For plumbing, HVAC, roofing and electrical companies

When you can't pick up, the job still gets booked.

Every missed call gets a text back within seconds. It finds out what the customer needs, spots emergencies, books a time and texts you a one-line summary. You keep your phone number.

Try it as a customerSee pricing

The demo takes about 30 seconds. No sign-up.

Example conversation (illustration, not a real customer)

Mike's PlumbingText message
Missed call ยท 6:42 PM
Hi, this is Mike's Plumbing. Sorry we missed you, we're out on a job. What's going on?
water heater is leaking all over the garage floor
Sorry to hear that. If you can, turn the cold supply valve on top of the heater to off. What's your ZIP code?
37919
Thanks. A tech can be there tomorrow 8-10am, or I can have Mike call you in the next 15 minutes if it's getting worse. Which would you like?
8-10 tomorrow is fine. Dana
Booked, Dana: tomorrow 8-10am. You'll get a reminder text tonight.
Text to the owner

New booking: Dana, 37919. Water heater leaking in garage. Booked tomorrow 8-10am. Told her to shut off cold supply.

Missed calls are missed jobs

You can't answer the phone from under a sink, on a roof or in a crawlspace. Most callers won't wait for you to call back.

HVAC companies answer about 34% of calls. Plumbing companies answer 74%. Across home services the average is 52%.
Invoca Home Services Lead Conversion Benchmarks Report, 2026
82% of consumers say they'd call a competitor if a business doesn't answer. Only 42% say they leave a voicemail.
CallRail survey of 1,000 US consumers, September 2025

How it works

We set it up for you. Nothing to install and no new app for your team.

Step 1Calls you miss forward to usYour number stays the same. We set your phone to forward unanswered calls to a line we set up for you. Calls you pick up work exactly as they do today.
Step 2The caller gets a text in secondsIt asks what's wrong, where they are and how urgent it is. It answers from your own information: services, area, hours, call-out fee. It never makes up prices.
Step 3You get a booked job and a summaryIt offers your open times and books one. Emergencies come straight to your phone. You see every conversation and can step in whenever you like.

Pricing

A one-off setup fee, then you pay the phone and AI providers directly at cost. No contract.

Starter

$500
  • Missed-call text-back in your words
  • Captures name, job and address
  • Instant alert to you by text and email

Booking AgentRecommended

$1,500
  • Everything in Starter
  • Two-way conversation that sorts out the job
  • Flags emergencies and books into your calendar
  • 30 days of tuning after go-live

Full Front Desk

$3,000
  • Everything in Booking Agent
  • Connects to Jobber, Housecall Pro or ServiceTitan where their API allows
  • After-hours website chat
  • Review requests after each job
How to start: pay a $500 deposit to reserve a build slot. It counts in full toward whichever plan you choose. Most builds go live within 5 to 10 working days.

Reserve a build: $500 depositEmail a question first

Running costs (phone number, text messages, AI usage) are billed by the providers in your name. For a small shop that's usually $20 to $60 a month.

Who you'll be dealing with

CallBack AI is built by Chris Elder, founder of GPT Shop Ltd. Chris was an operations leader at Amazon and an officer in the British Army. He builds and supports each setup himself, so you deal with one person who answers his email.

GPT Shop Ltd is a UK limited company (no. 15766335). We work with US businesses remotely. Setup is done over a short call and email.

Contact: chris@gptshopltd.com

What we won't do

We won't lock you into a contract, take over your phone number or send marketing texts to your customers. It only replies to people who just called you. Every message includes STOP opt-out, and we register your texting with US carriers (A2P 10DLC) with you.

Questions

Do I need a new phone number?

No. You keep your number. Only calls you don't answer get forwarded to the line that sends the text.

What if the AI says something wrong?

It only works from what you give it: services, area, hours and call-out fee. It doesn't quote job prices. Anything outside those rules gets handed to you. Every conversation is logged, and we review them with you for the first 30 days.

Is it legal to text people who called me?

Replying to someone who just called your business is a conversational message, not marketing. We still include STOP opt-out and quiet hours, and we handle the carrier registration. We aren't lawyers, so if you have a specific concern, check with yours.

What does it work with?

Every plan works with Google and Outlook calendars. Full Front Desk adds Jobber, Housecall Pro, ServiceTitan and similar tools, where their API allows it.

What if I want to stop?

There's no contract. You own the setup, and you can switch off call forwarding from your phone any time.

Can I try it first?

Yes. Try the live demo as if you were a customer. It's the same AI agent we'd set up for you, using a made-up plumbing company.