Every SMS platform sends messages. None of them reply. Monster SMS is the first Australian SMS platform with built-in AI agents that handle customer responses automatically - confirming appointments, following up quotes, answering FAQs - 24/7, without you touching your phone. What's different: AI auto-reply agents on every plan (even free). Set up in under 3 minutes. 100% Australian-hosted. Spam Act compliant. Starting from 5¢/msg. Free plan: 100 messages, no credit card needed.