This is a tricky question as WhatsApp as there is no limit but that also doesn’t mean that you send a ton of messages to everyone.
Whats the Limit in WASender While Sending Multiple WhatsApp Messages?
As mentioned above, there is no limit from our side however WhatsApp might ban your number temporarily if too many people report you as spam in a single day!
So be careful about the number banning aspect. We do not take responsibility for number blocking!