Pingability & Pingability

23. Pingability

Pingability Free Uptime Monitoring Service (image credit – pingability.com)

If you have lesser than 750 checks per month (which is about once an hour for a month) you can access free website monitoring from Pingability. SMS and phone alerts are not included in the free plan. You can run more checks for free if you give a link back to their site from yours.

Pricing plans are shown here.

24. C

GoSiteMonitor Free Uptime Monitoring Service (image credit – gotsitemonitor.com)

You can monitor five sites, with a time interval of five minutes between each monitor. With one user account allowed in the free plan, you can also get access to unlimited email alerts and 20 phone or SMS alerts.

Enhanced features are available with paid plans.