How to set up an AI receptionist to answer calls

By the end of this guide you will have an AI receptionist answering your business calls: it picks up when you cannot, answers common questions from your own information, takes messages or books appointments, and hands urgent callers to a person. The job is done by an AI phone agent or answering service, which you configure with your business details, connect to your calendar and phone number, and test before real customers reach it.

The right way to set up an AI receptionist depends on how much you want to build yourself. This guide walks through the steps and compares seven options from our Automation and agents category, from simple answering services for owner-operators to voice agent platforms for teams with developers.

Key takeaways

• Decide what the receptionist may do (answer questions, take messages, book, transfer), write down the answers it needs, connect your calendar and number, then test with real calls before going live.
• The main decision is a finished answering service or a voice agent platform you build on: services such as Rosie and Milo are quicker, platforms such as Bland and Synthflow offer more control.
• Costs vary by model: monthly plans with included minutes, per-minute rates, or sales-led contracts that start at $30,000 annually.
• Tell callers they are speaking to an AI where required, and always give urgent or sensitive calls a route to a human.

What you need before you start

• A business phone number. Some tools provide numbers, others connect to your existing carrier or an account you bring, so check before you commit.
• Your business information. Opening hours, services, prices you are happy to quote, location, and answers to the ten questions callers ask most.
• A calendar. If you want bookings, you need Google Calendar or another calendar the tool supports.
• A human fallback. A person or number that urgent calls transfer to.
• Time. A simple answering service can be set up in under an hour. A custom voice agent build takes longer, and done-for-you services quote their own timelines.
• Difficulty. Easy for answering services, moderate to hard for developer platforms.

Which kind of AI tool fits this job

Choose by who will set it up and how complex your calls are.

An answering service for owner-operators. Rosie answers inbound calls around the clock, takes messages, answers questions using details from your website and Google profile, screens spam, and texts you a summary. Depending on the plan it can book into Google Calendar, Calendly, Appointlet or Acuity and transfer calls. Milo is a done-for-you service: its team audits your workflows and sets up a receptionist, follow-up agent and scheduling agent for small service businesses.

A business phone system with an AI agent. Quo (formerly OpenPhone) gives small teams shared numbers, calling and texting, with an AI agent called Sona that answers calls. It also adds call summaries, transcripts and phone menus on higher plans. This suits you if you also need a phone system, not just an answering layer.

A front desk agent across phone, text and chat. Twig centres on Sera, an AI front desk that answers phone calls, texts and website chats, books appointments, recovers missed calls and hands difficult conversations to a person.

A voice agent platform. Bland lets you design call flows in a visual builder with tool calls and API integration, plus transfers to human agents. Synthflow links phone agents to CRM, calendar and webhook systems, with escalation paths and handoffs. Harmony.ai focuses on sales and customer teams, with a no-code builder, lead qualification and meeting booking. Choose these when you have volume, regulated calls or developers.

Step 1: List what your receptionist should and should not do

You finish with a short scope that keeps the setup honest.

1. Write the tasks you want automated: answering FAQs, taking messages, booking appointments, filtering spam.
2. Write what must go to a person: complaints, emergencies, legal or medical questions, anything involving payments.
3. Note your hours, so you know whether the agent covers only after-hours and overflow or every call.
4. Decide what the agent may say about prices.

Check it worked by reading the list as a caller would and confirming nobody would be left without an answer or a person.

Step 2: Gather the answers and information it needs

An AI receptionist is only as helpful as the material you give it.

1. Collect your hours, locations, services, policies and common questions into one document.
2. Check your website and Google business profile are current, because Rosie, for example, draws on both.
3. Decide on a greeting and the name the agent uses. Rosie lists 10+ voices with a custom name and greeting, so look for similar controls in your choice.
4. Prepare the booking rules: appointment types, length and buffer times.

Check it worked by asking a colleague to answer five typical caller questions using only your document.

Step 3: Choose a tool and plan

You end this step with an account or a conversation started with the vendor.

1. Match the tool to your situation using the section above and the comparison table below.
2. Compare how each tool charges. Rosie's Professional plan includes 250 minutes per month, Bland charges per minute, and Synthflow's enterprise contracts start at $30,000 annually.
3. Use free trials. Rosie has a 7-day free trial, Quo offers a 7-day free trial, Twig a 15-day free trial, and Milo a free 30-day pilot.
4. Check what each plan includes before you rely on a feature. For Rosie, direct calendar booking and call transfers need Scale or higher.

Check it worked by confirming the plan you picked includes booking and transfers if you need them.

Step 4: Connect your number, calendar and systems

Your receptionist needs a number to answer and a calendar to book into.

1. Set up the phone line. You may get a new number, forward your existing one, or bring a carrier. Bland lists bring-your-own Twilio account or SIP trunk.
2. Connect your calendar so the agent sees real availability.
3. Link a CRM if you want callers logged. Quo lists HubSpot and Salesforce, and Harmony.ai lists Salesforce, HubSpot and Monday.com.
4. Add your fallback contact for transfers and decide whether they are warm, live or messages only.

Check it worked by calling the number and confirming it rings through to the agent, and that a test booking appears on your calendar.

Step 5: Configure the greeting, answers and handoffs

This is where you shape what callers actually hear.

1. Enter the greeting, your business information and any rules about what to avoid saying.
2. Add the questions and approved answers from step 2.
3. Set the conditions that trigger a transfer or a message, such as urgent keywords or a caller asking for a person.
4. If you use a platform, build the call flow. Bland offers a visual builder called Conversational Pathways, and Harmony.ai has a no-code visual builder.
5. Decide whether the agent should disclose that it is an AI, and follow any rules where you operate.

Check it worked by reading the greeting aloud and confirming it names your business and gives a way to reach a person.

Step 6: Test with real calls before going live

Testing finds the gaps your document missed.

1. Call from different phones and ask normal questions, awkward questions and off-topic ones.
2. Try booking, rescheduling and asking for a person.
3. Read the call summaries or transcripts if the tool provides them. Rosie sends summaries by text and email, and Quo lists call summaries and transcripts on higher plans.
4. Fix wrong or vague answers in your source information, then call again.

Check it worked by completing three test calls where the answer, the booking and the transfer each work.

Step 7: Go live, then review calls weekly

Start with limited hours or overflow calls, then widen coverage once you trust it.

1. Switch on the agent for after-hours or overflow first.
2. Review summaries or recordings for the first few weeks.
3. Add missing answers and adjust handoff rules.
4. Watch usage. Plans include limited minutes or credits, and extra calls can cost more.

Check it worked by comparing missed calls and bookings before and after.

Tools for this job compared

Tool	Good fit for	Pricing	Stated limits
Rosie	Owner-operators in the US who miss calls (web, iOS, Android)	Free trial, paid from $49/mo (checked 24 Oct 2026)	Professional includes 250 minutes per month; booking and transfers need Scale or higher; custom training needs Growth
Quo (formerly OpenPhone)	Small teams that need a phone system plus an AI agent	Free trial, paid from $15/mo (checked 24 Oct 2026)	Sona calls use credits; US texting needs carrier registration; extra numbers cost $5 per month each
Milo	Small service businesses wanting a done-for-you setup	Free trial, paid from $30/mo (checked 24 Oct 2026)	Done-for-you service, not a self-serve app; pilot spots are limited; aimed at businesses of 5-100 employees
Twig	A front desk across phone, text and chat	Free trial, paid from $49/mo (checked 24 Oct 2026)	Allowances are capped per plan with overage billed; no free-forever plan; voice minutes count calls over 10 seconds
Synthflow	Enterprise phone agents with telephony and CRM links	Contact sales, from $30,000/yr (checked 24 Oct 2026)	Sales-led with no self-serve plan; enterprise contracts start at $30,000 annually
Bland	Developers and regulated teams building phone agents	Freemium, paid from $0.14, usage-based (checked 24 Oct 2026)	Start allows 100 calls per day and 10 concurrent calls; SMS, warm transfers and BAA are Enterprise only
Harmony.ai	Sales and customer teams needing lead calls and booking	Paid, from $0.39, usage-based (checked 24 Oct 2026)	Pro covers up to 3 agents, 10 concurrent calls and 100 calls per day; hot transfers need Enterprise

Prices and plan limits change, so confirm the current terms on each vendor's site before you subscribe.

Common mistakes to avoid

• Giving the agent too little information. An agent that lacks your policies guesses or deflects. Fix it by writing a proper source document and updating it whenever hours or prices change.
• Skipping the human route. Callers with emergencies or complaints need a person. Fix it by setting transfer rules and a message fallback, and check which plan includes transfers.
• Ignoring per-minute and add-on costs. Included minutes run out, and telephony or numbers may be billed separately. Fix it by estimating monthly call minutes and reading the plan's limits.
• Going live without testing. Phone conversations expose odd phrasing and wrong answers. Fix it by making real test calls from different phones before announcing the number.
• Forgetting call consent and privacy. Calls may be recorded and summarised, and callers may share personal data. Fix it by following the recording and disclosure rules where you operate, and by choosing a vendor whose data terms you have read.

How we put this together

This is an evidence-based guide built from each tool's listing in our directory, which is compiled from the vendor's own site and pricing page. It is not a review based on using the tools. We don't rank tools, and nobody paid to be included. Some outbound links may be affiliate links; see our disclosure.

Frequently asked questions

Can I set up an AI receptionist for free?

Not permanently, but you can try one without paying. Rosie and Quo each list a 7-day free trial, Twig has a 15-day free trial, and Milo offers a free 30-day pilot. Bland's Start plan is free to begin but charges per minute.

How long does it take to set up an AI receptionist?

The listings don't give setup times for the self-serve tools, so have your information ready before you start. Milo says its done-for-you setup usually takes 2-5 days. A platform build with call flows and integrations takes longer, so allow time for testing.

Can an AI receptionist book appointments?

Yes, several can. Rosie books directly into Google Calendar, Calendly, Appointlet or Acuity on higher plans, Twig books appointments by phone or chat, and Milo lists appointment booking synced with your calendar. Test the booking flow carefully before going live.

Will callers know they are talking to an AI?

Do not assume they will not. Rules on disclosure vary by place, so check the requirements where you operate, and consider telling callers up front. Always offer a route to a person for urgent or sensitive calls.

Is my customers' data private?

It depends on the vendor. Bland lists HIPAA with a signed BAA, SOC 2 Type II and GDPR, with the BAA on Enterprise only, while Synthflow lists MSA and DPA support. Read each vendor's data terms before routing health, financial or other sensitive calls.

Compare more options in our Automation and agents category.