With Retell, weβve increased scheduling NPS by 38%, and filled underutilized provider capacity, allowing our team to focus on meaningful patient care instead of phone tag.
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Call center answering service that picks up on the first ring
5.0
ON G2
Retell AI answers every call to your call center line, handles overflow and after-hours coverage, and hands off to a person with the full transcript when it needs to. Callers ask whether it sounds like a real person, so listen first and decide for yourself.
Trusted by over 4,000 businesses powering 100+ million calls per month.
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How It Works
Launch your call center answering service in four steps.
Configure the agent
Build it yourself on the API and SDK, or have our team build it for you. Both paths are real products, and this is the question prospects ask most often after the voice itself. Configure greeting, routing, escalation, and the caller questions it should answer, against one knowledge base.
Test it on real call scenarios
Run the agent against the calls you actually get, including an overflow spike that blows your service level, before it touches a live line. Each run scores accuracy and flags where the agent guesses instead of checking your data.
Connect your number and go live
Keep your existing phone number and port or forward it, or take a new one. Go live on one line or one location, confirm the caller experience, then expand.
Monitor and retrain
Every call is transcribed, scored, and dispositioned. Listen live while a call is in progress, review the transcript after, and retrain the agent from the calls it handled badly.
Use Cases
What the agent handles for BPOs and call centers
The call that cannot wait: an overflow spike that blows your service level
It absorbs the tier-1 volume, resolves what it can, and warm transfers the rest with the full transcript attached. It is configured per client program rather than one global script.
Does an AI call center answering service sound like a real person?
It is the same job, run by a voice agent instead of a message-taking service. The agent holds a conversation, answers the caller's question from your own data, and completes the task on the call. A traditional service takes a message and passes it on, which leaves the work still to do.
The calls it handles for BPOs and call centers
It covers overflow and after-hours coverage, tier-1 deflection, callback scheduling, warm transfer with context, and disposition and wrap-up. It recognizes the vocabulary your callers actually use, including service level, AHT, overflow, warm transfer.
What are you losing after hours today?
Volume is spiky by design, and staffing to peak is what destroys the margin on a per-seat contract. Every call the agent answers is one that is not waiting in a voicemail box, and it works the same at 2am as it does at 2pm.
Does it connect to Twilio?
It reads and writes to the systems you already run, including Twilio, Genesys, Five9, Salesforce, and Zendesk. Bookings, notes, and dispositions land in the record rather than in a separate inbox.
What happens when it does not know the answer?
It transfers to a person and passes the full context, so the caller does not repeat themselves. You can listen to any call live while it is happening, and every call is transcribed and dispositioned automatically.
Built for Contact Centers, Not Demos
Retell is the AI Voice Platform Enterprise Contact Centers Run On
Retell lets you build, test and deploy AI phone agents that handle real call volume, so your team spends its time on the conversations that need a person.
Feature
Why BPOs and call centers choose Retell AI over a message-taking service
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- Hubspot
- Twilio
- Vonage
- Go High Level
- n8n
- Zapier
- Salesforce
- Hubspot
- Twillio
- Vonage
- Go High Level
- 8n8
- Zapier
- Salesforce
- Avaya
- Genesys
- Five9
- Amazon Connect
- Telnyx
- Make
- Cal.com
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- Avaya
- Genesys
- Five9
- Amazon Connect
- Telnyx
- Make
- Cal.com
Pricing
Cut Costs by 90% with AI phone Agents
Pay as you go
$0 to start.
$0.07β$0.31 per minute β Pay only for what you use.
60 mins of free access.
20 concurrent calls.
10 Free Knowledge Bases.
Enterprise Plan
For companies with large volumes, data or deployment requirements, or support needs.
White glove service for your use case.
Premium support with dedicated solution engineer teams.
Custom pricing and concurrent calls based on your needs
FAQ
Frequently asked questions.
Does it sound like a real person?
Most callers do not realise they are speaking to software, and the fastest way to judge it is to hear a call rather than read a claim. The agent responds in under a second, handles interruptions, and does not talk over the caller. You choose the voice, and you can disclose that it is an AI agent at the start of the call if you prefer.
Do I build it myself, or do you build it for me?
Both are real options and this is the question prospects ask most often after the voice itself. Engineering teams build directly on the Retell API and SDK and connect their own telephony. Teams without engineers work with our implementation team and go live without writing code.
How do integrations work with my CRM?
The agent reads and writes to the systems you already run, so bookings, notes, and call outcomes land in the record rather than in a separate inbox. Retell connects to CRMs, calendars, and scheduling systems, and custom systems connect through the API. The agent can look up a caller before it answers and update the record while the call is still open.
What happens when the agent does not know the answer?
It transfers to a person and passes the full context, so the caller does not have to repeat themselves. You set the escalation rules, including which questions always go to a human and which lines they route to. The agent escalates rather than guessing when a request falls outside what it has been given.
Can I use my existing phone number?
Yes. You can port your existing number to Retell or forward it, and callers keep dialling the number they already have. Buying a new number is also available, which is the option most people notice first in the interface. You can run the agent on one line or one location before extending it to the rest.
Can I monitor calls live?
Yes. You can listen to a call while it is in progress, and take it over if you want to. Every call is transcribed, scored, and dispositioned automatically after it ends. You can review the calls the agent handled badly and retrain it from those recordings.
