Flickr - image and video hosting website
KeepSafe - Keep your entire photo library safely stored in an encrypted private cloud.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
AppLock (FOSS) - A privacy App lock FOSS application.
PhotoPrism.app - PhotoPrism® is an AI-Powered Photos App for the Decentralized Web. It makes use of the latest technologies to tag and find pictures automatically without getting in your way. You can run it at home, on a private server, or in the cloud.
Hexlock - Security app locker keeps apps private with smart profiles for any situation