AI Sandbox

Ever looked at Lovable or Bolt and thought, “I could build something like this — if I had the infrastructure to run a thousand isolated dev environments?” Yeah, me too. But here’s the thing — that multi-tenant sandbox layer with preview URLs, agent orchestration, and idle cost control is the hardest piece of the puzzle. Most teams either glue together Docker Compose stacks until they hit isolation limits, or resign themselves to $2000/month Kubernetes clusters. ...

Disclosure: I may earn a commission if you sign up through links in this review — at no extra cost to you. This doesn’t affect my assessment. Full FTC disclosure. Quick take: Sandboxed is the open-source backend that powers AI “build-in-a-browser” apps. One ./install.sh and you get isolated sandboxes, built-in coding agents, and auto preview URLs — no Kubernetes, no message queues, no SaaS dependencies. But ever wanted to spin up something like Lovable or Bolt on your own server? And not just the frontend — the actual backend that creates sandboxes, runs AI agents, and serves live preview URLs. ...