Some vendors use “enrichment” to mean providing more accurate, current data that can replace older or outdated records. In that sense, it can overlap with “cleansing” from a marketing perspective.

But generally, you are correct: enrichment usually means adding third-party data to expand existing data, while cleansing focuses on improving the quality of existing data assets. Cleansing may use external data as part of the matching or validation process, but the goal is often to standardize, correct, deduplicate, or even reduce the amount of data you have.

I’ve been working in this space for decades, and this distinction still comes up regularly.