Security

Built with security in mind

Our business relies on trust: trust that you can safely run Optimizely's technology on your website. We take this trust very seriously. To that end, we have many processes in place to ensure that the code snippet running on your website does no harm.

  • your code snippet is unique to your account
  • your code snippet only updates whenever you save an experiment
  • we use Selenium and JavaScript unit tests to catch regressions
  • your code snippet is fetched over https if your page is https, and over http otherwise

Optimized for page load speed

On the internet, page load time is critical. Since the Optimizely code snippet needs to load before your page, we have a duty to minimize the load time of our snippet.

  • the code snippet is compressed with the Google Closure Compiler
  • the typical code snippet is ~35kb and loads in ~120 ms
  • we host the code snippet on Akamai's content delivery network (CDN)
  • tracking requests are made asynchronously and don't affect page load time
  • uploaded images are loaded with the rest of your site's images and won't block page load
  • uptime monitoring is available for Gold and Platinum customers

Trusted by thousands every day

Every day, thousands of companies use Optimizely on their website, generating massive amounts of analytics data. We are a team of qualified professionals working for our customers, and we hope you will become our customer too.

Something went wrong.

If this error persists, please let us know at our support page.

Our engineering team has been notified.

Browser Compatibility

You are currently using a browser that is not supported by Optimizely's editor. Please try using one of the following instead:

  • Chrome 20+
  • Firefox 4+
  • Internet Explorer 10+
  • Safari 5+

Create a free accountCreate a free Optimizely account

You're seconds away from running A/B tests!By creating an account you can post in Optiverse and test drive Optimizely

Already have an Optimizely account?

Create Experiment

Your new experiment will appear under "DRAFTS" until you start it. Then it will appear under "ACTIVE".

Enter a URL below to get started on a new experiment!

Create iOS Experiment

Your new experiment will appear under "DRAFTS" until you start it. Then it will appear under "ACTIVE".

Forgot Password

We'll send you an email with a link to reset your password.

Implementing Optimizely

Copy this code and paste it immediately after your opening <head> tag:

Because you are using the Shopify App, the Optimizely embed code is already added to your shop automatically!

If you want to run Optimizely on a page NOT hosted by Shopify, copy & paste this code snippet to the top of the <head> tag:

Copy to Clipboard
Send to Developer

Include this snippet on every page you want to run experiments on and track as a goal. This snippet will not change. Note the //cdn prefix is NOT a typo.

To add new projects, go to the Dashboard.

Each project has a unique Project Code snippet that must be included on every page running experiments or being tracked as a goal.

Your account has more than one project, so be sure to add the correct snippet. To view your projects and project codes, go to the Dashboard.

Click on Project Code to get your snippet:

For advanced implementations, see our API Documentation.

Send Code to Developer

Does someone else on your team implement the coding of your site? Put their email address below to send them instructions on how to implement Optimizely on your site.

Sign in to Optimizely