Coinbase - Bitcoin, safe and easy.
NativeX - NativeX, A One-Stop Mobile Solution
Binance - Cryptocurrencies exchange platform
Smaato - Smaato is a mobile-first platform and free ad server for publishers & app developers.
Poloniex - US-based cryptocurrency exchange with maximum security
Widespace Summit - Summit is a full-stack programmatic ad platform and marketplace designed specifically to deliver branding campaigns on mobile.