saucenao.com/

I believe that this can be a major contributor for adding sources to posts and by extension the original artists.
Just copy the post's URL and add it under 'advanced options' and then click 'get sauce' and it should automatically find the Pixiv post most similar.

What do you think? Just found this on tumblr.

Thats a pretty sweet site, i like it.

ffffffffffffffffffffff I love this and the person who made this and you for showing this to us.

Hi there .o/

Well from what I've seen so far, it seems like SauceNao mostly finds explicit rated pictures, which don't look that much like whatever I uploaded there ^^'

From my experience, iqdb.org is much more reliable.

But iqdb.org does not find you the source/artist. Only other booru that has the image.

True, however the source often is given on those booru, or you may request them here.
You may get the answer from the uploader, provided they were not just taken from another booru using some kinda script.