Why uptime matters
Every minute of unscheduled downtime in a SaaS product is a churn event in slow motion. Customers who hit a broken login, a 502 on a critical API endpoint, or a checkout that quietly fails do not file a support ticket — they switch to a competitor and never come back.
Worse, modern SaaS architectures fail in ways that 200-OK monitoring misses entirely: a new auth deploy that returns successful responses but rejects valid tokens, a third-party CDN that is up but serving stale assets, or a payment webhook that is silently dropping events. SaaS uptime monitoring needs to look at semantics, not just status codes.
What goes wrong
- Login flow returns 200 OK but rejects every credential — status-only monitoring shows green while support tickets pile up.
- API endpoint regression after a deploy: response code is correct but body is malformed.
- SSL certificate expiry on the API subdomain — auto-renewal failed silently 27 days ago.
- Public status page is out of date because nobody remembered to update it during the incident.
- Response time degradation that is just under the alert threshold — customers feel it before any monitor fires.
- Webhook endpoint timing out, causing downstream customer integrations to fall behind.
Monitors that matter
These are the Uptrue monitor types that map most directly to the failures above. Each links to a full setup guide.
Test REST APIs with assertions on status, body content, and response time. Catches the semantic regressions that 200-OK monitoring misses.
Foundational up/down check from the edge. Two-confirmation logic eliminates false positives from transient network blips.
Catch slow degradation before it becomes a customer escalation. Configurable warn and critical thresholds per monitor.
Get warned 30, 14 and 3 days before expiry — across every subdomain, not just the apex.
Verify the login button, dashboard heading or other critical text is present. Catches partial outages where the page loads but the feature is broken.
Detect when scheduled jobs (billing runs, data exports, customer notifications) silently stop firing.
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