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.
You should use the Bcc (blind carbon copy) function found in all mail software, web- or app-based.

“A blind carbon copy (Bcc) of any correspondence is sent when you wish to conceal the fact that there are other recipients of the message. You might do this to discretely let somebody else in on a conversation, to send email to a list without sharing everybody's email or involvement with everybody else, or any other situation where you might desire a bit of privacy.”

From:

https://m.wikihow.com/Use-BCC-in-an-Email