AI Answering Service
Every Call Answered, 24/7
Phone Stack is an AI answering service that picks up every call within one ring, holds a real conversation, books appointments, and texts you the hot leads — for $0.25/minute, never sleeps, never misses.
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 | |
|---|---|---|---|
| Cost per minute | $0.25 | $1.50–$3.00 | $0.75 + benefits |
| 24/7 coverage | Yes | Premium pricing | Shifts |
| Setup time | 15 minutes | Days | Weeks |
| Concurrent capacity | Unlimited | 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.