Run Cloud

Infrastructure that agents love.

Quick start

One platform

Simulators, builds, and microVMs under one API.

Start the machine your agent needs, run the work, keep the state. No fleet management, no platform-specific orchestration.

01Early access

iOS Simulators

Create and stream iOS simulators, open URLs, install app builds, and control their lifecycle over API.

02Early access

XCode Builds

Archive, sign, export, and upload iOS builds without maintaining Apple hardware.

03Private beta

Linux Sandboxes

Firecracker microVMs with their own kernel. Snapshot, fork, pause, and resume.

Simple API

One command surface.

SIMULATOR.TSTYPESCRIPT SDK
import { writeFile } from "node:fs/promises";
import { Client } from "@run-cloud/sdk";

const cloud = new Client();
const session = await cloud.ios.create({
  displayName: "Agent smoke",
  inactivityTimeout: "60s",
});

await cloud.ios.openUrl(
  session.id,
  "https://run.cloud",
);
const shot = await cloud.ios
  .screenshot(session.id);

await writeFile("run-cloud.png", shot);
RUN CLOUD / CLIREADY
$ run-cloud createStart a sandbox
$ run-cloud execRun a command
$ run-cloud forkBranch a snapshot
$ run-cloud pausePause at no cost
$ run-cloud desktopOpen a live screen

The production cloud for agents.

Run Cloud SDK

Mobile sessions, in code.

Use TypeScript, Python, or Go for the native API. TypeScript and Python also ship provider-shaped adapters for incremental sandbox migrations.

Agent-native runtime

Built for speed, with state.

Start isolated microVMs in under a second, execute with millisecond-class overhead, and preserve the environment between agent steps.

Elastic capacity

Fork one environment into hundreds.

Snapshot once, fan out agent branches and test runs in parallel, then scale back down without managing a fleet of idle machines.

RUN / SBX-4F2AEXIT 0
STDOUTARTIFACTSUSAGE

Production control

Every run has a result.

Stream output, capture exit status, enforce timeouts, retain artifacts, and follow each sandbox from creation through snapshot and teardown.

<200ms
warm resume, ready to work
$0
while a sandbox is paused
1 → many
agents forked from one state

The primitives behind reliable agent work.

Hardware-isolated execution

Run untrusted and AI-generated code inside KVM-backed microVMs with a dedicated kernel and filesystem.

State that branches with the work

Snapshot a complete environment, restore it later, or fork it into parallel agent branches.

Computer use, built in

Give agents a real screen to inspect and control through screenshots, taps, clicks, typing, and live previews.

One path from code to TestFlight

Move from an isolated workspace to an iOS simulator and XCode build without your own Mac fleet.

MICROVM / SBX-4F2AISOLATED

FAQ

The practical details.

The pieces teams usually ask about before giving agents real infrastructure.

What is Run Cloud?

Run Cloud is infrastructure for agent builders and mobile development. It offers iOS simulators, XCode builds, and Linux sandboxes behind one API.

How fast do Linux sandboxes start?

A fresh Linux sandbox is designed to start in under a second when its immutable image is already cached on the selected host.

How does billing work?

Everything is metered per second of actual runtime: vCPU, memory, and storage. Paused sandboxes have no cost.

Is it safe to run untrusted or AI-generated code?

Yes. Linux sandboxes are hardware-virtualized Firecracker microVMs with KVM isolation, not shared-kernel containers.

Can I snapshot and fork a sandbox?

Yes. Filesystem snapshots are point-in-time and copy-on-write, and can be restored on any host in the fleet.

I already use another sandbox provider. How hard is switching?

One line. Drop-in adapters for Modal, E2B, Blaxel, CodeSandbox, Vercel, Cloudflare, Fly.io, and Daytona let existing sandbox code keep working against Run Cloud.

Do I need a Mac to ship iOS apps?

No. XCode builds archive, sign, and export your IPA in the cloud and can upload straight to TestFlight.

Give every agent somewhere safe to run.

Start with Linux sandboxes, add iOS simulators when your workflow needs a screen, and ship iOS without managing Apple hardware. $15 free every month.