Sending same text to many people, nobody sees other recipients

I'm trying to organize a club/business and would like to send the same text to my clientele. I do not want individual recipients to see who else is a recipient, as most clients don't know each other. This implies I also don't want recipients to see other recipients's replies and that they would ideally go to me. Not being able to reply at all is not a deal breaker. If such a feature exists directly in the iPhone/on my Mac, can somebody explain how to implement it/link me to a previous question? If the feature doesn't exist, can I get suggestions for 3rd party applications or websites to send texts so clients don't have their numbers shared? I've been searching for a couple hours, and nothing featuring recipient anonymity has popped up. Thank you. **EDIT: PLEASE READ** Thank you for the suggestions thus far, but I am not looking for any messaging medium besides text. If the feature or application does not apply to what we consider texts received on a phone, it's not what I'm looking for.