Have you tried a WhatsApp-bridge with element/matrix? You could use matrix internally while being available to clients via WA. I would strongly discourage any company to use meta-clients internally.
I'm having a bit of a... culture shock? Not sure how to call it. We're a small company from an eastern european country, building one product and trying to make it into the big world. We don't have the luxury of caring about if a messenger app is meta or not. Is it doing its job? yes. Is it encrypted? Sortof, but truth be told we'd use it anyways.
If we have extra time we spend it on checking backups, or improving performance, or researching new cool stuff we can add to our product. Which messenger app to use?! Yeah, definitely culture shock. Severe, too.
Have you tried a WhatsApp-bridge with element/matrix? You could use matrix internally while being available to clients via WA. I would strongly discourage any company to use meta-clients internally.