Synthetic Monitoring: Test Your App Before Your Users Do
Your homepage loads. Your API responds with 200. Your database is connected. And yet, nobody can actually log in — because the auth service's Redis session store silently started rejecting writes an hour ago.
Uptime checks only tell you if your server responds. Synthetic monitoring simulates real user flows — login, checkout, search — so you catch broken features before anyone reports them.
The gap uptime monitoring leaves
HTTP uptime checks verify one thing: your server responded. They don't verify that the response was correct, that a critical feature is functional, or that a user flow completes successfully.
What to monitor synthetically
Prioritize flows that directly impact revenue or retention:
Authentication — Can users log in? Can they reset their password?
Core feature — Whatever your app's primary value prop is.
Checkout/upgrade — For paid products, can users complete a purchase?
Start with 2–3 flows. Cover authentication and your most-used feature.
Building durable synthetic tests
Use dedicated test accounts. Don't run synthetics against real user accounts.
Assert on semantics, not markup. Check for meaningful content, not CSS selectors that change with UI updates.
Clean up after each run. If your test creates data, delete it at the end.
Synthetic vs real user monitoring
Synthetics tell you something is broken before any user hits it. Real User Monitoring tells you the impact on your actual traffic. For small teams with limited budget, synthetics give more value per dollar.
Geographic coverage
A synthetic test from Frankfurt can't detect that your CDN is serving stale content to users in Singapore. Run checks from regions where you have meaningful user concentration.
AlertsDock Pro runs monitors from 3 regions; Team plan expands to 5 with custom region selection.
Feature Guide
Uptime Monitoring
AlertsDock gives teams uptime monitoring for websites, APIs, TCP checks, DNS checks, SSL expiry, and fast alert routing without enterprise overhead.
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UptimeRobot Alternative
Compare AlertsDock with UptimeRobot for teams that want uptime monitoring plus heartbeat monitoring, status pages, webhook inspection, and per-resource alert routing.
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