What PornstarByFace offers
A photo or screenshot fed into the site's search is run through a face-matching engine the site says is built on deep neural networks, and the performers in its database that most closely resemble the person in the image come back as results. The site frames this around two jobs — putting a name to a performer seen in a scene or on a social feed, and surfacing look-alike or doppelgänger performers for viewers chasing a particular type.
Those matches tie into a performer directory maintained alongside the search tool. The site's girls index lists adult performers with photos, bios, galleries, and video clips, so an identified face becomes a starting point for exploring that performer's material rather than a dead end.
Accuracy depends on the reference photo and on how well the person is represented in the database, and matches are similarity results rather than confirmed identities — useful leads, not verdicts. That makes PornstarByFace most practical for the user holding an image and nothing else: a screenshot with no scene title, no studio, and no name to type into a conventional search bar.