Website hosting companies always promise 99.99% uptime. The truth is that few companies ever reach that. No one likes to see their website go offline. If any of your websites go down, it is important that you know about it as soon as possible so that downtime can be kept to a minimum.
An effective way to do that is to use a website uptime monitoring service. These services will alert you as soon as your website goes offline. They can do this via email, text message (SMS) or even a telephone call.
This page lists good website uptime monitoring services that are available to you.
Be sure to check out the uptime monitoring article within my website hosting guide to read more about the benefits of monitoring your websites.
 | AlertraA website monitoring service that will alert you as soon as your website or server is offline. You can be altered via a phone call, SMS, XMPP or e-mail. Plans start from around $10 per month. |
 | Are My Sites UpAn easy to use monitoring service that offers one minute checks for $8 per month. The service can alert you via SMS, RSS feed and an iPhone or Android app. |
 | Binary CanaryA free website monitoring service that will check your website every 15 minutes to see if it is online or offline. SMS alerts and website monitoring every minute is available for a monthly fee. |
 | GotSiteMonitorA monitoring service that will check your website in 12 monitoring locations across 4 continents. Their free plan allows one website to be monitored with email alerts. Pricing for unlimited website monitoring with SMS alerts start from $4.95 per month. |
 | HetrixToolsA great service that offers uptime monitoring, blacklist monitoring, and a blacklist check. Up to five websites or services can be monitored free of charge and it only costs $9.95 per month to monitor twenty websites. The service provides lots of ways of getting notifications including social media and push overs. |
 | Host TrackerA website monitoring service that can deliver downtime notifications via email, messenger services, or to your mobile via SMS. You can monitor up to 5 URL’s for $4.99 per month. A free plan is also available that is limited to 30 minute interval checking and two websites. |
 | InternetseerA reliable website monitoring service that apparently monitors over two million websites. Their standard monitoring service is free though checks are only made every sixty minutes. Their premium plans start at $12.99 per month and offer more frequent checks. |
 | Internet SupervisionInternet Supervision will monitor the availability, content and performance of your website. Their free plan monitors one website every 15 minutes. Premium plans start from only $2.95 per month. |
 | Internet VistaA monitoring service that can give alerts via email, SMS and Twitter. Prices depend on the monitoring frequency and alert type you choose. There is a 30 day free trial available for anyone who wants to test their service. |
 | Monitor.usMonitor.us is a respected monitoring service that can monitor websites, networks, databases and more. |
 | MonitiveA world wide monitoring network that can monitor your website from over a dozen locations. A free plan is available that will monitor one website with ten minute intervals and email and Twitter alerts. Premium plans are available with SMS alerts and one minute interval monitoring. |
 | A monitoring service that checks your website every thirty minutes free. Alerts are provided by RSS, Mac, PC and Android. Check frequency can be improved for a monthly fee. |
 | MonToolsMonTools provides monitoring, alerts and reports. Fees depend on the frequency option you choose. |
 | PagerDutyA provider of SaaS IT on-call schedule management, alerting and incident tracking. Alerts can be provided by SMS, telephone call, email, iOS or Android push. Their standard package costs $18 per month. |
 | PingdomOne of the most popular website monitoring services online. Their basic plan starts at $6.96 for monitoring one website. Email, Twitter and SMS alerts are available. You can also get alerts through an iOS or Android app. |
 | ServiceUptimeA monitoring service that will monitor any service every 1, 2, 3, 5, 10, 15, 30 and 60 minutes. Standard plans start from $4.95 per month. |
 | SiteUpTimeA website monitoring service that offers 30/60 minute checks for one website free. For $5 per month, you can monitor three websites, get SMS downtime updates, and do uptime checks every five minutes. |
 | Site24x7Site24x7 offer a wide range of services including website and web application monitoring, DNS monitoring and cloud monitoring. It offers Android and iOS apps for monitoring all of your services. A basic monitoring service is available free that monitors 5 websites at 10 minute intervals. |
 | StatusCakeA website monitoring service that offers website monitoring, social media monitoring, user monitoring and malware checks. Their free plan offers 5 minute interval monitoring at random locations. Premium plans offer many more features from only £3.49 per month. |
 | UptimeRobotA fantastic service that offers 50 monitors to be checked every five minutes free. Alerts can be provided via e-mail, SMS, Twitter or mobile push. Interval time can be reduced to one minute for only $4.50 per month for fifty websites. I have been using UptimeRobot for years and have always found their service to be reliable and easy to use. |
 | UptrendsA feature rich monitoring service that can track website uptime, website performance, real time browser monitoring and more. They can monitor from over 120 locations and they offer dedicated apps for iOS, Android and Windows. Their cheapest package starts at £12 per month, however a free trial is available. |
 | WebSitePulseWebSitePulse offer a range of monitoring services from only $3 per month. Their monitoring network spans across over 40 cities across the globe. |