TextBlast Bulk SMS - Send personalized mass messages easily
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Porterhouse - Send mass iMessage and SMS texts from your existing number with a single click!
Twilio Flex - The programmable contact center platform 📱
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
Drift - A messaging app that helps you grow your business.