The agent swarm platform. Thousands of agents in parallel, each in its own Ubuntu microVM with root, Docker and nested KVM. Pay per second. ✨https://xitter.cf/t.co/h3pD789f2G
inside of a superfast VM
Joined October 2026
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Run the same task 5 ways at once, keep the best diff.
Prepare a repo once, fork the sandbox once per attempt, let an agent try in each fork and run the tests. Keep the winning diff, delete the rest.
sandboxer.com/guides/best-of…
Give every agent its own computer.
Sandboxer runs your agents in real Linux VMs: root, Docker, nested KVM. Run one or a thousand in parallel, pause with memory intact, pay per second.
sandboxer.com
Your agent needs to call an API. Does the key have to live in its sandbox?
No. Here's how to keep it outside, so a prompt-injected agent can't leak what it never had:
sandboxer.com/guides/keep-ap…
Sandboxer now runs in two regions: US East and EU.
Sandboxes start in the region closest to you, or pick one yourself. Same API, same sizes, same per-second pricing.
sandboxer.com/docs/api/regio…
Run the same task 5 ways at once, keep the best diff.
Fork a sandbox mid-task (memory and all), let an agent try in each fork, then keep the winner and throw the rest away.
sandboxer.com/guides/best-of…
New sandboxes are now ready in a median of 0.69 s (measured from US-East, 20 creates), down from ~1.5 s.
Each node keeps a few booted, paused VMs on standby. Every sandbox still gets its own machine id and SSH keys.
sandboxer.com/changelog
Give every agent its own computer.
Sandboxer runs your agents in real Linux VMs: root, Docker, nested KVM. Run one or a thousand in parallel, pause with memory intact, pay per second.
sandboxer.com
