Missed call text back sends a text to the caller you just missed, in seconds, from your business number, before they call the next business on the list. The caller replies by text and the conversation lands in one inbox with your calls, Yelp messages and web forms. It needs a business number registered for texting so the message delivers; The Viridia System includes the number, the registration, the AI receptionist that answers the call in the first place, and the follow-up that runs if the caller goes quiet. $897 a month, month to month.