Zed opens private beta for Delta, a multiplayer environment for reviewing AI-agent code

Zed Industries launched Delta, a browser-based multiplayer workspace for building software with AI agents and reviewing the code they produce, into private beta on August 12, 2026, the company said in its announcement. Zed began inviting the first users and said more invitations will follow over the coming weeks.

Delta is built on DeltaDB, a fine-grained version-control layer in which each individual edit operation is given a stable identity, rather than tracking only commit snapshots. Zed uses conflict-free replicated data types (CRDTs) so multiple people and agents can edit the same worktree in real time without merge conflicts, with comments staying anchored to code as it changes and agent conversations linked to the code they touch.

The pitch is aimed at a specific problem: reviewing work produced by AI coding agents, where the volume and speed of machine-generated changes strain tools designed for human-paced commits. Delta runs in the browser as a WebAssembly-compiled Rust client with no local install, and supports third-party agent harnesses including Anthropic’s Claude Code.

Zed frames Delta as the second half of a multi-year plan — after building its code editor — to make what it calls ‘the best place to talk about code.’

The launch is a single-source announcement from Zed, and the private beta is invitation-only, so its performance and scale claims are not yet testable by outside developers. It moves the project from the waitlist Zed opened on August 6 to working software in users’ hands.