How does it find the root cause of a failure?

Every session is recorded with a deterministic time-travel debugger. For failed tests, agents time-travel through the recording to find root cause.

How much does it cost?

Free includes 25 credits a month with no credit card required. Starter is $20/month and Pro is $200/month, with Private Cloud and On-Prem available. Credits are consumed per unit of work, such as a journey discovered or a bug analyzed. An average app costs about 20 credits per full QA run.

Automated QA testing

An automated QA testing tool that writes its own tests

Replay QA maps your app's user journeys, writes and runs Playwright tests, and debugs failures with time-travel recordings. No test suite, QA team, or manual configuration.

Start free How it works

No credit card required

Want your coding agent to do it?

What you get

Bug reports your coding agent deserves

Each report is prepared with coding agents in mind. A detailed root cause analysis, a suggested fix, a deterministic runtime recording, and all the context needed to do the job.

Video recording

Watch the failure exactly as it happened.

Annotated screenshots

See where on the page things went wrong.

Root cause analysis

With a confidence score, so you know what to fix first.

Suggested fix

Ready for a coding agent to apply.

What's automated

The whole QA loop, not just test execution

Exploration

Agents map the app and find the flows worth testing.

Test authoring and execution

Playwright tests are written and run in a Chromium browser.

Analysis

Agents read what the app did at runtime, not what the code says it should do.

Reporting

Root cause with a confidence score, plus a suggested fix ready for a coding agent.

What it catches

Bugs across runtime, UI, accessibility, and performance

Deep runtime bugs. React component failures, state mutations, race conditions, and async timing.

UI glitches. Layout shifts, broken buttons, and elements hidden behind overlays.

Accessibility. WCAG contrast violations, missing ARIA labels, and keyboard traps.

Performance. Slow network calls, render-blocking resources, and long tasks.

Built on Replay's time-travel debugger

Every session recorded deterministically

Replay QA is built by Replay.io, founded by ex-Mozilla engineers. Every DOM mutation, network call, and JS frame is captured, so failures can be debugged after the fact.

See how it works →

Frequently asked questions

No. Agents explore your app, discover user journeys, and write and run their own Playwright tests.

Test your web app today

Paste a URL or connect a GitHub repo. Free includes 25 credits a month, and an average app uses about 20 credits per full QA run.

Start free See pricing