Download websites that use Usizy

About Usizy

Apparel is the one retail category where customers routinely buy the same item twice on purpose. Two sizes go in the basket, one comes back, and the retailer pays shipping in both directions plus handling, inspection and the markdown on whatever cannot be resold as new. Fit recommendation software exists to attack that specific line item, and Usizy sits in that niche, recorded as an Personalisation tool from Usizy and delivered as JavaScript that runs on the product page while the shopper is still choosing.

Presence of a tool like this narrows down the merchant considerably. A shop with one product line does not need it, and neither does a retailer whose returns are rare enough to absorb quietly. Fit software becomes worth paying for when a catalogue spans many brands whose sizing disagrees, when return rates are high enough to show up in the margin, and when somebody in the business has done the arithmetic on what a fraction of a percent of returns is worth. A detection is therefore a signal about the merchant's scale and sophistication, not only about their software.

As of October 2026 we detect Usizy on 26 sites. The number is a floor rather than a customer count. Fit widgets are usually injected on product pages only, sometimes rendered after a shopper interaction, and increasingly served through the merchant's own domain rather than the vendor's, all of which can hide the fingerprint from a crawl that sees a homepage and moves on. A shop can be a paying customer for a full year and appear in none of our snapshots.

Our record puts Usizy in the market since 2018 under a Proprietary license, long enough to have lived through the shift from measurement based sizing towards recommendation driven by purchase and return history. Vendors in this niche compete mainly on data volume, because a model that has seen more real orders for a given brand predicts better than one that has not, which makes the installed base both the asset and the thing a competitor is trying to take. A list of merchants using any one such vendor is commercially loaded on both sides of that fight.

A per-domain check tells you what one shop runs today. The downloadable dataset answers the questions that only exist at population scale: which retailers have bought fit technology at all, which ecommerce platforms and payment stacks they pair it with, which markets the adopters sit in, and how the set shifts between snapshots as merchants switch vendors or drop the category entirely.