Automated Phone System That Answers Every Call in Under a Second
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Go from a phone tree to a live AI agent in four steps, on your existing numbers.
Greet every caller instantly, identify intent from natural speech, connect them to the right person or department, and resolve routine questions about hours, location, and services on the call. When a call needs a person, a call transfer carries the full conversation so staff pick up already knowing the context.
Check live calendar availability and lock in a slot while the caller is still on the line, then send confirmations and handle reschedules without a callback or a staff member.
Automated reminder calls go out ahead of each appointment, so fewer slots sit empty and staff stop chasing confirmations by hand.
Place reminder, notification, and follow-up calls to a full contact list with batch call campaigns, reaching thousands of contacts with no concurrency limits and per-call outcome tracking.
On outbound campaigns the agent qualifies leads, updates the CRM, and routes warm prospects to a rep automatically, so your team works a clean, ranked queue instead of dialing cold.
Answer every call at nights, weekends, and holidays with no voicemail dead end. An AI answering service captures caller details and books or escalates when your team is offline, and absorbs call spikes so peak volume never turns into missed business.
Why teams choose Retell AI over a phone tree
- Hubspot
- Twillio
- Vonage
- Go High Level
- 8n8
- 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
Cut Costs by 90% with AI phone Agents
Pay as you go
$0 to start.
Enterprise Plan
For companies with large volumes, data or deployment requirements, or support needs.
Frequently asked questions.
What is an automated phone system?
An automated phone system answers and manages business calls without a person picking up each one. Older versions, often called an auto-attendant or IVR, play a recorded menu and route callers by keypad press. A modern AI voice agent answers in natural language, holds a back-and-forth conversation, resolves common requests, and transfers to a person only when needed. It works as a virtual receptionist line for inbound calls and as an outbound caller for reminders and follow-ups, getting every caller handled without the menu friction.
What's the difference between an automated phone system and an IVR?
An IVR is the touch-tone kind of automated phone system. It plays a fixed menu, “press 1 for billing,” and routes calls down a pre-built tree; it cannot answer a question or handle anything outside the menu. A modern automated phone system replaces that tree with natural conversation: the caller speaks normally, the agent understands intent, and it resolves the request instead of just forwarding it. An IVR sends the call somewhere. A conversational system handles the call itself.
Do I need to change my phone number or carrier to use it?
No. The system connects to your existing numbers and carrier through SIP trunking, so callers reach you the same way they always have. The AI layer sits on top of that line and upgrades how calls are answered without changing your underlying setup.
Can it make outbound calls or only answer them?
Both. Beyond answering inbound calls, the agent runs outbound reminder, follow-up, and notification campaigns at scale. Outbound calls go out with a branded call ID to lift answer rates and reduce spam labeling, and each call's outcome is tracked for follow-up.
What happens when it can't answer a caller?
It escalates instead of dead-ending the caller. When a request falls outside what the agent can resolve, or the caller asks for a person, it performs a warm transfer to staff and passes the full conversation along, so the caller never repeats themselves. If no one is available, it captures the details and books a callback or takes a message. You set these escalation rules during setup.
How much does an automated phone system cost?
Cost depends on the model. Legacy hardware carries upfront equipment and per-seat licensing, and cloud or VoIP systems usually charge a monthly per-user subscription. Retell AI runs pay-as-you-go at $0.07 per minute with $10 in free credit, 20 free concurrent calls, and no platform fee, so you pay for usage rather than seats. The number to compare is cost per call handled against the staff time those calls used to consume.
