GitHub - adammiribyan/zeroboot: Sub-millisecond VM sandboxes for AI agents via copy-on-write forking

Zeroboot is an open-source project that provides sub-millisecond VM sandboxes for AI agents using copy-on-write forking. It leverages Firecracker microVMs and KVM to fork pre-snapshotted VMs in ~0.8ms with only ~265KB memory per sandbox. Benchmarks show it is significantly faster than alternatives like E2B (~150ms), microsandbox (~200ms), and Daytona (~27ms). Each sandbox is a real KVM VM with hardware-enforced memory isolation. Python and TypeScript SDKs are available, and a live demo API is accessible. The project is currently a working prototype, not yet production-hardened.