Reverse.photos is described as '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'. There are more than 25 alternatives to Reverse.photos, not only websites but also apps for a variety of platforms, including iPhone, Google Chrome, Android and Mac. The best alternative is TinEye. It's not free, so if you're looking for a free alternative, you could try Google Images or Google Lens. Other great sites and apps similar to Reverse.photos are Image Search Options (Free), NooBox (Free, Open Source), Search by Image (Free, Open Source) and SauceNAO (Free).
Search by Image is a Firefox extension which enables you to initiate a reverse image search from the right-click context menu or the browser toolbar, and comes with support for more than 30 search engines.
SauceNAO is a reverse image search engine. The name 'SauceNAO' is derived from a slang form of "Need to know the source of this Now!" which has found common usage on image boards and other similar sites.
Multi-service image search Upload an image or thumbnail from a file or URL to find it (or similar images) among: Haruhi doujins (Haruhi doujins) Danbooru (anime artwork) Konachan (anime wallpapers) Moe.imouto.