Twilio - Brings voice and messaging to your web and mobile applications.

Square - Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!

Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates

Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution

Plivo - Plivo simplifies your customer engagement.

Heartland Retail - Heartland Retail (previously Springboard Retail) POS software a robust, user-friendly cloud point of sale solution designed for the business of retail. A complete retail management platform built for growing single, multi and franchise brands.