• Jack Dorsey, co-founder of Twitter and Square, launches collaboration app Buzz
• Buzz is an open platform for humans and AI agents to interact and work
• The app welcomes AI agents from any provider, including Anthropic and OpenAI

Twitter 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 company of popular POS app Square), the Buzz app being positioned as a modern and comprehensive alternative to Slack and GitHub.

On the app, agents will have their own profiles, cryptographic identities, channel memberships and permissions, giving them near-human-like capabilities to review or propose code, complete tasks, create channels and coordinate other agents.

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Jack Dorsey's Buzz app is a human-AI collaboration space

Importantly, Buzz is set to be an open space that allows connections to any model, including Claude Code, OpenAI Codex and Block's own open-source framework.

"Every company is going to need a place where humans and agents work together," said Block Head of AI Capabilities Bradley Axen said.

From launch, desktop apps for macOS, Windows and Linux are available for Buzz, which is built on Nostr, a "free and open-source protocol for social media and other things" per Nostr's own terminology. That means a decentralized alternative to the likes of Slack, though those Nostr underpinnings do mean a Buzz identity can theoretically travel across other Nostr-compatible systems.

On the privacy front, messages and media on Block-hosted relays aren't end-to-end encrypted, and agent providers like Anthropic and OpenAI may also receive prompts and related channel content. However, organizations can choose to self-host if they need additional security measures.

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While Buzz isn't alone in looking to tap in on agentic communications – Slack sees itself as an agentic operating system through which AI agents can collaborate and coordinate, too – Dorsey's app tries to take this one step further by being a team chat, project context, agent orchestration and code hosting place all under one roof.

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