PicsLikeThat is described as 'This is a visual and semantic image search system finding images on Fotolia' and is an website in the Online Services category. There are more than 10 alternatives to PicsLikeThat, not only websites but also apps for a variety of platforms, including Google Chrome, Firefox, Mac and Linux. The best alternative is TinEye. It's not free, so if you're looking for a free alternative, you could try Google Images or Image Search Options. Other great sites and apps similar to PicsLikeThat are NooBox (Free, Open Source), Search by Image (Free, Open Source), SauceNAO (Free) and Yandex.Images (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.
Reverse image search on iPhone, iPad and iPod Touch. Safe Design app is a great tool to find stolen or un-attributed images on the internet. Last check dates, search by name, customizable notifications, icon badges and more.