Cate

Cate is an open-source infinite-canvas IDE for running parallel coding agents, with editor, terminal and browser panels in one spatial workspace.

At a glance

Cate is in the directory but not on our ranked shortlists, and we have no traction figure for it yet.

As of Nov 12, 2026

Who it's for: Developers running several Claude Code or Codex sessions on separate git worktrees who want to see them all at once.
What does it do?: An infinite zoomable canvas for coding. Run Claude Code, Codex or any agent CLI in a terminal panel and the canvas shows whether each agent is working, finished or waiting on you. One click creates a git worktree with its own territory on the canvas.
What does it cost?: Free and open source under MIT.
Where does it run?: Desktop app for macOS (DMG, Homebrew cask), Windows (installer) and Linux (AppImage, DEB). Workspaces can run on a remote machine and be shared across computers and an iPhone.
Which agents does it work with?: Claude Code, Codex or any agent CLI. Supported CLIs report turn start, turn end and permission prompts to the panel.
Who makes it?: 0-AI-UG, a GitHub organization (the site is on cero-ai.com). MIT licensed.

Sources

What is Cate?

Cate is an open-source infinite-canvas IDE for running parallel coding agents, with editor, terminal and browser panels in one spatial workspace.

Who is Cate for?

Developers running several Claude Code or Codex sessions on separate git worktrees who want to see them all at once.

How much does Cate cost?

Free and open source under MIT. Checked against the vendor's pages on Nov 12, 2026. Plans change often, so confirm before you decide.

Does Cate run locally or in the cloud?

Cate runs in the vendor's cloud. You use it through chat apps and an API.

What are alternatives to Cate?

See the Agentic development environments shortlist for the other options.

No head-to-head pages for this one yet.