Render Sandboxes public beta gives each agent its own Firecracker microVM
Launched Nov 4, Render Sandboxes are isolated Linux microVMs that agents drive via TypeScript/Python SDKs or the Render CLI, with runtime snapshots that auto-suspend after 15 idle minutes and bill CPU only while in use. The beta is Oregon-only on all plans; private networking, SSH, and public URLs are still on the roadmap.