Segment is the more common of the two in our index: it runs on 876 websites against 786 for Adobe Experience Platform Identity Service, and 21 sites use both. Counts come from real scans, not vendor claims.
Adobe Experience Platform Identity Service creates identity graphs that hold customer profiles and the known identifiers that belong to individual consumers.
Segment is a customer data platform (CDP) that helps you collect, clean, and control your customer data.
21 sites run both Adobe Experience Platform Identity Service and Segment. That is 3% of the sites using Adobe Experience Platform Identity Service, the smaller of the two.
Want to know which one a particular site uses? Look it up and see its whole stack, or compare two sites side by side.