reverse-image
PimEyes
A face-recognition search engine covering roughly 3.5 billion face images from the open web: upload a photo of a face and it finds other pictures of the same person. It runs through the website only, and actually viewing results requires a paid subscription; there is no public API. Used in person-identification research when ordinary reverse-image search is not face-aware enough.
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Search this archive
No programmatic check — opens the archive’s own search.
Why it’s useful & how it works
Page via proxy; viewing results requires paid login + bot-protection. Link-only at best.
What’s inside
~3.5B face images.
Access
May require solving a captcha before it responds.