WhatsMany - Send personalised WhatsApp messages in bulk
Clara - Clara is a virtual employee that schedules your meetings, getting you to the work that matters, faster.
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
Mia - Virtual assistant for meetings
Porterhouse - Send mass iMessage and SMS texts from your existing number with a single click!
x.ai - x.ai is a tool to schedule meetings for you and your team.