Checksum

Checksum produces end-to-end Playwright tests and API tests with AI agents, then keeps them working as the app changes. It is sold to engineering and QA teams as a managed service, with human engineers checking the tests before delivery.

One agent builds end-to-end tests and heals them when the interface changes, while a second agent covers API endpoints. Tests arrive as pull requests that your team reviews and merges, then run in CI on every commit. Production errors are watched so each new bug can turn into a test.

Pricing follows the number of workflows Checksum maintains rather than seats or test runs. Most teams are onboarded through a demo, with a first batch of tests landing in CI within about a week of kickoff, according to the company.