We detect incidents
before your customers do.
No time limit, and no credit card required.
Trusted by folks from these companies, and hundreds more
Just last week we ran 1,619,227 uptime checks for 1,184 businesses, and reported 3,735 incidents.
Keep your customers informed
Your customers rely on your products and services. Let them know your real-time status with an automatically updating status page.
Minimize your support load. Add your customers as subscribers to your status page, and send consistent incident updates via email.

Alerts where you need them
OnlineOrNot sends you instant alerts when things go wrong via:
- SMS
- Slack/Discord
- Webhooks

Modern Uptime Monitoring
Making sure your websites, web apps, and APIs are still online doesn't have to mean using a tool that looks like it was built in the 90s.
Our web app even works on mobile, so there's no clunky app to download, install, and log-in to.

What others are saying about OnlineOrNot
Don't just take our word for it, see what our customers think.
Bet on indie hackers 🚀
Tried @RozenMD's OnlineOrNot uptime monitoring, and for a few days got notifications of 2min down time.
Thought that his tool was wrong as uptime robot didn't reported those downtime.
Turned out it was the other way.
Khaled BentoumiFounder of Data to PageOnlineOrNot does the job for me.
Charles MillerSoftware Architect at Atlassian
I just set up some site aliveness checks for @Archium_io with @RozenMD's OnlineOrNot.
Took me less than five minutes and it was completely self-explanatory, not to mention gorgeous. Seriously good experience.
Great job, Max! 👏👏
Graham LeaFounder of Archium.ioOnlineOrNot by @RozenMD is all one needs
It is easy to set up and very reliable. I have been using it for almost an year now.
Rajat SaxenaFounder of CourseLit
I'm using OnlineOrNot to monitor my @cloakist customers' sites, so I can respond quickly if they stop working
Love it. Super clean interface, very intuitive. Particularly impressed at how it can wait for full page load
Thanks @RozenMD for making this awesome tool!
Louis BarclayFounder of Cloakist