Check out http://metaphor.systems/ http://metaphor.systems/ - neural embeddings based search that is really good at finding the longtail of high quality content

Check out http://metaphor.systems/ http://metaphor.systems/ - neural embeddings based search that is really good at finding the longtail of high quality content. Really good for finding personal pages, niche blog posts, etc.. Algorithm doesn't at all weigh website popularity explicitly. (Disclaimer: I'm one of the cofounders)