Every check runs from several points on the globe at once — never a single server that can itself go down. Coverage grows with your plan, France and the EU stay the baseline on every tier.
A local network hiccup between your datacenter and the check point is enough to trigger a false alert — the service itself is running fine for all your real visitors.
Several vantage points confirm before notifying you. You also see whether an outage is localized to one region (routing, CDN) or genuinely global.
4 FR regions on Free, 8 in the EU on Pro, 15+ worldwide on Max — never a need to switch tools.
Even on the free plan, your checks already run from 4 OVH datacenters in France — never a single point of failure.
Compare response time as seen from each check point, not just a global average.