Shoppers assume one store is reliably the cheapest. The prices say otherwise. This Lengow study, powered by NetRivals, is the first edition of Price Radar: it compares 328,840 identical products (matched by barcode, EAN) across 375 online retailers active in France between January and May 2026, and names the retailers that come out cheapest in each category. Amazon is the single cheapest retailer more often than anyone else, on 18.8% of products. It still loses two categories out of four, and the price of the same product runs as much as 95% higher from one seller to the next.
What you’ll discover in this study:
The cheapest retailer in every category: the Top 8 cheapest retailers in each of Beauty & Health; Sport, Outdoor & Cycling; DIY, Home & Garden; and High-Tech, with the share of products where each comes out cheapest and a net score for every entry.
Why Amazon's 18.8% doesn't make it cheapest everywhere: Amazon is the single cheapest retailer on 18.8% of all products, more than any rival, yet it tops only High-Tech (30.3%) and DIY (22.6%), sits third in Sport behind Bike24 and Deporvillage, and falls to eighth in Beauty behind Perfumesclub.
The net cheap score, who's really cheapest versus who just looks it: a metric that separates retailers that are systematically the value option from marketplaces that look cheap on a handful of products but rank most expensive far more often, Rueducommerce (−19) and Auchan (−11) among them.
