Overage example: On the base plan, 60 rescued calls in a 4-week period — the first 50 are included and 10 × $6 = $60 extra.
Why not a $99 generic AI receptionist? They exist — and they’ll quote your customer a price, promise an arrival time, and embarrass your shop by Tuesday. Waterline costs more because it’s allowed to do less: no prices, no diagnoses, no promises — it captures the job, rings you, and nothing else.
Risk floor: It only ever touches calls you were already missing. It cannot lose you a customer you would have answered. Worst case, you’re back to voicemail.