Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Whappext - Whappext is an online marketing platform that helps users to send bulk messages to millions of users for the marketing of their brands.
WhatsApp Desktop - WhatsApp, now on your desktop
WAAM-it Sender - WAAM-it Sender is a WhatsApp marketing software that enables users to send messages from their system and smartphones anytime, anywhere.
Wafer Messenger - Endless Creativity, Limitless Reach.
Kaleyra - Kaleyra is a platform that helps developers to build SMS and voice messaging applications for a global scale.