Replay QA is an autonomous runtime testing platform. It finds bugs in your app, diagnoses the root cause, and tells you exactly how to fix them — with no test suite to write and no QA team required.
This article explains what Replay QA does and helps you pick the right way to get started.
What Replay QA does
Most tools check your code. Replay QA checks your running app — the same thing your users actually experience. It:
Explores your app and tests real user journeys automatically
Finds bugs in flows nobody thought to write a test for
Diagnoses root cause — not just "something broke," but exactly what happened and why
Suggests a fix for each bug
Records every session as a deterministic Replay recording you can inspect
You don't write or maintain any tests. Replay QA writes and runs its own.
Two ways to get started
Replay QA has two entry points. Pick the one that matches how you work.
Drop in a URL — run it once
Paste in a URL and Replay QA explores your app, tests it, and files structured bug reports. Zero setup, no GitHub connection, no test knowledge required.
Best for: vibecoders and solo builders (using tools like Lovable, Replit, v0, bolt.new, or local AI coding agents), internal tool builders, and agencies who want to QA an app before sharing or shipping it.
Add your GitHub repo — continuously running quality gate
Connect a GitHub repository and Replay QA becomes an always-on quality gate. It runs automatically on every main branch update and/or pull request, testing your app against your preview or staging environment and posting bug reports with root cause and fix right where you work.
Best for: engineers and engineering teams who want continuous coverage as they keep shipping.
Not sure which one?
If you… | Start with |
Built an app with AI and just want to know if it works | URL drop |
Don't have a GitHub repo handy, or aren't technical | URL drop |
Ship code through GitHub pull requests | GitHub repo integration |
Want quality coverage that stays on as your team ships | GitHub repo integration |
You can use both. Many teams start with a one-off URL run, then add the GitHub integration for ongoing coverage.
What makes Replay QA different
Replay QA records at the Chromium level — the same layer as the browser itself, not a JavaScript add-on. This produces a lossless, deterministic recording of exactly what your app did. That's what lets Replay QA trace the true root cause of a bug and suggest the right fix, instead of just flagging a symptom.
FAQ
Q: Do I need an existing test suite?
A: No. Replay QA writes and runs its own tests in every mode. There's nothing to author or maintain.
Q: Do I need to be a developer?
A: Not for the URL-drop path — if you can paste a link, you can run it. The GitHub integration is designed for engineering teams.
Q: What does it cost?
A: There's a free tier, and paid plans scale with usage. Sign up at qa.replay.io.