Conversations That Feel Human
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Phone Answering Service USA Built for Every Time Zone
Retell answers calls for businesses across the US 24/7, handles the routine ones itself, and brings in your team when a caller needs a person.
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How it works
A Smarter Way to Answer Business Calls
01
Call arrives on your existing number
02
AI answers instantly, no hold
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Answers, books, or collects details
04
Warm transfer to a human when needed
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Summary, recording and CRM sync
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AI vs traditional answering service
Retell VS. A Traditional US Answering Service
Traditional Services
Retell
Contact SalesHours
Business hours in one time zone, or a paid add-on to cover the other three
Every call answered 24/7 across all four US time zones, including nights, weekends and holidays
What You Pay For
Per minute and per call, with hold time and monthly retainers on top
Usage-based from $0.07/min, $10 in free credits to start
Wait Time
Callers hold for the next free operator
Answered on the first ring, no queue
Busy Periods
Limited by how many operators are staffed for one time zone; callers in other zones wait or call outside its hours
20 concurrent calls included across every time zone, higher on Enterprise
Consistency
Varies with whoever picks up
The same answer quality on every call
Languages
Usually English, more languages cost extra
More than one language handled the same way
Handing Off To You
Takes a message or transfers with little context
Warm transfer with the full transcript and CRM record attached
Setup
Write scripts, brief operators, wait for training
Start from a template, sync your knowledge base, go live
Your Tools
Messages relayed by email or portal
Connects to your CRM and helpdesk and acts during the call
Compliance
Retell VS. A Traditional US Answering Service
Trust is essential when adopting an AI receptionist. Retell AI is built with enterprise-grade security, ensuring every call is protected while meeting the strictest industry standards.
SOC 2 Type II
Patient call data runs on SOC 2 Type II certified infrastructure, clearing most clinic and hospital security reviews.
HIPAA
HIPAA-ready with a self-service BAA portal, and downstream voice and model sub-processors are covered under BAAs too.
GDPR
Patient data is handled in line with GDPR, covering consent, access rights, and processing records for international patients.
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PII Redaction
Social Security numbers, card details, and patient identifiers are redacted from transcripts automatically before storage.
The Problem
Why US Businesses Are Moving to an AI Answering Service
The continental US spans four time zones, Eastern, Central, Mountain and Pacific, so a 6 PM call from a customer in New York lands at 3 PM in Los Angeles and 4 PM in Denver. A business with customers or offices spread across the country either staffs multiple shifts to cover every zone or leaves some calls unanswered outside its home hours. A traditional professional answering service can help, but it charges per call, leaves callers on hold, and bills extra after hours. Retell answers on the first ring in every time zone, on a toll-free number your whole customer base can dial or a local number tied to a specific area code, and you pay only for the minutes used.
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Cost per minute
$0.07-$0.31/min
LLM: gpt-5
$0.040/min
TTS: platform
$0.015/min
Voice Engine
$0.055/min
Background speech removal
$0.005/min
Safety Guardrails
$0.005/min
Buyer’s Guide
How to Choose a Phone Answering Service in the US
$0.07-$0.31 Per Minute
You pay for real call time, nothing else.
$10 in Free Credits
Try it before you pay anything.
No Monthly Retainers
Nothing extra for nights, weekends or busy periods.
Lower Bills Overall
Routine calls clear on their own, so spend drops.
Capabilities
What Our Agent Does on a Call
Sends Every Caller to The Right Place:
It works out why someone is calling and routes them to sales, support or billing, with no phone menu to sit through.
For businesses with offices or teams spread across time zones, routing can follow your CRM so a caller reaches the right regional office or on-call teammate instead of a general queue.
When a person is needed, the agent warm-transfers them along with the full conversation and CRM record.
Answers from Your Own Knowledge Base:
It stays in sync with your knowledge base, so callers hear current answers about hours, services and pricing.
It can look up a caller's record mid-call and tailor what it says.
It can pull from your CRM, ticketing or billing tools over secure webhooks while the call is live.
Setup
Live in Four Steps
Step 1
Build
Set the agent up in a no-code dashboard or with the API, and point it at your website and FAQs.
Step 2
Test
Run it against the calls you really get and confirm it answers well and hands off cleanly.
Step 3
Deploy
Connect your line over SIP trunking, or take a new toll-free or local number in any US area code, then go live on voice, SMS and chat.
Step 4
Monitor
Track resolution and transfer rates and caller sentiment from the dashboard, and refine over time.
Value
Why Businesses Choose Retell
A Clean Handoff to Your Team
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Reporting You Can Act On
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Built for Sensitive Data
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Put Your Business Answering Service to Work Today
Start from a template, sync your knowledge base, and connect your line or take a new number. Try it on your real calls, then go live on voice, SMS and chat.
FAQ
Common Questions
Does Retell cover businesses in every US time zone?
Yes. Retell answers calls around the clock across Eastern, Central, Mountain and Pacific time, the four time zones the continental US spans, so one phone line covers customers or offices anywhere in the country without you staffing separate shifts for each region.
Can I get a toll-free number, or does it have to be local?
Either. Retell can provision a toll-free number, using a code like 800, 888 or 833, that your whole customer base can dial for free, or a local number tied to a specific area code if you want callers to see a number that matches their region. You can also keep the number you already have and connect it over SIP trunking.
How does Retell handle calls if my team is spread across different states?
The agent works out why someone is calling and routes them using what your CRM knows about the caller, so they reach the right regional office or on-call teammate instead of a general queue. When a person is needed, Retell warm-transfers the call with the full conversation and CRM record attached, regardless of which time zone that teammate is in.
Is Retell secure enough for a nationwide business?
Retell holds SOC 2 Type II certification and supports GDPR and HIPAA requirements where they apply. Some states have their own rules on AI-voice disclosure or data privacy. This is general information, not legal advice, so confirm your specific obligations with your compliance team.
How much does a phone answering service for a nationwide business cost?
Retell is usage-based, starting from $0.07 per minute, with $10 in free credits to start and no fixed monthly retainer no matter how many states or time zones you're covering. You only pay for the minutes your agent spends on calls.
How fast can I set this up if my business has locations in multiple states?
You start from a template in a no-code dashboard or with the API, point it at your website and knowledge base, and test it against your real call patterns before going live. Most businesses go live on voice, SMS and chat within days, with the same setup whether you run one office or several.
Does the agent sound different depending on where the call is coming from?
No. It answers with the same voice, script and knowledge base on every call, whether it's a 9 AM call from the East Coast or a 6 AM call from the West Coast. That consistency is one of the advantages over a traditional answering service, where answer quality can vary by whichever operator picks up.
