Reliable Long-term Image Hosting Sites That Will Stand the Test of Time

This is a list of reliable image hosts with a good track record and more than a few years under the belt. All image hosts on this list support hotlinking.

Imgur will not be listed here since it's gradually turning worse in its quest to transcend from a mere image host into a social network. For example, direct links to Imgur images redirect to the image post's page on mobile instead of the image itself nowadays so that it can show ads, get visitors to click on trending images in the sidebar, and interact with the community via the comment section of images.

A website that definitely belongs on this list, but can't be listed on AlternativeTo since it is not available in English is German image host, which has been operating since 2006 and was as far as I know the first image host that allowed hosting of really large images. The current file size limit is 10 MB.