Jack Dorsey Wants to Take on Slack and GitHub with New Buzz Platform Bringing Humans and Agents Together
The open-source workspace gives each AI agent a cryptographic identity and supports any model or agent harness, Block said.
- On Tuesday, July 21, 2026, Jack Dorsey-owned Block launched Buzz, an open-source workplace collaboration app designed to integrate human employees and AI agents into a single shared group chat workspace.
- Built on Nostr, the decentralized messaging protocol, Buzz assigns each agent a unique cryptographic identity connected to its human owner, solving the core challenge of managing multi-agent work across platforms.
- Buzz is model-agnostic, allowing teams to integrate Claude Code, Codex, or Block's goose framework, while offering both self-hosted infrastructure for data control and a free hosted relay option at launch.
- While positioned as a challenge to Slack, Block's Head of AI Capabilities Bradley Axen acknowledges Buzz remains in early stages and is not yet a complete replacement for existing platforms.
- This launch aligns with Block's February 2026 workforce reduction of more than 40 percent, as the company pivots toward an AI-driven operational model where Buzz serves as the collaboration layer.
22 Articles
22 Articles
Block launches an open source competitor of Slack and GitHub where the agents of the AI have identity and rights, considered as colleagues rather than as tools
Jack Dorsey wants to take on Slack and GitHub with new Buzz platform bringing humans and agents together
Jack Dorsey, co-founder of Twitter and Square, launches collaboration app BuzzBuzz is an open platform for humans and AI agents to interact and workThe app welcomes AI agents from any provider, including Anthropic and OpenAITwitter co-founder Jack Dorsey has launched a new, free collaboration app designed as a shared space for humans and AI agents to collaborate within the same channels and conversations.Launched under the Block brand (parent co…
Block's Buzz Takes Aim at Slack With Open-Source Workspace for Humans and AI Agents
Block just laid off more than 4,000 workers. Now the fintech company wants to change how teams talk to each other. And build software. And let AI agents sit right beside their human colleagues in the same digital room. The effort comes in the form of Buzz. A new platform unveiled this week that Block positions as an alternative to Slack, GitHub and a handful of other workplace tools. It runs on the decentralized Nostr protocol. It gives every pa…
Fresh off AI layoffs, Block now wants to whack Slack with agent-human collab tool
After cutting over 4,000 jobs due to AI, fintech biz Block is back with Buzz, a shared workspace where humans and bots can collaborate in ways that are more auditable, sovereign, and secure than what you can do in chat tools such as Slack. Block's human-bot co-op is built upon a turducken of tech jargon: The platform is free and open source. It's based on the decentralized Nostr protocol, so there's cryptographic identity. It's "sovereign," a na…
Jack Dorsey’s Block takes on Slack with Buzz
Jack Dorsey’s Block wants to take on Slack. The twist is that the workforce it is building for is half machine. Its new app, Buzz, is an open-source workspace where humans and AI agents share the same channels, and every agent carries its own portable identity. Block, the Dorsey-led fintech behind Square and Cash App, […] This story continues at The Next Web
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