Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Promote Route - A Better WhatsApp™ Experience
Plivo - Plivo simplifies your customer engagement.
IG MASS DMS - Seamlessly reach any target audience by using our mass dm software.