replay.ninja
Automated testing from real user behavior

Get website issue alerts that browse like a real user

Continuously monitor your website with automated testing. Get notified instantly when something breaks—before your customers notice.

No credit card required • 14-day free trial

Continuous monitoring in three simple steps

One line of code. Infinite peace of mind.

1

Embed Script

Add our lightweight JavaScript snippet to your site. Takes less than 60 seconds.

2

Monitor Continuously

We automatically browse your site like a real user, 24/7, testing critical flows and interactions.

3

Get Instant Alerts

Receive notifications the moment something breaks—via Slack, email, or webhook—before users are affected.

<script src="https://cdn.replay.ninja/v1/record.js" 
        data-api-key="your-api-key">
</script>

That's it. Start monitoring in under a minute.

Built for teams that ship fast

Whether you're running an online store, building SaaS, or managing client sites—we've got you covered.

Ecommerce

Eliminate revenue loss risk by catching checkout bugs, payment failures, and cart issues before they cost you sales.

  • Monitor critical checkout flows
  • Detect payment gateway issues instantly
  • Prevent cart abandonment bugs

SaaS Products

Reduce customer complaints and churn by proactively monitoring user experiences and catching issues in production.

  • Real user behavior monitoring
  • Catch edge cases automatically
  • Improve product reliability

Agencies

Offer proactive support and premium services by monitoring client sites 24/7 and fixing issues before they're reported.

  • Multi-client dashboard
  • White-label reporting
  • Proactive issue detection

Like uptime monitoring, but smarter

We don't just ping your site. We browse it like a real user, testing every interaction.

Real User Simulation

We don't just check if your site is up. We click buttons, fill forms, and navigate flows—just like your users do.

Instant Notifications

Get alerted via Slack, email, or webhook the moment something breaks. No more discovering issues from angry customers.

Smart Issue Detection

Catch JavaScript errors, broken forms, failed payments, and UI issues—not just server downtime.

Ship with confidence

Join hundreds of teams using replay.ninja to monitor their sites 24/7 and catch issues before customers do.

14-day free trial • No credit card required • Cancel anytime