Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Influitive - Influitive helps companies increase customer lifetime value and accelerate sales with the power of their own customer advocates. Inspire your customers to stay longer, share their experiences, and attract new business.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Plivo - Plivo simplifies your customer engagement.