Twilio - Brings voice and messaging to your web and mobile applications.
Maytapi - Serverless Whatsapp Api with Chat and Agent support.
Octopush - Octopush is a company providing technology-based communication solutions, including SMS, Web solutions, and Email APIs.
Swift SMS Gateway - SMS Gateway is your bridge between the Internet and the world of cell phone SMS text messaging.
SMS Messaging - SMS Marketing is a social media management tool by Mitto that helps brands and retailers capture their customers’ attention by crafting messaging campaigns across multiple platforms.
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.