Its free tier makes it easy to trial. Smith.ai also sells human receptionist plans, so you can move up to live staff if the AI isn't enough. Prices are per call, not per minute.
law firms · general · medical clinics · real estate · accountants · auto repair · human backup
Plans & source
Free: 25 calls/mo, then US$3.00/call. Pro: $150/mo for 75 calls (~$2.00/call). Enterprise: $500/mo for 300 calls (~$1.67/call). Volume discounts on higher call packs.