Interviewed with the guys at Plaid a few weeks ago. They're doing awesome stuff, and the founders are some of the easiest guys to talk with. Definitely worth following. http://plaid.io

Augur is also really neat - they're a startup based in Atlanta, GA doing machine learning as a service (kinda). They basically grab data about your users from all around the internet, use that with data you supply to them, and then make that a service so you can feed in data, and get results back personalized to each of your users. It's a little hard to explain, but the founders are ridiculously talented. They've literally been funding the startup by going around the country and winning hackathons. http://augur.io/