Limrun is cloud infrastructure for mobile development designed for the era of autonomous coding agents. It exposes XCode, iOS simulators, Android emulators, and physical-device hardware as on-demand cloud services, so a coding agent running on a Linux VM, in a Replit sandbox, or inside a CI runner can compile iOS binaries, drive simulators, and watch them render without a developer ever opening a Mac.
The platform offers realtime remote XCode builds with streaming logs, S3-backed caching, attached simulators, accessibility trees for Appium, Maestro, and Detox, 60fps video capture, and shareable preview URLs that reviewers open in any browser. Agents can install builds over WebUSB to real hardware, generate demo videos for pull requests, and orchestrate batch actions with precise timing. Production users include Replit, Rork, Momentic, and Minitap, who use Limrun to merge mobile pull requests without ever checking the code out locally.
Founded in 2025 by Muvaffak Onus and backed by Y Combinator in the Spring 2026 P26 batch, Limrun positions itself as the mobile-dev equivalent of a browser sandbox for agents. The company prices on idle and active build time, billing closer to a cloud utility than a per-seat IDE. As cloud coding agents take over more of the software delivery pipeline, Limrun is betting that mobile, historically the most hardware-bound corner of dev, becomes a simple API call.