SaaSMonitoringDevToolsReliability

Silent Failure Patrol

External health checks for side projects that catch 'looks online but is actually broken' issues

Problem
An outside-in check of 649 public apps found many 'live' apps that had quietly stopped working, especially unattended side projects and demos. Indie developers rarely keep validating key flows externally after publishing and often lose users before hearing about failures.
Solution
After registering a site, the tool periodically runs key user paths (homepage, signup, login, payment, etc.) from the outside, compares screenshots, and alerts via email or webhook on silent failures, including step replays and likely causes.
Users
Indie developers, side-project authors, and small SaaS teams
MVP
Configure 3–5 critical URLs with simple interaction steps; scheduled external checks with screenshot comparison; failure alerts via email/webhook; failed-step replay
Revenue
Per-site subscription with a free tier for one site and one daily check; add-on deep-check packs
Why now
AI has accelerated shipping, and unattended side projects are exploding, yet existing uptime monitors only check homepage liveness, not whether critical flows actually work—a clear gap

Source discussions · 3

  1. Reddit[r/SaaS] Anyone else anxious about the legal side of launching their SaaS?
  2. Reddit[r/SaaS] Your app can look up while it's actually down: lessons from checking 649 public apps from the outside
  3. Reddit[r/SaaS] How do you guys catch bugs in your SaaS before they reach production?
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