Adobe Experience Platform Identity Service is the more common of the two in our index: it runs on 786 websites against 99 for mParticle, and 20 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.
mParticle is a mobile-focused event tracking and data ingestion tool.
20 sites run both Adobe Experience Platform Identity Service and mParticle. That is 20% of the sites using mParticle, 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.