What is the Randomizer?

Mautic’s Randomizer feature enables users to randomly select contacts from a pre-defined segment. The primary use case is for marketers who want to send a special offer to a small group of contacts. The Randomizer can also enable more powerful, yet manual, A/B testing in campaigns.


Mautic Customer Success Managers must enable the Randomizer feature for customers. If you’d like to use the Randomizer, request access from your CSM.

Once the feature is enabled in your instance, you’ll need to create the parent segment from which you want to select a random group of contacts. If you want to keep that parent segment intact, clone it so you have a duplicate to use for randomization.

In edit mode for the segment you want to randomize, click the Randomize button in the top right corner. You’ll see this box:

Randomize and Save

Enter the number of contacts you’d like in the random segment, and click Randomize.

To disable the randomization and return your segment to its full capacity, enter 0 and click Randomize.