// Ephemeral · isolated · disposable
Spin up a fully isolated Docker sandbox or preview environment in about 15 seconds — one per pull request, per branch, or on demand. Perfect for review apps, dev sandboxes, and ephemeral testing. Runs on compute you own.
to a live environment
isolated per branch
to spin up in beta
What you'll use them for
A Spunto worker is an ephemeral environment: isolated, instant, and gone the moment you're done.
Every pull request gets its own live, shareable environment. Reviewers click a URL instead of pulling the branch and building locally.
A clean, throwaway box to try a dependency, reproduce a bug, or let an AI agent run wild — with nothing touching your real setup.
Spin an isolated, devcontainer-native workspace for any branch. Test features side by side, then throw them away when merged.
Why they're different
A ready-to-code, ready-to-preview environment boots in about 15 seconds — not minutes.
Each environment is its own container with network isolation. No cross-contamination, no shared state.
Create it, use it, delete it. Nothing lingers, nothing to clean up — the whole point of ephemeral.
Every sandbox runs on infrastructure you own (BYOC). Your code and data never leave your network.
The lifecycle
Kick off an environment from a branch, a pull request, or straight from the dashboard.
An isolated worker spins up on your node — code-server and a live URL, ready in seconds.
Share the link, test in a real environment, push changes and watch them reflect live.
Merge or move on — tear the environment down instantly. No leftovers, no drift.
Isolated preview and sandbox environments on your own compute — instant to create, trivial to throw away. Free while we're in beta.
Start for freeNo credit card · Isolated per environment · Your compute