Automated Calling System That Makes and Answers Every Call in Seconds

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Retell AI is an automated calling system that places and answers phone calls with voice agents that hold a natural conversation instead of playing a recording. It runs outbound campaigns to thousands of contacts, answers inbound calls 24/7, books and updates records mid-call, and routes anything that needs a person to your team with full context. It runs on your existing phone numbers through SIP trunking, in 55 languages, and needs no new hardware or engineering team.
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Trusted by over 3,000 businesses powering 30+ million calls per month.
How It Works

Launch your automated calling system in four steps, from connecting your phone line to running live calls.

Build your agent
Pick a voice, write your call flow and escalation rules, and connect a knowledge base that syncs from your data, policies, and site.
Connect your phone system
Point your existing numbers at the agent through SIP trunking and keep your current carrier, or grab a new number from the platform.
Test with simulated calls
Run simulated inbound and outbound calls to check booking accuracy, data lookups, and routing before you go live, without spending call minutes.
Launch and monitor
Go live on a slice of traffic or a first campaign, then track resolution rate, connect rate, transfers, and handle time in the dashboard.
Use Cases

Calls your automated calling system handles end to end

Run outbound campaigns without manual dialing

Manual dialing caps how many contacts your team reaches in a day. Batch Call places personalized calls to your entire list at once, drops each contact's details into the script, and tracks the outcome of every dial. Reminders, follow-ups, and outreach go out on schedule while your team works the conversations that need them.

Answer inbound calls around the clock

Calls outside business hours hit voicemail, and callers who reach voicemail rarely call back. Running 24/7, the system answers every inbound call on the first ring, resolves routine requests overnight and on weekends, and captures the rest instead of losing them. Your team arrives to resolved calls, not a backlog.

Send reminders, confirmations, and notifications

No-shows and missed updates cost money. The system calls contacts to confirm appointments, send payment reminders, and share time-sensitive updates, and it reschedules or answers a question on the same call. It logs every call, so you know who it reached and what they said.

Qualify and follow up with leads

Speed to lead decides who wins the deal. The system calls new leads the moment they come in, asks your qualifying questions, and books the warm ones straight onto a calendar. Sales talks to prospects who are ready, not a list of cold numbers.

Answer questions and route with full context

When a call needs a person, a cold handoff makes the caller repeat everything. The agent reads intent from natural speech, answers routine questions from your knowledge base, and sends the rest to the right team with the full transcript on a warm transfer. It escalates only the calls that truly need a human.

Serve multilingual contacts and absorb volume spikes

Peak periods and international callers strain a fixed team. The system serves contacts in 55 languages with automatic language detection, and concurrency scales on demand, so you add capacity in minutes with a slider instead of staffing for the peak. Service holds steady through check-in rushes and seasonal surges.

Compliance

Automated calls touch personal and payment data on nearly every line.

SOC 2 Type II

Retell runs call data on SOC 2 Type II certified infrastructure, meeting enterprise security requirements.

HIPAA

Regulated teams deploy under HIPAA and pull a self-service BAA from the dashboard.

GDPR

Retell processes caller data under GDPR, covering consent and access rights for callers in the EU.

PII Redaction

The platform strips personal identifiers from transcripts automatically, keeping every records audit clean.

Feature

Why teams choose Retell AI for automated calling

Build
Deploy
Monitor
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Holds a conversation instead of playing a recording
Legacy automated calling systems blast a pre-recorded message and hang up. Retell's voice agents listen, read intent from natural speech, answer follow-up questions, and finish the task on the call. Contacts respond to a two-way conversation the way they would with a person, so more calls reach a useful outcome instead of a dial tone. Results vary by call type and setup.
Answers questions from your own knowledge base
Callers ask the same things all day: your hours, whether an order shipped, when an appointment starts, what they owe. A connected knowledge base pulls those answers from your own data, policies, and site, so the agent responds correctly without a rigid script. Update a detail once and the next call reflects it, with no retraining.
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Runs outbound campaigns to thousands at once
Batch Call places personalized calls to your whole list from the dashboard or the API, and drops each contact's name, account, or appointment time into the script. Reminders, follow-ups, lead qualification, and collections go out on schedule without manual dialing, and campaigns scale on demand without concurrency limits.
Sits on the phone system you already run
SIP trunking connects to any carrier and keeps your current numbers, so you skip the rip-and-replace project. Branded caller ID and verified numbers keep your calls out of the spam label, so more people pick up, and the agent reads and writes records in your CRM or calendar during the call.
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Redacts personal data from every transcript
Every call can carry a name, a number, or a payment detail, and a stray identifier in a log turns into a compliance problem fast. PII redaction strips personal identifiers from call records automatically, on the retention settings you control. Your team reviews calls and tracks outcomes without ever exposing caller data in the logs.
Shows which calls got resolved
Teams usually review a small manual sample and guess at the rest. Every call generates a transcript, a sentiment score, and a resolution outcome, and post-call analysis scores calls for resolution rate, transfer rate, and handle time against your baseline. You see what is working instead of guessing. Results vary.
Integrations

Seamless
Integrations with Your
Tech Stack

View All Integrations
  • 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
  • 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.

$0.07–$0.31 per minute – Pay only for what you use.
60 mins of free access.
20 concurrent calls.
10 Free Knowledge Bases.
Get Started
FAQ

Frequently asked questions.

What is an automated calling system and what can it do?

An automated calling system is software that places and answers phone calls on its own, instead of routing them to a queue or blasting a recording. On a conversational AI platform, it dials or picks up, looks up customer and account data, books and changes appointments, answers common questions, and routes the rest, 24/7 in 55 languages. It handles the predictable call volume so your team focuses on the callers who need a person.

Does it work with our existing phone system and CRM?

Yes. SIP trunking connects to any carrier and keeps your current numbers, and the agent reads and writes records in your CRM or booking engine during the call. You add no new hardware and run no rip-and-replace, so you can route a slice of traffic first and scale once the metrics hold.

Can it make outbound calls and answer inbound calls?

Yes. Batch Call places personalized outbound calls to your whole list from the dashboard or the API, and the same agent answers inbound calls on your existing numbers. You define what it does on each, so outbound campaigns and inbound support run from one system.

What happens when a call needs a person?

The system runs a warm transfer to the right person and passes the full transcript along, so your staff picks up mid-conversation instead of starting over. You define the escalation rules, so sensitive or high-value calls route to a person by design, and the dashboard logs every transfer for review.

How much does Retell AI cost for an automated calling system?

Pricing runs pay-as-you-go and starts at $0.07 per minute for the voice engine, with no platform fees and $10 in free credit to start. Outbound batch dialing starts at $0.005 per dial, and every account includes 20 concurrent calls at no charge. Once you add an LLM and telephony, a typical all-in rate lands closer to $0.09 to $0.19 per minute, depending on your model and voice choices.

Will people know they are talking to an AI, and what if they want a person?

The voice sounds natural and responds in under a second, so callers talk to it the way they would a front-desk agent. Many teams disclose the AI upfront, and completion and satisfaction hold steady either way. Anyone who wants a person can ask, and the call transfers to your team, which already has the context.

Revolutionize your call operation with Retell

Start building smarter conversations today.

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