AI Answering Service
Every Call Answered, 24/7
Phone Stack is an AI answering service: an AI voice agent answers your business line 24/7, holds a real conversation, books appointments on your calendar, takes messages, and routes urgent calls to you. Never miss a call. Replace voicemail, not your receptionist. Flat monthly plans start at $69 with talk time included, roughly a tenth of a human virtual receptionist, and setup is zero code in about 15 minutes. Start free. 14 days, no card.
What is an AI answering service?
An AI answering service is a 24/7 phone-answering service that uses an AI voice agent in place of a human receptionist. Calls are answered instantly, the AI holds a real conversation with the caller, books appointments, takes messages, and routes urgent matters to you. Phone Stack is the AI answering service version of legacy virtual receptionist providers: same job, ~10% of the cost, 24/7/365 with no premium.
AI Answering Service vs Virtual Receptionist vs In-House
| Phone Stack AI | Virtual Receptionist | In-House | |
|---|---|---|---|
| Monthly cost | From $69 flat, minutes included | $1.50 to $3.00 per minute, often $500+ | $3,000+ salary and benefits |
| 24/7 coverage | Yes | Premium pricing | Shifts |
| Setup time | 15 minutes | Days | Weeks |
| Concurrent capacity | Scales with your plan | Limited | 1 per receptionist |
| Calendar booking | Yes | Add-on | Manual |
| CRM logging | Yes | Add-on | Manual |
What the AI answering service does on a call
- Answers within one ring, 24/7/365
- Greets callers in your brand voice
- Answers FAQs from your knowledge base
- Books appointments live on Google or Outlook calendar
- Takes messages and emails them to you
- Texts you immediately for hot leads or emergencies
- Transfers live to your mobile when needed
- Logs every call to your CRM with a transcript
Part of the Phone Stack AI call center
The AI answering service is one mode of the broader Phone Stack AI call center. Every account also gets outbound campaigns, voicemail drops, and a complete AI caller platform.