Preview environments

Every branch and pull request can have its own environment with its own URL, built from that branch.

How previews work

• Push a branch and its environment builds automatically.
• Open a pull request and reviewers get a link instead of pulling the branch.
• Delete the branch and its environment is removed. Stale previews do not pile up.

Auto-deploy on push and automatic cleanup of removed branches are on by default. You can turn them off per application.

Production is protected

Each application has one production environment, marked and protected. Branch activity does not touch it.

Cost

Container previews scale to zero when no one is using them, so idle review apps cost nothing. See Pricing.