Compare code sandboxes
boxd vs Cosmonic
Two code sandboxes tools for AI agents, side by side. Facts come from each tool's own site.
boxd
boxd.shHardware-isolated Linux VMs for agents and developers that keep running processes, files and shell state between sessions, with fork, snapshot, pause and hibernate, in boxd's cloud or self-hosted.
Visit boxd
Cosmonic
cosmonic.comWebAssembly sandboxes for agent code, MCP servers and tools, with no access until you grant it: the free Cosmonic Desktop app (public beta) and Cosmonic Control for Kubernetes. Open source core: CNCF wasmCloud.
Visit Cosmonic| boxd | Cosmonic | |
|---|---|---|
| What it does | Hardware-isolated Linux VMs for agents and developers that keep running processes, files and shell state between sessions, with fork, snapshot, pause and hibernate, in boxd's cloud or self-hosted. | WebAssembly sandboxes for agent code, MCP servers and tools, with no access until you grant it: the free Cosmonic Desktop app (public beta) and Cosmonic Control for Kubernetes. Open source core: CNCF wasmCloud. |
| In their words | Composable computers for devs and agents | Cosmonic: Sandbox AI agents and tools |
| Open source | No | No |
| Website | boxd.sh | cosmonic.com |
| Link checked | 2026-11-08 | 2026-10-20 |
More options:Alternatives to boxdAlternatives to CosmonicGuide: Best code sandboxes for AI agents
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