TL;DR: The best AI voice agent for plumbing and HVAC depends on your call volume, emergency process, and billing unit. Avoca AI fits larger operations. Sameday AI starts at $449 per month. Goodcall bills by unique caller. Rosie starts at $49. Signpost / Mia adds live humans. Chatley AI starts at $129 per month. Run a 10-minute test call and price each plan against your own minutes before you sign.
You are under a sink when the phone rings. Answering interrupts the customer in front of you. Letting it ring risks the next booking. The gap is real. A 2024 study by 411 Locals, covering 85 businesses across 58 industries, found that only 37.8% of incoming calls were answered by a live person. Invoca data puts home service missed calls at about 27%. An AI voice agent closes that gap, as long as it does not create more dispatch work.
Prices below were checked in October 2026. Vendors change plans often, so confirm on the vendor’s site before you buy.
AI Voice Agents for Plumbing and HVAC at a Glance
Chatley AI | Connected voice, chat, and SMS | Pro $129/month (150 minutes); Elevate $229; Premium $399 | Pro is inbound-only, included-minute allowance |
Avoca AI | Larger service operations | Quote-based; third-party estimates run about $1,000 to $3,000/month | Enterprise sales process |
Sameday AI | Sales-led booking | Launch $449/month for 500 minutes; Scale $789/month for 1,000 minutes | Included minutes set your capacity |
Goodcall | Repeat callers | Starter $79/month per agent, 100 unique callers, $0.50 per extra caller | General-purpose setup |
Rosie | Small shops | Professional $49/month for 250 minutes | Entry plan takes messages only |
Signpost / Mia | Human-assisted answering | Standard $199/month for 500 AI minutes, plus $199 setup | Setup cost, live minutes cost more |
What does an AI voice agent do for a plumbing or HVAC shop?
It answers the phone, asks the right questions, books routine jobs, and escalates urgent calls to a person. A good one captures the problem, the address, and a callback number every time. It also tells the caller what happens next.
It does not repair a burst pipe. Your on-call technician still does that.
Chatley AI: Connected Voice, Chat and SMS
Chatley AI is an AI voice receptionist and white-label agent platform. It has agents for voice, website chat, and SMS, with shared conversation history across channels. A customer who calls, then texts, then fills out your web chat does not start over each time.
The receptionist answers questions from a knowledge base you build, books appointments, and texts the caller a confirmation. It books, moves, and cancels appointments in Google Calendar, Cal.com, and Calendly.
Emergency handling is configurable. You define what counts as urgent. Urgent calls route to your on-call contact with the details logged. Managers can monitor live calls, whisper guidance, or take over.
Setup is flexible too:
Run it after hours only, for overflow, or for every call, and change that at any time.
Forward your existing business number or get a new one.
Resell it under your own brand through the white-label platform.
Connect your own tools through the MCP server.
Price and trade-offs. Pro costs $129 per month and includes 150 minutes, 1 phone number, and 1 knowledge base. The entry plan is inbound-only, so check whether your shop needs outbound calling. Compare the 150 included minutes against your real talk time. Check Chatley AI pricing page.
Avoca AI: Larger Service Operations
Avoca AI is a voice agent built for home services. It answers inbound calls, qualifies callers, checks availability, and books them into your scheduling software. A third-party guide says it can price after-hours and holiday fees differently from standard visits, and that Avoca reports more than 1,000 service businesses as customers. FieldCamp’s review reports a raise of more than $125 million at a reported $1 billion valuation in 2026.
Pricing is not published. The same review estimates roughly $1,000 to $3,000 per month. Treat that as an estimate, not a quote.
Best for: contractors with real call volume and an existing dispatch stack.
Trade-off: the buying process can be heavier than a small shop needs.
Sameday AI: Sales-Led Booking
Sameday AI is built for home services and puts weight on turning inquiries into booked jobs. Its plans are flat monthly: Launch at $449 for 500 minutes and Scale at $789 for 1,000 minutes with voice cloning. Launch includes 3 locations. Scale has unlimited locations. Both list scheduling for platforms such as ServiceTitan. PricingSaaS tracks the same three tiers, with Enterprise by quote.
Best for: teams that want a more consultative booking conversation.
Trade-off: your included minutes decide capacity, so estimate talk time first.
Goodcall: Billing by Unique Caller
Goodcall is a general-purpose phone agent used across trades. It bills by unique callers, not minutes. Per Macha’s guide, Starter is $79 per agent per month for 100 unique customers, Growth is $129 for 250, and Scale is $249 for 500. Each extra caller costs $0.50, and minutes are unlimited. CloudTalk notes that a unique caller means a unique phone number.
Best for: shops with a steady base of repeat callers and long conversations.
Trade-off: it is not trade-specific, so expect to configure what it collects.
Rosie: A Low-Cost Starting Point
Rosie is an AI answering service for small businesses. CloudTalk lists three public plans: Professional at $49 for 250 minutes, Scale at $149 for 1,000 minutes, and Growth at $299 for 2,000 minutes. Dialzara’s comparison says the Professional plan is essentially message-taking, while live transfers and calendar links such as Google Calendar and Calendly start on Scale.
Best for: solo operators replacing voicemail.
Trade-off: lean features at the entry price and metered minutes.
Signpost / Mia: AI Answering With Human Backup
Signpost / Mia is a trades-focused hybrid of AI reception and live receptionists. Per Signpost’s published pricing, Standard is $199 per month for 500 AI minutes plus a $199 setup fee. Advanced adds 100 live minutes and Complete adds 250. Extra AI minutes cost $0.40 each.
Best for: contractors who want a human on selected calls.
Trade-off: setup cost, plus live minutes budgeted separately.
How We Picked These AI Voice Agents
We looked at answering, booking, urgent-call handling, billing clarity, and fit for a contractor’s operating model. Prices come from vendor pricing pages and third-party trackers. Where a vendor does not publish a price, we say so.
How do you compare costs on your own call data?
Take a shop with 120 unique callers and 450 talk minutes a month. This is an illustration, and plans differ in features:
Goodcall Starter: 100 callers are included; 20 extra at $0.50 is $10, so $89.
Rosie Scale: 1,000 minutes covers it, so $149. The 250-minute Professional plan would not.
Signpost / Mia Standard: 500 AI minutes cover it, so $199 plus a one-time $199 setup.
Sameday AI Launch: 500 minutes covers it, so $449.
Chatley AI Pro: includes 150 minutes, so 450 minutes needs a larger allowance.
Avoca AI: quote-based.
Run the same math with your own numbers. Short calls and long calls stress minute plans differently. Repeat callers matter under per-caller billing. For a fuller framework, see choosing an AI phone assistant for home services.
How should you test an AI voice agent before you buy?
Run three calls:
A routine booking. Does it collect job details and confirm a time?
An urgent call. Does it capture the address and a callback number, and tell the caller what happens next?
A caller who needs language help. Does the caller leave understanding the next step?
Judge the whole handoff, not the greeting. A calendar booking is not a field-service workflow, so check how appointment details reach the people doing the work.
Which AI voice agent should you choose?
The right pick depends on your call volume, your emergency process, and how you want to pay.
Larger operation with a dispatch stack: Avoca AI, if you can work with a quote-based sales process.
Sales-led booking conversations: Sameday AI, from $449 per month for 500 minutes.
Many repeat callers: Goodcall, which bills by unique caller with unlimited minutes.
Solo operator replacing voicemail: Rosie, from $49 per month, with live transfers starting on Scale.
Live humans on selected calls: Signpost / Mia, from $199 per month plus a $199 setup fee.
One setup for calls, web chat and SMS: Chatley AI, from $129 per month, with Elevate at $229 and Premium at $399 as your volume grows.
Chatley AI is an AI voice receptionist and white-label agent platform. It has plans from $129 to $399 per month, and Capterra lists HVAC, plumbing and electrical contractors among its target users. Agencies can also resell it under their own brand.
Whichever you shortlist, run the same three test calls: a routine booking, an urgent call, and a caller who needs language help. Price each plan against your own minutes and unique callers. Then pick the one that gets the next booking and hands the emergency to your on-call technician without extra dispatch work.
Try Chatley AI with your own scenarios: a routine booking, an urgent call and an after-hours message. Start with Chatley AI.