Instagram doesn’t allow you to directly search users by Image.
The best way to search users by image is using reverse images search engines.
1. TinEye – the best free reverse images search engine. upload a picture and get all the public places it appears online.
2. Social Catfish – another reverse images search engine, dedicated to social networks. The service costs $27.47/mo
3. PimEyes – reverse image search specializes in face images.
If we’ve found a suspicious profile that we’d like to verify, use Microsoft’s Face tool to check if the user in the photo is the same person.