Compare code sandboxes
Celesto vs Modal
Two code sandboxes tools for AI agents, side by side. Facts come from each tool's own site.
Celesto
celesto.aiHardware-isolated cloud computers for AI agents, with browser, desktop, shell and file access, pause, resume and forking, via CLI and SDK; Apache-2.0 microVM core you can self-host.
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Modal
modal.comServerless cloud for running, training, and serving AI workloads, including sandboxes.
Visit Modal| Celesto | Modal | |
|---|---|---|
| What it does | Hardware-isolated cloud computers for AI agents, with browser, desktop, shell and file access, pause, resume and forking, via CLI and SDK; Apache-2.0 microVM core you can self-host. | Serverless cloud for running, training, and serving AI workloads, including sandboxes. |
| In their words | Celesto: Build agents. Give them real computers. | Modal: The platform for production AI |
| Open source | Yes | No |
| Website | celesto.ai | modal.com |
| Link checked | 2026-10-20 | 2026-10-20 |
More options:Alternatives to CelestoAlternatives to ModalGuide: Best code sandboxes for AI agents
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