Products.
Three jobs for the websites you own, and four free checkers for any public site. Every paid product runs only against a site you have verified.
Plans and limits are on the pricing page.
Monitor.
Know within minutes when a site goes down, and when it comes back.
Test.
See how a site behaves under traffic, and where it slows.
Secure.
Find the gaps before a security review does.
Check.
Look at any public website in seconds. 3 checks a day with each checker, more with a free account.
The Down Checker never needs an account.
Around the checkers.
Bulk Checker
Check many sites at once from a list or a CSV, with a CSV of the results.
Compare Scans
Two scans side by side: staging against production, or before and after a change.
Free Tools API
The JSON API behind the checkers, with CI gates, badges and alerts.
Publish Your Results
Show customers your security grades on a public page, verified through DNS.
Popular Services
Is GitHub, Slack or Stripe down? Our own checks beside each official status.
Internet Weather
The status of the big clouds, CDNs and DNS resolvers in one place.
Probe Network
Where the checks come from, and whether each region is answering.
Methodology Changelog
Every version of the grading models and what changed in each.
Start with your own sites.
Monitoring is free for 10 sites. Add the tests when you need them.