Why cookieless by default

Most sites add a cookie banner because their analytics stores an identifier in the visitor's browser. atrby doesn't, by default.

When a page loads, our server combines a random salt, your site, and the visitor's network address and browser into a one-way hash. The salt changes every day and the old one is deleted, so yesterday's ids can't be recreated and nobody, including us, can follow a person across days.

A person who visits on Monday and again on Thursday counts as two visitors. For revenue, that gap is closed differently: pass atrby.ids() into checkout and call atrby.identify() at sign-up, and the payment is matched to the visit that started it.

Long sales cycles where you need to follow anonymous visitors over weeks. Switch the site to cookie mode in settings and show a consent banner in the EU and UK first.