1. With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.

  2. StatusCake | Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring

  3. Free Website Uptime Monitoring

  4. Uptime & performance monitoring for websites and APIs.

  5. PingTurk is a cloud-based platform to monitor website from many locations and behind different networks, reporting on customers experience.

  6. Downtime Monkey offers website downtime alerts and website monitoring solutions.

  7. RapidSpike is an uptime and performance monitoring service for websites and web applications.

  8. updown.io is a HTTP(S)/TCP/ICMP monitoring service which checks periodically the URL you want and reports back any anomaly.

  9. AlertBot provides availability and performance monitoring from an end user perspective.

  10. Pingometer is a service that monitors the uptime, downtime, and performance of websites. Get 24/7 monitoring - sign up for your FREE account today!

  11. Port Monitor is an easy tool that does website and server monitoring 24/7 every 60 seconds for free. It records uptime, performance and downtime causes

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    Atwatch provides advanced website monitoring services that include instant alerts when your site is unavailable and detailed report on monitoring stats.