Why are most AI receptionists not free?
Because voice costs money on every single call. A phone receptionist has to hold a line open, transcribe speech in real time, generate a spoken reply and send it back fast enough that the caller does not think the line dropped. Every one of those steps is billed per minute by someone.
That gives voice products a hard floor. They cannot give away an unlimited free tier because each free call has a real, unavoidable unit cost. So the free tier becomes a trial: a few days, or a small pool of minutes, after which the meter starts.
This is why the word “free” in this category so often means “free for now”. It is not deception; it is arithmetic.
Why can a WhatsApp receptionist be free?
The arithmetic changes on WhatsApp. When your client messages you first, Meta opens a 24-hour customer service window, and under Meta's current published rules service replies and utility replies inside that window are not charged.
Most booking conversations happen entirely inside that window: a client asks about Thursday, gets offered two slots, picks one, gets a confirmation. Nobody is billed per message for that exchange. The remaining cost is the software doing the thinking, which is a fixed cost that can be spread rather than a per-conversation one.
You only meet Meta fees if you opt into something chargeable, such as a reminder sent after the window has closed. That should be explained to you before it is switched on, and it should be passed through without markup.
What does a genuinely free plan include?
Elily's Free plan includes 150 AI replies each month. It has no booking cap, so those replies can turn into as many appointments as they turn into. It does not expire, and it is not a trial that converts.
Being specific about the limits matters more than the headline. On Free, Elily answers questions and books appointments, and your Elily branding stays on. Removing that branding is on Lite. Reminders, no-show follow-ups, approval controls, multi-staff calendars and additional locations are on Pro.
That is the honest shape of it: the free tier is a real working front desk for a single-calendar business, and the paid tiers buy volume and the operational controls a busier team needs.
What should you check before trusting the word “free”?
Five questions separate a free plan from a trial. Does it expire, and on what date? Does it cap the thing that makes you money, meaning bookings, or only the thing that costs the vendor money, meaning replies? Do you keep your own number and your own Meta account, or does the vendor hold them? Can you export your data and leave? And what exactly happens on the day you exceed the allowance — does the service stop, or does a bill appear?
The last one is worth pressing on. A plan that silently starts charging when traffic spikes is not free, it is deferred. Your plan price should not change on its own, and unusual traffic should trigger a conversation rather than an invoice.
