Porterhouse - Send mass iMessage and SMS texts from your existing number with a single click!
Botnik - This Slack bot helps your team build transparency & empathy
WhatsMany - Send personalised WhatsApp messages in bulk
TextBlast Bulk SMS - Send personalized mass messages easily
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
PushPrime - Supercharge your website with push notifications