remove.bg - Remove the background of any image 100% automatically
Img.vision - Image hosting & video hosting for eCommerce sellers
Trace by Sticker Mule - Remove the background from any image for free
UploadHouse - Thumbnail and resize your photos and images
Unscreen - Remove video and GIF backgrounds 100% automatically
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.