Imgur is described as 'free and simple image hosting service with image editing feature. Signup is optional. Imgur is pronounced like image-er; imager' and is a very popular Image Hosting Service in the Photos & Graphics category. There are more than 100 alternatives to Imgur for a variety of platforms, including Online / Web-based, Windows, iPhone, Mac and Android. The best alternative is Pixelfed, which is both free and Open Source. Other great apps like Imgur are Flickr (Freemium), 500px (Freemium), Pixabay (Free) and PostImage.org (Freemium).
Pixelfed is an image sharing platform with focus on Privacy, Safety and Security, an ethical alternative to centralized platforms like Instagram. Federated, Ad-Free, No algorithms, No 3rd party analytics or tracking. Can run on your own server.
500px lets you create stunning professional photo portfolios, find friends, express yourself and connect with likeminded people. It was co-founded by Oleg Gutsol and Evgeny Tchebotarev on Halloween 2009 and 15 million users as of September 2018.