Built by Ellipsis, a Y Combinator startup, for engineering teams automating feature work and review.

Runs autonomous coding agents in isolated sandboxes defined and deployed through YAML files pushed via git.

Operates through GitHub pull requests and Slack, with agents chosen among Claude, Codex, and Gemini.

Founded in 2024 during Y Combinator W24 and actively operating with paid customers in 2026.

Lets teams codify and budget-cap recurring engineering tasks like review and small feature delivery.

Requires GitHub integration, agent YAML definitions, and calls out to third-party model providers per task.

Commercial hosted service with usage-based billing, closed source, executes agent actions in Ellipsis-managed cloud sandboxes.