Twilio - Brings voice and messaging to your web and mobile applications.
SupportYourApp - Connecting talented people with the blooming IT industry to help them grow faster by outsourcing support.
Plivo - Plivo simplifies your customer engagement.
Influx - Customer support as a service
Tellephant - Helping you build incredible chatbots and integrate WhatsApp, Google, Facebook, SMS and more to your communication stack in seconds. All at the cheapest rates out there.
79ecommerce - 79ecommerce provides eCommerce customer support services.