If you collect mobile numbers from your users, you might want to use your CRM/marketing tool to send texts to your users. Texts get way better response rates than emails and are pretty much guaranteed delivery. With one big downside: Each text costs a fraction of a send. Which really adds up when you bulk send.
I've built Automata (https://getautomata.app) to make iMessage and SMS sends way more economical. 100% free if you send <10k messages a month.
How?
Well, you will need 3 things:
After you install the Automata mac app, you will be able to use the Automata API to control your iPhone, through your Mac, to send, receive, and log iMessage and SMS.
Use the API to connect to your CRM/marketing platform/Zapier/Make and you got yourself free iMessage and SMS marketing. Easy.