Run AI code in real microVMs.Not containers.
Sistemo boots a Firecracker microVM for every sandbox — own kernel, isolated network, ready in about a second. One API call, prepaid so you never get a surprise bill.
Private beta. The cloud isn't open yet — everything below is what it will do. Request an invite and we'll email you when it opens.
- No card to start
- Python + TypeScript SDK
- Pause at €0
# pip install sistemo from sistemo import Sandbox sb = Sandbox() # real microVM r = sb.run("python3 agent.py") print(r.stdout, r.exit_code)
Containers share a kernel. That's the problem.
When an LLM writes the code, shared-kernel isolation is not enough. MicroVMs give each run its own kernel — the boundary you actually need.
- Shared host kernel
- Escape = host compromise
- Noisy neighbors on the same node
- Hard to reason about multi-tenant risk
- Own kernel per sandbox (Firecracker)
- Jailer + network isolation on the host
- Dedicated resources, clean teardown
- Built for AI-generated & untrusted code
Hardware-level isolation
Every sandbox is a Firecracker microVM. Not a container with extra flags.
One API. Minutes to first run.
Mint a key, Sandbox().run(…). Python and TypeScript SDKs, zero deps.
Prepaid. No surprise bills.
€5 free, no card. Usage draws the balance. Machines pause at €0 — your spend cap is the wallet.
From signup to running code
Three steps. No infra to manage.
- 1
Get an API key
Open the dashboard, mint a full-scope key. Copy sk_live_… once.
- 2
Install the SDK
pip install sistemo or npm install @sistemo/sdk — pure stdlib / fetch.
- 3
Run code
Sandbox().run("…") boots a microVM, returns stdout and exit code.
Built for people who run other people's code
If the code came from a model, a user, or a plugin — give it a machine, not your host.
AI agent builders
Your agent writes code. Run it in a microVM, not next to production secrets.
AI coding tools
Execute model output per request behind one API call. Tear down when done.
Untrusted workloads
User scripts, plugins, eval harnesses — isolation you can explain to security.
Simple pricing
No subscription. Your balance is the spend cap.
Add a card (no charge) → €30 total trial
- Pay per second compute · per GB-month storage
- Trial: 1 machine · 1 vCPU · 1 GB · 20 GB storage
- At €0 machines pause — never a surprise invoice
Be first on a real microVM
€5 of credit and an API key waiting the day the cloud opens. No card, no commitment.