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Real User Monitoring (RUM) entails collecting performance data from your actual website users. Uptrends' regular synthetic monitoring runs in a predictable environment, using a fixed monitoring interval. Synthetic monitoring works well for availability monitoring and detecting performance changes of web pages. RUM, on the other hand, runs in less predictable environments (i.e. on your end user’s devices and computers) and as such focuses much more on measuring the actual experience of your users. We've placed your RUM-based data inside your existing Uptrends account, and you can see your RUM data and synthetic data side by side.

Getting started with Uptrends RUM

Starting with RUM entails two actions: adding a RUM website definition to your account, and implementing the script in your actual website.

Adding a RUM website to your account

  1. If you're not already using the Real User Monitoring function in Uptrends, you can try it for free by starting a RUM trial. In the Apps & Extras menu, click the Try Real User Monitoring option.
  2. On the Start RUM trial page, click the Try Real User Monitoring button.
  3. Fill in the URL of the website you want to monitor. Click the Create first RUM website button.
  4. Your RUM trial has now started. Click the Show instructions button to navigate to the settings of your new RUM website.

Implementing the script in your website

Unlike regular website monitoring, you need to do some work on your side. We provide you with a small piece of JavaScript that you add to the web pages you would like to measure using RUM. We designed the script to not interfere with other scripts on your website, and your end users will not notice anything once you've added the Uptrends RUM script to your pages. The impact of having the RUM script on your site is virtually zero.

  1. Please make sure you have access to the code of your website, so the content of your pages can be changed.
  2. Add the Javascript code to each page you want to monitor. Our advice is to add the script to the <HEAD> portion of your web pages. Placing the script inside the <HEAD> tags ensures that the script loads as early as possible. Early loading helps the monitor to capture as much of the appropriate timing data as possible.
  3. Ensure that the updated version of your website is accessible through the domain you specified in the URL field.
  4. RUM data will be tracked as soon as visitors are accessing your updated site. You should see data in the RUM overview dashboard right away, in real time.

Privacy concerns? We have a privacy page that explains how Uptrends protects user privacy, additional steps you can take to enhance user privacy, and a suggested addition to your privacy statement.


Uptrends makes the RUM script and the components the script uses available to you under a BSD (Berkeley Software Distribution) license. You can find the full text at

One script per website

Keep in mind that each script is specifically for a single website since it contains a sid which uniquely identifies the corresponding RUM website in your account. For each page view that Uptrends registers for a particular RUM website, we'll verify that the page view is, in fact, coming from the website domain that you specified. Let's take a look at an example of what we mean.
Example: Using as an example website, by default, we allow page views to come from both and If you also include the same script on a website hosted at or, RUM will not work on those other domains, for RUM doesn't register page views originating from other domains. Each website needs a separate RUM instance to maintain sensible data.

Essentially, if you want to track real user monitoring data on more than one website, you need to treat them as separate RUM websites in Uptrends as well. For each website domain you wish to monitor, you'll need to set up an additional RUM website, for each domain gets a different script.

The domain verification also means that RUM will only work in your real production environment. If you have separate development and test environments running locally or under a different domain, RUM will not register page views for those sites.

Note: Perhaps you have special circumstances where the exact same site does run on multiple domains, but you want to treat them as one. To set this up, please contact Support.