Lightweight Code Sandbox as a Service

Running arbitrary code from LLMs in Docker is a security risk (container escapes), but full VMs are slow and memory-heavy. Build a fast, secure, lightweight sandbox using RustVMM/KVM that boots in <60ms and supports high-density concurrency. Open-source and self-hostable. Target users: AI agent builders, LLM application developers, and companies building code execution features.

The explosion of LLM-powered coding agents and code-interpreter features—Anthropic's Claude, OpenAI's Code Interpreter, and dozens of agent frameworks all need somewhere to run untrusted code—has made secure execution infrastructure a real bottleneck, not a theoretical one. E2B is the closest named competitor here, having raised funding specifically to solve this problem, which validates demand but also means the market isn't wide open. The $5k–$20k MRR band is plausible for a self-serve developer tool with usage-based pricing, though it assumes enough paying customers who can't or won't self-host—tension with the open-source model is real and could compress revenue significantly. The biggest risk is commoditization from the cloud hyperscalers: AWS Firecracker (which already powers Lambda) is open-source, battle-tested, and free, so the actual moat has to come from the developer experience layer and managed hosting, not the VM technology itself.