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Sandboxes for
Coding Agents

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1// Like Lovable, Bolt, V0
2import { freestyle, VmSpec } from "freestyle-sandboxes";
3import { VmBun } from "@freestyle-sh/with-bun";
4import { VmDevServer } from "@freestyle-sh/with-dev-server";
5
6// Create repo from template
7const { repoId } = await freestyle.git.repos.create({ ... });
8
9const { vm } = await freestyle.vms.create({
10    with: {
11      devServer: new VmDevServer({
12        devCommand: "bun run dev",
13        runtime: new VmBun(),
14        repo: repoId
15      }),
16    },
17});

1// Like Devin, Cursor Agent
2import { freestyle, VmSpec } from "freestyle-sandboxes";
3import { VmBun } from "@freestyle-sh/with-bun";
4
5const { vm } = await freestyle.vms.create({
6  git: {
7    repos: [
8      { repo: "https://github.com/user/repo.git" },
9    ]
10  }
11});
12
13const { forks } = await vm.fork({ count: 3 });
14
15await Promise.all([
16  ai(forks[0], "Build the API endpoints"),
17  ai(forks[1], "Build the frontend UI"),
18  ai(forks[2], "Write the test suite"),
19]);

1// Like Code Rabbit, Greptile
2import { freestyle } from "freestyle-sandboxes";
3import { VmBun } from "@freestyle-sh/with-bun";
4
5const { vm } = await freestyle.vms.create({
6  git: {
7    repos: [{ repo: repoUrl, rev: branchRev }],
8  },
9});
10
11const { stdout: lint } = await vm.exec("bun run lint");
12const { stdout: test } = await vm.exec("bun test");
13const review = await ai(vm, "Review the diff for bugs");
14
15await github.pulls.createReview({
16  body: review,
17  event: test.includes("FAIL") ? "REQUEST_CHANGES" : "APPROVE",
18});

1// Like OpenClaw, Claude, Cowork
2import { freestyle } from "freestyle-sandboxes";
3
4const { vm } = await freestyle.vms.create({
5  persistence: { type: "persistent" },
6  // Pauses after 60s idle -- $0 cost, resumes on next exec
7  idleTimeoutSeconds: 60,
8});
9
10while (true) {
11  const userMessage = await getNextMessage();
12  const result = await ai(vm, userMessage);
13  await respond(result);
14}

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Agent Scale Infrastructure

Sandboxes made for running tens of thousands of agents

Instant Startup

VMs provision in under 700ms from API request to ready machine.

root@vm
$ freestyle vms create
[ok] Restored memory snapshot
[ok] Mounted /dev/vda1
[ok] Reached target network
[ok] Started systemd-resolved
[ok] Started sshd.service
[ok] Reached target multi-user
VM ready in 0.7s
root@vm ~ # #

Live Forking

Clone a running VM without pausing it -- get full copies in
milliseconds.

Pause & Resume

Hibernate VMs and resume exactly where you left off -- pay nothing
while paused.

ONOFF

Manage Agent Code

Git repos for your agents.

flight-telemetryfuel-optimizersafety-checklistsmission-rollupsengine-metricscomms-hotfixmainHEAD
Sandbox
Git Repo
acme
acme/app
zipline
zipline/api
nova
nova/app
[?]
[?]
sandbox-10k
10000/repo

Granular Webhooks

Configure webhooks per repo, filter by branch, path, or event type.

git pushci.internal/webhook hooks.slack.com/trigger freestyle
deploy 

Sync with GitHub

Bidirectional sync between Freestyle and GitHub repositories.

Deploy from Git

Push to deploy with Freestyle Deployments or clone into a VM.

terminal

The Most Powerful Sandboxes

Not containers. Full Linux VMs with real root access.

Nested Virtualization

Run VMs inside VMs, Docker, or any virtualization stack your agents
need. Full KVM support.

Users, Groups, Services

Sealed Linux users, systemd services and groups; multi-user isolation
inside every VM.

Full Networking Stack

The full Linux networking stack with real root access.

Ready to get started?

Free to start. No credit card required.

Start buildingRead the docs

What is a Freestyle sandbox?

What do I pay for paused VMs?

How is this different from other sandboxes?

How secure is it?

How are Freestyle Git repos different than GitHub?

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