Your Customer List Is Full of Duplicates. Here's How to Find Them in Postgres.

Every CRM quietly fills up with the same person entered three different ways — and you pay for it in wasted marketing, wrong reports, and split histories. I measured three ways to find the duplicates on 5,000 labeled records: plain exact match, Postgres fuzzy matching, and AI embeddings. The boring one won — exact numbers, where each method wins, and why you don't need a data-quality platform.