It has been a while since we've been searching for a good way to send messages to WhatsApp. Wassenger is a gift from heaven for transational messages and notifications. If its half as good as it sounds, its by far the best we've seen yet.
Great UI, great support and fine pricing
The number setup process was a little time consuming
So far I never banned by WA when use this, it's good. But the bad thing is too much delay when sending a message, so it can't use for OTP.
The fastest WA application I ever use is chat-api.com, but it more easily banned by whatsapp.
Easy to use, great support
Too much delay when send a whatsapp message
Until you finalize the purchase is good.
I've already left 3 emails, a chat message, and nothing, my company is standing still.