Y Combinator-backed startup San Francisco Open Exchange (SFOX) is an online trading platform that helps people find the best bitcoin prices at various exchanges. In other words, it would like to help you buy, sell and invest in bitcoin exchanges kinda like and investor buys and sells stock on E-Trade.

Co-founder Akbar Thobhani left his job at Airbnb to create this platform. However, he soon found that using bitcoin was even more expensive than using credit cards. This is because there’s not a lot of transparency. So he started thinking that if he could find a way to compare prices this would help drive widespread adoption for the bitcoin market.