upsonar.io
Don't let a CDN outage break your site silently
upsonar.io launched on December 3, 2025 with 1 votes.
What it does
Most uptime monitors only ping your server. But modern websites depend on dozens of external resources - CDNs, analytics, fonts, scripts. When Cloudflare goes down, your homepage looks fine in your monitoring dashboard, but your users see a broken page.
Monitor uptime from up to 6 of 8 global locations, track SSL and domain expiry, detect DNS changes and broken dependencies. Free alerts via email, Telegram, webhooks.
One platform instead of five. Uptime, SSL, DNS, domains, and dependencies — all monitored from one dashboard. Modern websites load 30–100 external resources. When any of them breaks, your site breaks too — but traditional monitors say "everything is fine". upsonar tracks every dependency individually. Modern websites load 30–100 external resources. When any of them breaks, your site breaks too — but traditional monitors say "everything is fine". upsonar tracks every dependency individually. Traditional uptime monitors only check if your server responds. They have no idea if your site actually works. Your users see a broken page. Your monitor sees nothing wrong. We load your page like a real…from upsonar.io
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I made a down detector for down detectorNov 2025 · downdetectorsdowndetector.com · ▲591After down detector went down with the rest of the internet during the Cloudflare outage today I decided to build a robust, independent tool which checks if down detector is down. Enjoy!!
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