SendBox – Global Messaging Platform for CRM & Retention Teams (SMS / WhatsApp / Telegram)

Hi everyone!
We’ve been testing a platform that helps run automated messaging campaigns across SMS, WhatsApp, and Telegram, covering 200+ GEOs.
The service is called SendBox - built for CRM and retention teams to re-engage users, boost activity, and manage promo flows easily through API or automation.

It’s not a traffic source, more like a communication layer between brands and their users.
Would love to hear what tools others use for mass messaging or retention campaigns, always interesting to compare results and delivery rates.

If anyone’s curious to try it out or see how it works, feel free to DM me.