On July 21, 2026, Jack Dorsey, the co-founder of Twitter and Block (formerly Square), announced the launch of Buzz, a new group chat platform tailored for teams and their AI agents. Positioned as a direct competitor to Slack and GitHub, Buzz seeks to redefine workplace communication by integrating human and automated collaboration into one unified, open-source ecosystem. Built by Dorsey's company Block, which also operates Square, Cash App, Afterpay, and Tidal, Buzz represents a significant shift toward a decentralized, self-sovereign approach to enterprise software.

Dorsey announced the platform via a post on X (formerly Twitter), stating that Buzz is “model-agnostic, decentralized, self-sovereign, and open source.” The announcement quickly garnered attention from the tech community, with many viewing it as a natural extension of Dorsey's long-standing advocacy for open protocols and user control. Unlike mainstream platforms that rely on proprietary ecosystems, Buzz allows teams to host their own instances, modify the source code, and integrate with a wide range of AI models without vendor lock-in.

The Need for an AI-Native Workspace

The launch of Buzz comes at a time when startups and enterprises are increasingly relying on AI agents to automate tasks, generate code, manage data, and facilitate decision-making. However, most existing collaboration tools like Slack, Microsoft Teams, and Google Chat were designed primarily for human communication, with AI features added as afterthoughts or limited integrations. This often results in fragmented workflows: teams juggle separate channels for human chat, project management (e.g., GitHub), and AI interactions (e.g., ChatGPT, Copilot). Buzz aims to solve this by creating a single workspace where humans and AI agents can exchange messages, share files, and collaborate on projects in real time.

According to Block’s official website, Buzz is built on a decentralized architecture, meaning data is not stored on a central server owned by the company. Instead, each team controls its own instance and data, aligning with Dorsey’s broader vision of a “self-sovereign” internet. The platform supports multiple AI models simultaneously—users can choose from various providers or run their own local models—making it model-agnostic. This flexibility appeals to teams that need to comply with strict data privacy regulations or prefer specific AI tools for specialized tasks.

Features and Early Impressions

Buzz’s interface resembles Slack in many ways: channels, direct messaging, and thread-based conversations. However, the key differentiator is the native integration of AI agents as “team members.” These agents can be invited to channels, assigned tasks, and configured to respond to commands. For example, a developer could ask an agent to review a pull request, generate test cases, or analyze code from a linked GitHub repository—all within the same Buzz channel. Additionally, Buzz includes built-in project management capabilities that replicate much of GitHub’s functionality, such as issue tracking and version control, further reducing the need for third-party tools.

Dorsey emphasized that Buzz is open source, with the code available on GitHub from day one. This means developers can contribute to the project, audit the codebase, and deploy custom features without waiting for official updates. The app is currently in “early stages”—a fact Buzz itself acknowledges—so it’s not yet recommended for mission-critical workflows. The free desktop app supports macOS, Windows, and Linux, and a mobile version is reportedly in development.

Competition and Context

Dorsey is not alone in pursuing AI-native alternatives to Slack. Earlier in 2026, Paradigm partner and CTO Georgios Konstantopoulos unveiled Centaur, an open-source “virtual employee” that runs inside Slack or via an API. Centaur focuses on automating complex workflows, especially coding tasks, and can be self-hosted for security. Konstantopoulos noted that “there’s a lot of room for improvement for agents that live in Slack and can do more work than just coding for teams,” highlighting the growing interest in AI agents as integral workplace collaborators.

While both Buzz and Centaur are open source and target similar pain points, they differ in approach. Centaur is positioned as a plug-in for existing Slack environments, whereas Buzz aims to replace Slack entirely. For startups that have not yet standardized on a collaboration platform, Buzz offers a fresh, AI-first foundation. However, established organizations with deep Slack integrations may find it difficult to migrate. The fact that Buzz is in its early stages means it may lack some of the reliability, integrations, and third-party app ecosystem that Slack has built over more than a decade. Still, its open-source nature gives it the potential to evolve rapidly through community contributions.

Jack Dorsey’s Broader Vision

Buzz aligns with a pattern in Dorsey’s career: pursuing decentralization and user sovereignty. In recent years, he has been an outspoken critic of centralized social media and payment platforms, advocating for Bitcoin and the open web. His previous venture, Bluesky, an open-source social network protocol, similarly aimed to decentralize the social media landscape. With Buzz, he now turns his attention to enterprise collaboration, an area dominated by Slack (owned by Salesforce) and Microsoft Teams.

Block, the company behind Buzz, is primarily known for its fintech products. However, the addition of a workplace chat platform indicates a desire to expand beyond payments and into broader software infrastructure. Block also owns Tidal, the music streaming service, and has experimented with Bitcoin mining hardware and decentralized finance. Buzz could potentially integrate with Block’s existing products—for example, using Cash App for in-app payments or Square for merchant transactions—though no such integrations have been announced yet.

The platform’s “model-agnostic” stance is particularly significant given the current AI landscape. Large language models like GPT-4, Claude, Gemini, and open-source alternatives like Llama and Mistral are advancing rapidly, but enterprises often want the flexibility to choose or switch models without rewriting their systems. Buzz allows teams to bring their own models—or use default ones—without being tied to a single provider. This could appeal to privacy-conscious organizations that prefer to run models locally on their own hardware.

From a technical standpoint, Buzz is built using modern web technologies and adheres to the ActivityPub protocol, making it interoperable with other decentralized networks. That means in theory, a Buzz instance could communicate with a Mastodon server or another decentralized app, much like how email works across different providers. While it’s still early days for such cross-platform features, the architecture lays the groundwork for a more connected, user-controlled workplace.

Potential Challenges and Risks

Despite its promising vision, Buzz faces considerable hurdles. Slack has a massive user base and a mature app ecosystem, making it a sticky platform. Microsoft Teams is even more entrenched in enterprises that rely on Office 365. Convincing teams to switch requires not just comparable features but clear advantages. Buzz’s focus on AI agents and decentralization may be enough for some segments, but mainstream adoption remains a long shot. Moreover, the “early stages” warning suggests that Buzz may suffer from bugs, limited integrations, and a small developer community initially. Security and data integrity will be crucial: a decentralized, open-source platform puts great responsibility on the hosting team, which may not have the resources to manage enterprise-grade compliance and monitoring.

Another risk is the fragmentation of the user experience. Because every team can customize their own instance, there may be issues of inconsistency and compatibility between different Buzz deployments. While open-source advocates celebrate this flexibility, it can lead to a “choose your own adventure” confusion that hinders adoption. Dorsey and Block will need to provide strong documentation, templates, and support to help teams get started.

Availability and Next Steps

Buzz’s free desktop app is available now for macOS, Windows, and Linux. The source code has been uploaded to GitHub under an open-source license, inviting contributions from developers worldwide. Block has not announced a specific roadmap for new features or a mobile version, but the website indicates that updates will be frequent during the early phases. For teams curious about integrating AI agents into their daily workflows, Buzz offers a compelling sandbox to explore. However, as Buzz itself admits, it is in its “early stages,” so it’s probably not a good idea to port your entire team over just yet.

In the rapidly evolving landscape of workplace collaboration, Buzz represents a bold bet on a decentralized, AI-first future. Jack Dorsey has once again positioned himself at the intersection of technology, autonomy, and community-driven development. Whether Buzz will disrupt Slack remains to be seen, but it has already succeeded in sparking a conversation about what enterprise chat should look like when humans and AI agents work side by side.

Source: TechCrunch News