Qiscus - Engage your customers from your own apps and mainstream chat apps like Whatsapp, LINE, Facebook Messenger, Telegram, Email, Twitter, Instagram, etc. and centralize all chats into a single dashboard.
Clearstream - Clearstream is a SMS marketing and online texting software.
Skygear Chat - Build full-featured messaging apps fast.
E-goi - Email Marketing companies, SMS Marketing, software email marketing.
WeChat API - WeChat API and SDK allow developers to access and integrate the functionality of WeChat with other applications.
Swift SMS Gateway - SMS Gateway is your bridge between the Internet and the world of cell phone SMS text messaging.