Orca, a YC-Backed 'Agent Development Environment' for Running a Fleet of Parallel Coding Agents, Crosses 12.5K Stars

GitHub·high signal

stablyai/orca is an open-source ADE that runs Claude Code, Codex, Cursor, Grok, OpenCode, Pi and 30+ other CLI agents side-by-side, each in its own isolated git worktree, from one desktop app plus a mobile companion for steering the swarm remotely. It uses your own subscriptions/keys (no per-seat fees or API markup) and has grown past 12,500 GitHub stars while being backed by Y Combinator as of July 2026. This is directly aimed at solo builders orchestrating multiple agents in parallel on their own plan.