Describe your test. That's it. AI agents open real browsers and test your app like actual users. Replay every click, trigger on every GitHub, GitLab, or Vercel deploy. Free tier. No card needed.
No more wondering if your app is up, if people can login, trying to account for every edge case. Simple schedule an agent to test it or trigger it on deployment.
Usage is a free macOS menu bar app that shows how much of your Claude, ChatGPT, Cursor, GitHub Copilot, and Antigravity plans you've used. No account, no server, analytics off by default.
Stop building in the dark. Stop asking your mom if your startup idea is good. Stop guessing whether people want what you're about to spend 3 months building (or 3 days vibe coding).
I made a fix: SanityCheck.dev
You post your idea.
The internet tells you the truth.
You get real signals, not optimism bias.
If you’re brave enough, submit your idea: sanitycheck.dev
SanityCheck AI agents that QA-test your web app in real browsers.
