Vigilmon vs Sentry: Uptime Monitoring vs Error Tracking (2026)

Sentry and Vigilmon are often mentioned together but they solve fundamentally different problems. This comparison explains what each does so you can decide what you need — or whether you need both.

What Sentry Does

Sentry is an error monitoring and performance tracking platform. It captures:

• JavaScript/backend exceptions with full stack traces
• Performance metrics (transactions, Web Vitals, TTFB)
• Session replays (watch what users did before an error)
• Release tracking (which deploy caused this error?)
• Cron monitoring (did my scheduled job run?)
• User feedback widgets

Sentry answers: "What errors are occurring in my application and why?"

What Vigilmon Does

Vigilmon is an uptime and availability monitoring platform. It checks:

• HTTP/HTTPS endpoint status every 60 seconds
• SSL certificate validity and expiry
• Response time thresholds
• Multi-region availability
• Broken links
• Public status pages for your customers

Vigilmon answers: "Is my site/API reachable right now, from the outside?"

Key Difference

Sentry runs inside your application (via SDK). It only knows about errors that your application catches and reports. If your server is completely down, Sentry stays silent — there's no app to report errors.

Vigilmon runs externally. It checks your URL from the outside, the same way a customer would. If your server crashes entirely, Vigilmon catches it immediately.

Side-by-Side Comparison

When You Need Vigilmon vs Sentry

Use Vigilmon when:

• You need to know if your site is down before users report it
• You want SSL expiry alerts
• You need a public status page
• You run background services with no users (APIs, webhooks)
• You want external verification of availability

Use Sentry when:

• You need to track JavaScript errors in the browser
• You want to know which code change caused a regression
• You need full stack traces for debugging
• You want session replay to reproduce user bugs
• You run cron jobs that need completion monitoring

The Case for Using Both

Sentry and Vigilmon are complementary, not competitive. Many teams run both:

• Vigilmon catches complete outages from the outside (server down, DNS failure, SSL expired)
• Sentry catches application errors from the inside (unhandled exceptions, slow queries, JS crashes)

Together, they cover the full picture. Vigilmon costs much less than Sentry for teams that don't need error tracking — just uptime visibility.

Summary

Sentry is for error tracking and performance monitoring inside your app. Vigilmon is for external uptime monitoring and status pages. They solve different problems and work best together.

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