For 15 years, UptimeRobot has answered one question for millions of people: is my site up?
Today we’re taking on a related question that’s become just as important: is everything my site depends on up?
We’ve acquired IsDown, which tracks the status of more than 6,000 cloud and SaaS providers in one place. Here are the details on what it is, why we bought it, and what we’re building with it.
Key takeaways
- UptimeRobot watches your systems. IsDown watches the 6,000+ services you depend on: Stripe, AWS, your AI APIs, your CDN.
- We bought IsDown so you can see both in one place and finally answer the 2 A.M question: is it me, or is it one of my dependencies?
- Nothing changes for existing IsDown customers. The product keeps running, keeps its name, and keeps improving.
- We are already working on ways to bring IsDown into UptimeRobot. More on that below.
Is it me, or is it my dependency?
Modern applications rely on far more than the code you write. Authentication providers, payment gateways, AI services, CDNs, cloud infrastructure, and dozens of other third party services all become part of the user experience.
A typical application may depend on:
- Authentication and identity
- Payment processing
- AI models and APIs
- Content delivery networks (CDNs)
- Cloud infrastructure
Every new integration makes development faster, but it also adds another dependency outside your control.
So when your site breaks at 2 a.m., it often isn’t your application that’s failing:
- Your checkout stops working because Stripe is down.
- Users can’t sign in because your identity provider is having an outage.
- AI features time out because the model API is degraded.
Meanwhile, you’re digging through logs trying to figure out what happened. A single failed deployment, cloud outage, or third party service disruption can take your application offline even when your own code hasn’t changed.
IsDown and UptimeRobot are two answers to the same question. Put them together and you can finally see your whole reliability picture in one place: what you run and what you depend on. We’ve got a few things in the works that we’re genuinely excited about. We’d rather show you than spoil them.
Tomáš Koprušák, CPO of UptimeRobot
What you can already do with UptimeRobot
You can already detect many third party failures with UptimeRobot. Point an API monitor at a provider’s health and other critical endpoints, or add keyword monitoring to make sure the site shows the correct HTML content.
It works, and it’s precise. It tells you whether a service responds for you in real time.
The limitation is visibility. They only cover the endpoints you’ve configured, and they can’t tell you whether a provider has already acknowledged an incident or whether other customers are reporting the same problem.
That’s where IsDown comes in. Instead of checking a handful of endpoints, it continuously tracks thousands of public status pages and incident reports, and it’s now built into UptimeRobot.
| UptimeRobot | IsDown | |
| Watches | Your sites, servers, APIs and endpoints | The official status pages of 6,000+ providers |
| Answers | Is my thing up? | Is the thing my thing depends on up? |
| Tells you | The moment your own check fails | The moment a provider reports trouble, often before they admit it publicly |
IsDown’s founder saw it early
IsDown was founded by Nuno Tomás, who built it largely as a solo founder into a profitable business trusted by companies including Fastly, Carvana, Kalshi, Bolt, and Coursera.
When we started looking for a way to add dependency monitoring to UptimeRobot, IsDown stood out. We evaluated the product, saw how well it solved the problem, and ultimately decided to acquire it rather than build our own alternative.
It’s a product we’re genuinely excited to bring into UptimeRobot, and we’re looking forward to building on the foundation Nuno created.
Building IsDown over the years has been one of the most rewarding things I’ve done. Handing it to a team that shares the same obsession with simplicity and reliability is the outcome I was hoping for. I’m excited to see where they take it.
Nuno Tomás, founder of IsDown
What we really acquired, and what we plan to do with it
Obviously we acquired the business, and the monitoring infrastructure itself: 6,000+ services watched, normalized into one feed, with alerts wherever you want them.
But the part we find more valuable sits underneath it.
We don’t want to let that data go to waste. Here are a few ways we’re already exploring putting it to work:
Better answers to “is it me or is it them?”
Knowing a provider is having an incident is helpful. Knowing it overlaps with your own alerts, down to the minute, is even better.
Pairing IsDown’s incident history with your UptimeRobot monitoring makes that possible.
An overview of the outages that matter
Our job has always been to tell you when your own systems have a problem. That doesn’t change.
What IsDown adds is context. Instead of wondering whether a problem is isolated to you or affecting a provider more broadly, you can see both in one place.
State of the Internet reports
We’ll have the data to identify which providers are consistently reliable, how outages spread, and whether things are actually getting worse (looking at you, vibe coding…).
We’d like to share those insights with the wider community, not keep them locked away in a database.
We’ll publish regular State of the Internet reports, alongside deep dives into major outages from our perspective, like we did when Cloudflare and .de domains went down.
You can find our 2025 report here.
A wider early-warning window
Official status pages often lag by 20 or 30 minutes, or don’t acknowledge outages at all. Somebody has to notice, confirm, and write the update.
IsDown also picks up early signals from real users reporting problems, flagging an issue before the provider admits to one. That signal gets stronger the more people feed into it, and with 3.3M+ users behind UptimeRobot we think it can get considerably stronger.
IsDown solves a real problem, and Nuno solved it better than anyone. We tested it the way our users would, were won over, and decided we’d rather build on his work than start from scratch. Our job now is to make it more useful to more people without messing up what already works.
Michal Aftanas, CEO of UptimeRobot
If you’re an IsDown customer
Nothing breaks and nothing moves. IsDown keeps running under its own name, and we’ll keep improving it.
A bigger team behind the product means more attention and faster improvements. It doesn’t mean IsDown disappears into something else. We will keep the spirit of what Nuno built: simple, focused, and reliable.
What’s next?
We’re already working on the first updates with UptimeRobot and IsDown, and there are plenty more to come.
Better monitoring, same simplicity. That’s always been the deal.
Want to see what your stack actually rests on?
Try IsDown free and put every provider you depend on in one place.If you’re already using UptimeRobot, you’ll be able to see even more as the two products come together.
