computer vs CubeSandbox
Virtual filesystem for agents inside a Cloudflare Durable Object — SQLite-authoritative state with pluggable execution: FUSE-mounted containers, isolate shell (just-bash) or isolate JavaScript. — versus — Hardware-isolated microVM sandboxes for AI agents — sub-60ms boot, <5MB overhead, E2B-compatible API, self-hosted on your own KVM nodes.
Same job, opposite trust models: cubesandbox is hardware-isolated microVMs on your own metal; computer is Cloudflare-native isolates around a durable filesystem.
| computer | CubeSandbox | |
|---|---|---|
| Stars | 5.7k | 11k |
| Forks | 286 | 1.0k |
| Language | TypeScript | Rust |
| License | MIT | NOASSERTION |
| Last activity | 2 days ago | 3 days ago |
| Topics | agents | agents, local |
| Curated connections | 3 | 12 |
computer — the curator's take
The interesting inversion: the filesystem is the durable object and execution surfaces attach to IT — container, isolate shell and isolate JS all project the same authoritative SQLite state, so agent state survives any runtime. When NOT: PREVIEW ONLY by its own banner — APIs unstable, explicitly not for production, and the spec docs describe intent, not the code; it's also Cloudflare-shaped through and through — no Workers, no computer.
CubeSandbox — the curator's take
Reach for CubeSandbox the moment your agents execute model-generated code and "just run it in Docker" stops feeling safe — it gives every tool call a disposable hardware-isolated microVM with E2B's SDK ergonomics, minus the SaaS bill, plus snapshot/rollback of any sandbox state. The catch: it's real infrastructure — you need KVM-capable Linux hosts and someone willing to operate them. Prototyping a single local agent? A container or E2B's hosted tier is less machinery. It's a runtime, not a framework — you still bring LangGraph/AutoGen/whatever on top.