Uptime Monitoring

Website and API Monitoring

  • checkmark 30-second checks from 12+ locations worldwide
  • checkmark Instant downtime alerts
  • checkmark Public and private status pages built-in

Join 50,000+ Developers Worldwide

See how you're performing

Everybody loves a fast website.

Configure performance assertions and stay ahead of any problems. Track your uptime and response time with 12 months of data retention.

Cover your entire stack

Monitor everything.

Add checks for your websites, APIs, servers, firewalls, endpoints, and more. Use simple uptime checks, or add custom assertions to validate their response.

Instant alerts when something isn't right

Be the first to know when incidents happen.

Detect and triage problems fast with clear and concise alerts. Add Cronitor to your workflow with 10+ alert integrations.

Keep everybody informed with a Status Page.

Status pages and reporting, built-in.

Keep everybody informed with status pages and automatic email reports.

Everything you need for website monitoring

Monitor your complete website user experience in minutes.

Start for free

Global monitoring

Run your website and API checks every 30 seconds from 12+ locations across 5 continents. Understand performance trends for each region, and focus your monitoring on where your users are located.

How uptime monitoring works

There was once a time when a business had a website, and it was up or down. As a developer or administrator, it was easy to keep track of what was going on, and you could step-in to fix problems when they became obvious. Today, that same business will have a website, a docs site, a blog, a storefront, a status page, marketing sites, micro sites and legacy monoliths. We created Cronitor Checks for the developers that support all this fragmentation and still deliver a professional, high quality experience for their customers and stakeholders.

Checks can be created from our dashboard, API or SDK to globally monitor your websites and APIs, so you can stay ahead of any issues that come your way, including:

  • Your host is unreachable
  • Your SSL Certificate is about to expire
  • A (500) Internal Server Error occurs
  • The request times-out
  • The response does not contain your expected content

Of course, there's a lot more to it than that, and Cronitor gives you everything you need for website and API monitoring, including:

Website monitoring

Ensure that your website is available all over the world and be alerted instantly when there is downtime.

API monitoring

Check the uptime, performance and validity of your APIs with active monitoring.

Server monitoring

Setup checks for the SSH bastions, email servers and VPN endpoints you rely on.

JavaScript? No problem

Run your website checks using real Chrome browsers to test your JavaScript apps.

Custom assertions

Build complex tests with custom assertions on page content, status code, response time and more.

Choose your locations

Select up to 12 locations for each test and focus your monitoring where your users are located.

Check every 30 seconds

Frequent checks can spot small problems before they become big incidents.

Real performance insights

Answer questions and monitor your SLAs with global and regional performance metrics.

No false alarms

Downtime is always verified by at least one additional region before an alert is triggered.

Developer friendly

Provision and version control your monitoring using our simple YAML configuration and CLI tools.

Live dashboards

See all of your APIs, websites and servers on a fast, easy to use dashboard with live updates.

Better uptime monitoring

Cronitor is a complete monitoring platform, not just another uptime monitoring tool.

Trusted by 1,000+ teams and counting


"Cronitor has increased our Operations staff's efficiency and responsiveness immensely. Their spin on micro-monitoring represents a best-in-class solution to the age old problem of visibility."

Ethan Erchinger Director of Operations

"I was finding too many cases where our cron jobs would silently fail - we sometimes would not find out for days that a job was broken. Cronitor gives our team the confidence and peace of mind that if a job is not running, we'll know fast."

Gary Malouf VP of Technology

"Before we used Cronitor, we had an important data backup job fail silently for over a month. We use Cronitor so that will never happen again!"

Natalie Gordon CEO
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Monitoring for Developers