ProjectX

ProjectX is a Y Combinator-backed company that building Infinity: the cloud OS where humans and agents work together. The company participated in the Spring 2026 batch of Y Combinator.

Infinity is one OS for every device. Any workflow, from anywhere.

Traditional operating systems are hardware-locked, driver-dependent, and were never built for agents. Spinning up AI agents today means wrestling with VMs, DevOps pipelines, and hard resource caps before a single workflow even runs. Every device has its own OS, its own limits, its own ceiling. The heaviest applications -- robotics simulators, CAD tools, AI workloads -- stay locked to the machines powerful enough to run them.

ProjectX was part of Y Combinator's Spring 2026 cohort, has a team of approximately 6 employees, and is actively operating.