What it is good for
Modern phone agents combine speech recognition, a language model and a synthetic voice, connected to your calendar or booking system. They sit in front of your existing number or phone system and answer when you cannot. The best case is a business that misses calls: a trades firm on job sites, a clinic front desk at lunch, a law office after five.
| Job | Fit | Why |
|---|---|---|
| Answering after hours and overflow | Good fit | The alternative is voicemail, and most callers do not leave one |
| Booking, rescheduling, hours, directions | Good fit | Structured, repetitive, easy to check |
| Taking a message and routing the call | Good fit | Needs a clean handoff to a person |
| Quoting prices or terms | Use with care | Only from a fixed list you control |
| Complaints, emergencies, anything legal or medical | Hand to a person | The cost of a wrong answer is too high |
| Outbound sales calls | High legal risk | Needs prior express consent under the TCPA |
What to check before choosing one
- Integration. Does it book directly into your calendar, practice management or field service software, or only take a message? Direct booking is where the value is.
- Handoff. How does a caller reach a person, and does the person get a summary first? Test by asking for a human mid-sentence.
- Guardrails. Can you restrict it to a fixed script of answers, prices and policies, so it cannot invent a discount or a diagnosis?
- Your number. Can it work with your existing number and phone system? See our business phone guide and the telephone register.
- Data. Where recordings and transcripts are stored, for how long, and whether the vendor uses them to train its models. Health practices need a business associate agreement under HIPAA before any vendor handles patient calls.
- Pricing. Usually a monthly fee plus per-minute or per-call charges. Estimate with your real call volume, including spam calls it will answer too.
The rules that apply
Outbound calls and the TCPA
The Telephone Consumer Protection Act restricts calls made with an "artificial or prerecorded voice." In a February 2024 declaratory ruling, the FCC confirmed that AI-generated voices, including voice clones, count as "artificial" under the TCPA. The practical effect: an AI agent placing calls to consumers generally needs the called party's prior express consent, and prior express written consent where the call is telemarketing, along with the identification and opt-out requirements that apply to prerecorded calls. TCPA claims can carry statutory damages per call, and class actions are common.
Inbound answering is lower risk, because the caller dialed you. Follow-up calls or texts the agent sends afterward are outbound and fall back under these rules. Check with a lawyer before any outbound use.
Recording consent
Almost every AI phone agent records or transcribes the call. Federal law and most states allow recording when one party to the call consents, and your business is a party. A group of states require the consent of everyone on the call, including California, Florida, Illinois, Maryland, Massachusetts, Pennsylvania and Washington. When callers may be in any state, the safe practice is to treat every call as all-party: announce at the start that the call is recorded and may be handled by an automated assistant.
Telling callers they are talking to AI
California's bot disclosure law, written for bots online, bars using a bot to mislead a person about its artificial identity in order to encourage a sale or influence a vote, unless the bot discloses what it is. A phone line may fall outside its wording, but other states have passed or are considering AI disclosure rules, and the list changes. A short, plain disclosure in the greeting satisfies the cautious reading of all of them and costs nothing.
This page describes the rules in general terms and is not legal advice. Regulated industries (health care, finance, debt collection, legal services) have further requirements. Check with a lawyer before launch.
Before you buy
- Count the calls you miss today, by hour. That is the value case.
- Decide what the agent may say, and write the fixed answers for prices and policies.
- Test the handoff to a person, from a real phone, at the busiest time of day.
- Put recording and AI disclosure in the greeting for every call.
- Keep outbound calling off unless a lawyer has reviewed your consent records.
- Read the vendor's retention and training terms, and get a BAA if you handle patient calls.
- Record the tool and its rules in your AI use policy.