Google Reverse Search, available at reverse.photos, lets you search by images instead of keywords. Upload a picture from your desktop, tablet or mobile phone, and Google will show all the other web pages on the Internet that have similar images.
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Profacefinder Alternatives
Profacefinder is described as 'Face recognition and reverse image search engine' and is an app in the online services category. There are more than 25 alternatives to Profacefinder for a variety of platforms, including Web-based, Android, Google Chrome, Mozilla Firefox and iPhone apps. The best Profacefinder alternative is TinEye. It's not free, so if you're looking for a free alternative, you could try TinEye or Search by Image. Other great apps like Profacefinder are PimEyes, SauceNAO, Yandex.Images and NooBox.