A monitor is only useful if it's up when everything else is down. So we don't run UptimeTwin on a single server, in a single place, on a single cloud. Here's how it actually works — the same page we'd want to read before trusting a monitoring vendor.
Most monitoring tools — and most of the sites they watch — live entirely on one cloud provider. When that provider has a bad day, and they all do, a monitor that lives there goes dark at the exact moment you need it most.
UptimeTwin runs on two completely separate clouds at the same time. Both are actively checking your monitors and both can send alerts. If one provider has an outage, the other simply keeps going — you still get checked, and you still get paged.
Both clouds run in parallel. Neither is a cold spare waiting to be switched on — they're both working right now.
On top of two clouds, we check from four regions across three continents. On Pro, Business and MSP you choose which region watches each monitor — check your European site from Europe and your US API from Virginia, so response times reflect where your customers actually are.
Every region runs from at least two datacenters on two providers — US West from three — so a single-site failure doesn't stop the checks there.
Anyone can send an alert the first time a request fails. The problem is that the internet is noisy: a dropped packet, a momentary DNS hiccup, a half-second of packet loss. Monitors that alert on the first failure are the reason so many people mute their pager.
We don't. Before we call something down, we require several failures in a row, and for HTTP, TCP, SSL and UDP checks we ask other regions whether they can still reach it. When you do hear from us, the alert already tells you which layer broke.
Every checker reports its own health and how quickly it can reach our database, from every region. If a region slows down or falls behind, we know before it can affect your alerts — and we can move checks to another region while it recovers. The system that watches your sites is watched just as closely.
The best proof is the product running in the open. Our live demo watches a set of well-known sites in real time — no signup, no setup.