Octopush - Octopush is a company providing technology-based communication solutions, including SMS, Web solutions, and Email APIs.
Twinme - Twinme – Private Messenger is a free, secure, instant, and high-definition messaging app that protects your privacy along with giving you full control over each of your relationships and contents.
E-goi - Email Marketing companies, SMS Marketing, software email marketing.
Textra - Textra is a seriously beautiful, feature rich SMS and MMS app.
Maytapi - Serverless Whatsapp Api with Chat and Agent support.
Material Messaging - Material Messaging is a beautiful communication app that lets you send and receive SMS and MMS messages using the intuitive interface while giving you complete control over every aspect of your messaging experience.