The powerful CDP Segment (made by Twilio) has a module called Engage which powers its audiences: https://segment.com/docs/engage/

We're looking at the potential of allowing users to connect to Segment, and pull in their audiences. This means using real people audiences within our when using our Experience Blocks to personalize WordPress content.

Below a sample of the Segment GUI allowing you to create custom audiences.

Please let us know if you have any interest.