Short answer: if you want an AI receptionist built specifically around HVAC triage (system type, no-heat versus no-cool, when to escalate), Dial 72 and Avoca are the two built closest to the trade. If you want a general-purpose AI phone agent that happens to work for HVAC, CloudTalk, Goodcall, Smith.ai, Dialzara, and Rosie all cover the basics at different price points and levels of hand-holding.
Here’s the honest breakdown of all seven, including where each one is a genuinely good fit and where it isn’t.
What actually matters for an HVAC shop
Before the list, the criteria. An AI receptionist for HVAC needs to do more than pick up the phone:
- Answer 24/7, because 62% of HVAC calls come after 5 p.m., on weekends, or on holidays.
- Triage by urgency, not by who called first. A no-cool call with an elderly person in the house is not the same as a running-but-weak system that can wait until tomorrow.
- Capture the details dispatch needs: system type, symptoms, address, and a callback number, so nobody’s chasing a caller back for information that should’ve been collected on the first call.
- Book directly into the calendar, not just take a message that still needs a callback.
- Know when to get out of the way and hand the caller to a real person.
Everything below gets measured against that list.
1. Dial 72
Dial 72’s receptionist, Bella, is built specifically for HVAC: the intake questions are about system type and symptoms, not a generic “how can I help you” script. She answers in under a second, day or night, triages true emergencies like no heat, no AC, or a gas smell straight to your on-call tech, books the appointment on the spot, and texts a summary before she hangs up. Flat monthly pricing at $95, $295, or $495 depending on how much of the system you need, no per-minute charges, no contract.
Where she falls short, honestly: she’s a front desk, not a technician. She won’t diagnose a system over the phone or quote a repair price, and if a caller flatly wants a human, she transfers them with the details already collected.
2. Avoca
Avoca is built as a full AI front office for home-service companies running a real call center: HVAC, plumbing, and electrical shops fielding hundreds of calls a day. It books jobs and triages emergencies rather than just taking messages, and its integration depth with ServiceTitan is a real strength for shops already living inside that platform.
Where it falls short: the pricing and setup are built for enterprise-scale operations. A two-to-twenty-tech shop is likely to find it more platform than they need, and more than they’ll spend.
3. CloudTalk
CloudTalk is a full VoIP phone platform with AI reception layered on top, which means you get call analytics most single-purpose AI receptionists don’t: which call types actually convert to booked jobs, where callers drop off during qualification. For a shop that wants phone system and AI answering in one contract, that’s a real advantage.
Where it falls short: you’re buying a VoIP platform, not just an HVAC-trained receptionist. If your phone system already works fine and you only need the answering piece, it’s more than the job calls for.
4. Goodcall
Goodcall’s drag-and-drop workflow builder lets an owner set up call logic without needing an engineer: route emergencies one way, maintenance-plan questions another. It’s a flexible, general-purpose AI phone agent that can be configured for HVAC intake.
Where it falls short: it doesn’t natively integrate with ServiceTitan, Jobber, or Housecall Pro, so appointment details often mean a manual transfer into whatever you’re already using to dispatch.
5. Smith.ai
Smith.ai pairs AI answering with live human backup, which is the right call for a shop that wants a person in the loop for anything complicated or high-value. It’s a hybrid model, not a pure AI receptionist.
Where it falls short: the human-backup layer is also what makes it cost more than a pure-AI option, and for a shop mainly trying to stop losing after-hours calls to voicemail, that hybrid layer may be more than’s needed.
6. Dialzara
Dialzara publishes an HVAC-specific plan with dispatch and booking built in, and connects to ServiceTitan, Housecall Pro, and Jobber. It’s aimed at smaller shops that want HVAC-specific answering without an enterprise price tag.
Where it falls short: it’s a newer, narrower product than the platform-style options on this list, so the depth of triage logic and edge-case handling is worth testing directly against your own call patterns before committing.
7. Rosie
Rosie is built as a simple, affordable 24/7 front desk for home-service businesses in general, HVAC included. If the goal is just “stop calls from going to voicemail” at the lowest possible cost, it does that job.
Where it falls short: “simple” also means less HVAC-specific triage logic than options built around the trade. A no-heat call and a filter question are less likely to be handled differently out of the box.
How to actually choose
Ignore the marketing and ask each vendor the same three questions: What does it do the moment a caller says “no heat”? What system does it actually book into? And what happens to a call it can’t handle? The honest answers to those three questions will tell you more than any feature list, including this one.
85% of callers who reach voicemail never call back. Whichever option you pick, picking one beats not picking one. See how Dial 72’s triage works, or compare pricing before the next after-hours call decides for you.
