"Real browser monitoring is a must." Lenny Rachitsky, TransparentUptime.com
Real browser monitoring for all websites, including complex HTML, Javascript, Flash, AJAX and Java.

Monitor your Website from a User’s Perspective


Web performance matters. A slow website can drive customers to your competition, severely impact employee productivity, or hinder critical processes needed to support your business.

And common problems such as slow Web response times, failed transactions or time outs, bugs in Ajax, Flash or Silverlight front-end applets, or even different user experiences in different locations or browsers happen all the time.

The solution: The only way to detect and prevent these types of problems and ensure quality user experiences is to test and monitor your Website from your customer’s perspective.

What Others Say


  • TechCrunch Review:
    "Powerful real-time monitoring of transactions...
    extremely moderately priced"
  • OpenTube Review: "AlertFox is the
    best website monitoring
    service
    for Web 2.0 sites"
  • User Feedback: "Best service for web application monitoring"
AlertFox: Trusted by thousands of users   Go to Plans & Pricing
Ensure a great user experience and monitor complete online processes (e.g., the complete check out process, not just store uptime). Only AlertFox's browser-based real-user monitoring solution can test function and performance of sites that rely on any of the major rich internet applications (RIA), including ActiveX, AJAX, Flash, Flex, complex HTML and Silverlight technology. Monitor and improve your site usability and increase conversion and revenue. 

As the first synthetic monitoring service that can monitor web applications with Flash and Silverlight applets, AlertFox is able to monitor sites like YouTube or Google Docs that previously were not candidates for these types of services. Furthermore, this real-user monitoring runs directly in the web browser, thereby monitoring the true user experience. AlertFox constantly monitors web applications, alerting owners to problems that other monitoring services overlook. And since AlertFox is offered as a service there is no internal software to deploy and maintain. Give it a try for free -- just enter your Website URL here and give it a go!
Real User Monitoring - See the problems just like your users see them. AlertFox includes detailed error reporting, so you can determine exactly why your website failed and quickly correct it. Note that a 3rd party component error as shown in the screenshot above ("Waiting for widgets...") is not available to classic monitoring services, as it only appears inside an actual web browser.

Sign-up for a PRO3 account with macro creation service, the first 30-days are free.

Click to Sign-up
Easy to sign up and get started. Our free account let's you try all our features.

Click Here
Do you need more information? Please see the list of FAQs.


Click Here

Why use AlertFox?
arrow Best service for multi-step
web application monitoring

arrow Actual browser-based transaction monitoring.

arrow New: Receive screenshots when errors are detected. 
See what your users see!

arrow Only service to support Internet Explorer and Firefox (PRO)

arrow Unique: Flash performance
monitor & image recognition.


arrow Unique: Java and Silverlight performance and transaction monitoring

arrow Unique: 100% AJAX Support

arrow Based on iMacros, the leading web browser automation tool - free license for our users.

arrow Did we mention that even with all these features our PRO accounts costs less than any of the "big -name" Web 1.0 website monitoring services?