Coinbase - Bitcoin, safe and easy.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Binance - Cryptocurrencies exchange platform
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Poloniex - US-based cryptocurrency exchange with maximum security
Plivo - Plivo simplifies your customer engagement.