Altagonist
7.8#1 in ai alt text generatorsFrom €5 a monthFree planWebSelf-hostedWindows
VisitIt suits WordPress site owners who need to generate alt text in batches or across multiple languages. It also offers automatic generation on upload and manual editing in the media library.
ALTer suits people who want to request alt descriptions for images on pages they visit, including pages they do not control. It is relevant to users seeking screen-reader access to those descriptions.