evolution.

Competition and Context

Buzz enters a market dominated by Slack, which has become the de facto standard for team communication in many organizations, and Microsoft Teams, which is bundled with Office 365. However, the rise of AI agents has created new opportunities for innovation. Slack itself has introduced AI features, but Buzz offers a deeper integration by allowing AI agents to function as full-fledged members of the conversation rather than just add-ons.

Dorsey is not alone in this space. Georgios Konstantopoulos, CTO at venture capital firm Paradigm, unveiled a similar open source product called Centaur in May 2026. Centaur is described as a “virtual employee” that can operate inside Slack or via an API, performing tasks beyond coding. Konstantopoulos argued that there is “a lot of room for improvement for agents that live in Slack and can do more work than just coding for teams.” Both Buzz and Centaur reflect a growing trend: as startups increasingly rely on AI agents to handle routine tasks, the platforms that host these agents need to evolve.

The timing of Buzz's launch is also significant. The AI industry has seen explosive growth in the development of autonomous agents, with companies like Salesforce, Microsoft, and Google investing heavily in AI-powered assistants for the enterprise. However, many of these solutions are tied to proprietary ecosystems. Buzz's open source, model-agnostic approach could appeal to organizations that want to avoid vendor lock-in and maintain flexibility in their AI strategy.

Jack Dorsey's Vision

Jack Dorsey has a history of championing open protocols and decentralized technologies. He was an early proponent of Bitcoin and blockchain, and he helped fund research into decentralized social media protocols like Bluesky, which later spun off as an independent project. With Buzz, Dorsey appears to be applying similar ideals to workplace communication. The phrase “self-sovereign” he used in his announcement suggests that users should have control over their data and identity, rather than ceding it to a centralized provider.

Block, the company behind Buzz, is known for its financial technology products but has also ventured into music streaming with Tidal. The development of Buzz represents Block's expansion into productivity software, leveraging its engineering resources to tackle a market that has remained largely static for years. Given Dorsey's influence and the Block brand, Buzz may attract attention from developers and early adopters who share his philosophical leanings.

However, Buzz faces significant hurdles. Slack has a massive installed base and deep integrations with thousands of business tools. Switching costs are high for teams that have built custom workflows around Slack's API and ecosystem. Buzz is currently in “early stages,” as noted on its website, so it may lack the polish and reliability that enterprise customers require. Dorsey's announcement itself acknowledged that Buzz is a work in progress, advising teams not to port over their entire operations just yet.

The free desktop app is available now, but a mobile version or web client has not been announced. This could limit adoption among teams that need to collaborate on the go. Additionally, the platform's success will depend on the community's ability to build a robust ecosystem of integrations and plugins. Without widespread community support, Buzz might remain a niche tool for tech-savvy teams.

Despite these challenges, the launch of Buzz signals a shift in how work tools are conceived. The integration of AI agents as first-class participants in team chat is a logical next step as artificial intelligence becomes more capable. Buzz offers a glimpse of a future where humans and AIs collaborate seamlessly, with the open source model ensuring that this future is not controlled by a single corporation.

As the workplace continues to evolve, tools like Buzz and Centaur will likely proliferate, each offering different trade-offs between ease of use, control, and functionality. For now, Buzz is a promising experiment that reflects its creator's ideals and the changing demands of modern teams. The platform is free to use and open for contributions, inviting the developer community to help shape its direction.

Source:TechCrunch News