Try it now — no signup required
Downtime Costs Money
Don't let your customers discover problems before you do
Problem
Your server returns 200 OK but the site is broken for users
Solution
We check external dependencies — CDNs, fonts, scripts — that other monitors ignore
Problem
False alerts from single-region monitors waste your time
Solution
Multi-region verification — alert only when multiple locations confirm the issue
Problem
SSL expires and browsers show security warnings to your users
Solution
Get notified before expiration so you can renew in time
Problem
Site works for you but is slow or down in other regions
Solution
Check from 9 locations across Americas, Europe, and Asia-Pacific
What We Actually Monitor
Traditional monitors ping your server. We go deeper.
Traditional Monitors
What others check
Server responds = everything is fine. But what if Google Fonts is down? Or your CDN? They don't check that.
Upsonar
What we check
We parse your HTML and verify every external resource: scripts, styles, fonts, images.
Works Best For
Note: We analyze HTML-declared resources. For JavaScript-heavy SPAs (React, Vue CSR), we see what's in the initial HTML — browser rendering for full SPA support is coming soon.
Start Monitoring in 30 Seconds
No complex setup. No learning curve.
Simple Pricing
Start free, upgrade when you need more