Free Website Monitoring
These are free services which will monitor your URL (or other Internet devices such as email servers) for downtime, and notify you via email and/or pager. Many are only free for a trial period, but some offer service for an unspecified length of time.
 1stWarning.Com - Free service monitors appr. once every three hours. several other plans. Also offers an affiliate program.
AlertBot - 15-day trial. This monitors websites, email servers, secure sites, FTP, Telnet, and more, and alerts you via pager, cell phone, SMS, or email, you configure. Several plans from 30 minute to 2 minute monitoring.
AlertMeFirst - 14-day trial. This monitors websites, email servers, secure sites, FTP, Telnet, and more, and alerts you via email or pager. You can also check unlimited URLs or IP addresses manually from their home page for your webpage's response time.
AlertSite - 14-day trial. This server uptime monitoring system will check up to 3 URLs every 15 minutes, and send email or pager notification. You can also check unlimited URLs manually from their home page for your webpage's response time.
AtWatch - 14-day trial. It will check your URL for availability every 20 minutes, and for performance every hour. It alerts via email, pager, or ICQ; and gives daily reports as well as one content report (checking site links and images).
Internetseer - Free. Checks web sites for modifications, slowdowns, and failures once an hour - twenty four hours a day. When an error occurs it emails or pages designated people. The service features one step sign-up/monitoring, a single administration page, and an easy-to-read status graph. Weekly reports.
KnightGuard - KnightGuard.net checks your Web Site once every 15 minutes, and alerts you if it's slow or not responding. We offer many user-customizable features including a "snooze" feature for extended outages. Both HTTP and PING checks are available. With a 30 day free trial and subscription plans starting at $4.00 per month, KnightGuard.net is a great value.
LinkAlarm - 100-webpages trial. It checks every link and email address on your web pages, up to once a day, and sends an excellent, detailed email report. They have an affiliate program to earn either money, or more points (1 point = 1 page) for continued service. Additional pages cost only 1 cent each. To conserve points, you can specify particular pages or directories to check.
Link Defender - Over 5% of all links on the Web are broken! Schedule Link
Defender to scan your entire Web site for broken links. Unlike other services, Link Defender can be ran an unlimited number of times. You pay no ongoing fees. It will e-mail you reports
as soon as a bad link is discovered. The Professional Edition lets you check an UNLIMITED number of Web sites, pages, and links as often as you like. You can even brand the reports
with your own company name and logo, and resell the service to your clients!
Netmon - They have 2 basic free monitors, one hourly, requires 2 failures to report, and one every 10 minutes which requires a button and 'http' homepage and requires 3 failures to report. They also have 3 paid plans, from 9.90 to 49.80/month.
RedAlert - 30-day trial. You can monitor any number of Internet devices, such as web servers, secure servers, domain name servers, SMTP, POP3, IMAP, telnet, IRC, gopher, news, finger, or ftp servers, as well as backend databases and interactive customer transactions. It checks every 15 minutes, and reports problems via email or pager, with optional daily reports.
SiteProbe - This free service checks 1 URL every hour and notifies you via email or pager if the site is down (or back up). You must login at least once a month. If your website appears to be down, your website is checked from a second location to make sure (this prevents false alarms).
Uptime 100 - 30-day trial. Alerts are generated via email, SMS (text message to a pager or mobile phone), voice message or fax, to up to 3 different members of your support team. Your Website and other services would be checked every 5 minutes, with alerts generated within 5, 10 or 15 minutes, based on your subscription.
WebAssure - 1-month trial. It monitors 1 URL or webserver (http, https, SMTP, news, or ftp) every hour. It sends weekly reports and an unlimited number of email notifications of down-time.
WebSiteAlert.Net - Free service monitors twice every hour.
WebSitePulse.Com - Free service monitors every 60 minutes. Several other more comprehensive plans available.
Last updated 5-13-08.
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