Download websites that use Optimise

About Optimise

Affiliate tracking leaves a mark on two very different kinds of site. On an advertiser's domain the code sits near the end of a checkout to record which partner earned the sale. On a publisher's domain the same network appears in outbound links carrying a tracking identifier. As of October 2026 we detect Optimise on 774 sites, and the list mixes both roles.

Optimise has run the network since 2000, a long stretch by the standards of performance marketing, and longevity matters commercially. A network that predates much of the current adtech stack has accumulated advertiser relationships that do not churn quickly, so the domains where its Proprietary tracking code appears tend to be established retail, finance and travel brands rather than experiments.

For anyone mapping the affiliate landscape, the question is rarely whether a particular brand uses a particular network. Brands publish their partner programs. The harder question is compositional: which networks travel together on the same advertiser, how many a single merchant runs in parallel, and which publisher categories a network's identifiers concentrate in. Answering it means seeing the whole set of domains at once with the rest of each site's technology profile attached, which is what the downloadable dataset provides and what a domain-at-a-time lookup structurally cannot.

Affiliate tags are among the harder categories to observe, and the caveat deserves stating in full. Conversion pixels fire on order confirmation pages a crawler does not reach, tag managers can inject the code only for traffic arriving with a partner parameter, and consent gating suppresses it in some regions entirely. Everything in the count is a site where the code was actually seen, so the population is real, but it under-represents the network's advertiser base rather than overstating it. Nor should presence be read as exclusivity, since running several networks alongside each other is normal practice.

Where the list earns its keep is direction of travel. Comparing exports over time shows advertisers adding a network, dropping one, or moving between them, and that movement is the part of the market neither a rate card nor a public partner page will tell you about.