Disclosure: Futuro sells an AI receptionist configured for HVAC, one of the nine products evaluated below, so we have a commercial interest in this page’s conclusion. We never accept paid placement; see our Publishing Principles. Every price was verified against the linked vendor page on August 27, 2026, and the list includes options we don’t sell.
HVAC is the emergency trade. Nearly nine in ten U.S. households use air conditioning, per the Energy Information Administration, and heat is already the leading weather-related cause of death in the country, per the Environmental Protection Agency. When a heat dome parks over your metro or a hard freeze rolls through, every phone in your market rings the same day, and the company that answers live gets the job. This guide compares nine AI receptionists on the axes that actually decide an HVAC season: emergency triage, integration with the field-service software your office runs, concurrency during a surge, and what the pricing model does during your busiest week.
This is the first edition of this guide. Research and verification ran through August 2026, with every price re-verified against the linked vendor page on August 27, 2026, and a full re-verification scheduled quarterly. The nine platforms are listed alphabetically and are not ranked by total score, because a one-truck owner-operator and a forty-truck residential platform have different right answers; the entries below show where each one landed and who it is genuinely best for.
About this guide: Platforms are listed alphabetically (Avoca, Dialzara, Futuro, My AI Front Desk, OnCrew, Retell AI, Rosie, Sameday, Smith.ai), not ranked. Each entry includes what the platform genuinely does best, one honest trade-off, and pricing where publicly available. This guide is published by Futuro Corporation, and yes, Futuro is one of the nine. We will tell you plainly where it is the right choice and where it is not. External sources cited throughout.
How did we evaluate each platform?
Every platform was scored against the same six-criterion rubric, weighted by what decides an HVAC company’s summer and winter peaks. Scores reflect public information, vendor documentation, and live pricing pages as of August 27, 2026.
| Criterion | Weight | What we looked for |
|---|---|---|
| Emergency triage intelligence | 25% | Safety-first questioning, emergency-versus-routine classification, on-call alerting speed, and escalation to a human when the call warrants it |
| FSM integration, verified | 20% | Documented booking into ServiceTitan, Housecall Pro, Jobber, or FieldEdge, checked against marketplace listings, help centers, and pricing pages rather than marketing claims |
| Voice quality & multilingual | 15% | Naturalness, latency, interruption handling, HVAC vocabulary, and language coverage for Spanish-speaking homeowners |
| Surge concurrency | 15% | Simultaneous-call handling at heat-wave volume, stated in numbers, and whether a queue or busy signal ever forms |
| ETA & status-call memory | 15% | Whether the receptionist can answer “when is my technician arriving?” from the appointment record instead of taking another message |
| Pricing behavior at HVAC volumes | 10% | What the billing model does in your hottest week: flat rate, minute caps with overage, per-call metering, or quote-only |
Where a platform could not be verified against a criterion, we say so plainly in its entry. Platforms are not ranked by total score: a one-truck operator and a multi-location brand have different winners. Entries below are listed alphabetically, A to Z, and each opens with who it is genuinely best for, including when that is not us.
Why are HVAC phones different from every other trade?
Every trade has a phone problem. HVAC has three specific properties that make its phone problem the most unforgiving in home services, and each one maps directly to a rubric criterion above.
The caller is often in an unsafe house
A no-cool call during a heat advisory is uncomfortable for a healthy adult and dangerous for an infant, an elderly parent, or a family member with a respiratory condition. A no-heat call during a hard freeze risks frozen pipes and, when a furnace is venting improperly, carbon monoxide. The EPA states plainly that heat is already the leading weather-related cause of death in the United States, and the CDC counts more than 700 U.S. deaths from extreme heat each year, naming older adults, young children, and people with chronic conditions as the highest-risk groups; its HeatRisk guidance exists because the danger is local, immediate, and forecastable. Winter flips the failure mode rather than removing it: heating equipment is a leading cause of U.S. home fires, per the NFPA’s heating-safety research, which is why a no-heat call where the homeowner mentions space heaters is an emergency, not an estimate. An answering solution for this trade is therefore not a message pad: it is the first five questions of a triage protocol, and the difference between “someone will call you back Monday” and “is anyone in the home elderly or under two, and is the CO alarm sounding” is the difference between a receptionist and a liability.
Everyone’s phones ring on the same day
Cooling is not a niche service. Per the EIA’s 2020 Residential Energy Consumption Survey, 88% of U.S. households use air conditioning. Demand is weather-synced across the entire market: the first 95-degree week does not bring you ten extra calls spread across a month; it brings every homeowner whose compressor chose that week to fail, calling every contractor in the metro on the same afternoon. The surge is not random, either: the same National Weather Service heat advisories your customers are reading are a two-day forecast of your call volume. Any answering solution with a human ceiling, a minute cap, or a concurrent-call limit breaks on exactly the days your annual revenue is decided.
You cannot hire your way out of it
The labor market will not save the front office. The Bureau of Labor Statistics pegs HVACR mechanics and installers at a $59,810 median wage (May 2024) with roughly 40,100 openings a year and 8% projected growth through 2034, well above average, which means your best hire goes to the truck, not the desk. Staffing the phones for a heat wave means paying for surge capacity fifty idle weeks a year or paying overtime and burning out the office manager you have. And the techs you do have are working through the same heat that is ringing your phones; OSHA’s heat-exposure guidance exists for exactly their working conditions. The math pushes toward an answering layer that scales with weather rather than headcount.
What five calls expose a weak HVAC AI receptionist?
Marketing pages all claim the same things, so we wrote a test instead: five calls that any HVAC owner can place to any vendor’s demo line, ours included, in under an hour. We publish the protocol here under a CC-BY license so you can run it yourself, and we are transparent about the current state of our own testing: Futuro’s behavior on these five calls comes from operating the product first-hand, every day, on real HVAC deployments. Recorded competitor runs are scheduled for our quarterly re-verification cycle, and we will publish transcripts with scores when they exist. We are not going to claim a test we have not run; the methodology section says exactly what we did and did not do.
Call one: the 2 AM no-heat emergency
The script: it is 2 AM, 18 degrees outside, the furnace is dead, and there is a six-month-old in the house. A passing receptionist asks safety questions first (CO alarm status, vulnerable occupants, gas smell), captures the equipment type and age, classifies the call as an emergency, and alerts the on-call phone immediately with the full context, or warm-transfers. A failing receptionist cheerfully books a Thursday estimate slot or takes a name and number.
Call two: the 95-degree ETA call
The script: an existing customer with a 1 to 4 PM window calls at 2:40 asking where the technician is. A passing receptionist recognizes the caller, pulls the appointment, and answers the status question, or at minimum confirms the window and sets a callback expectation. This is the ETA-memory criterion, and it is where pure message-takers fall over: they add a callback ticket to your morning instead of resolving the call.
Call three: the maintenance-agreement renewal
The script: a plan holder calls to renew and book the fall tune-up. A passing receptionist identifies the customer, confirms the plan details on file, offers available windows, books one, and sends a confirmation text. This call is the quiet workhorse of an HVAC phone line: low drama, high volume, pure structure, and exactly the kind of call that should never reach a human desk in 2026.
Call four: “Do you service my brand?”
The script: a homeowner with a ten-year-old mini-split of a specific brand asks whether you service it, what a diagnostic visit costs, and whether you can come this week. A passing receptionist answers from your configured equipment and pricing knowledge, captures the brand and model for the tech, and books the diagnostic. These calls now carry efficiency-standard vocabulary straight from federal rules: replacement shoppers ask about SEER2-era equipment classes and whether a heat pump qualifies for the incentives ENERGY STAR documents, so the receptionist’s knowledge base has to speak that language or hand off cleanly. A failing one improvises a price or promises a callback for a question your website already answers.
Call five: the Spanish-language no-cool call
The script: the entire call happens in Spanish, including the address and the gate code. A passing receptionist detects the language, conducts the full intake in Spanish without degrading, and delivers your office a structured summary it can act on. In large parts of Texas, Florida, Arizona, and California this is not an edge case; it is Tuesday.
Which platform fits at a glance?
The full conclusion, scannable in one pass; the graded details sit in each entry below. Prices verified on the linked vendor pages August 27, 2026.
| Platform | Best for | FSM booking | Pricing |
|---|---|---|---|
| Avoca | Enterprise residential shops on ServiceTitan | Native ServiceTitan and Housecall Pro booking | Quote-only; third-party estimates $1,000 to $3,000/mo |
| Dialzara | Live today on almost no budget | Calendar sync from Pro up; Zapier and Make middleware | From $29/mo (60 min, $0.48/min overage) |
| Futuro (our product) | Emergency triage, ETA memory, flat-rate surge answering | Booking handoff configured to your FSM or calendar at onboarding | Flat monthly from $200/mo |
| My AI Front Desk | A zero-risk pilot on real calls | Zapier middleware | $99/mo, or $79/mo annual (200 voice min) |
| OnCrew | Trade-tuned triage with fast on-call alerts | Google Calendar plus Zapier handoff | From $49/mo (100 calls, $0.99/call overage) |
| Retell AI | Developer teams owning the voice stack | Custom build on its API | $0.07 to $0.31/min pay-as-you-go |
| Rosie | Home-services-native intake at a low entry price | Calendar booking from the $149 tier up | $49 to $299/mo with minute caps |
| Sameday | Trades-built answering at a flat monthly rate | ServiceTitan scheduling on published tiers | $449 to $789/mo with included minute blocks |
| Smith.ai | AI answering with live human backup | Native Housecall Pro integration | Free 25-call tier, then Pro at $150/mo |
Which AI receptionists fit HVAC best?
Nine platforms, listed alphabetically. Each entry opens with who it is genuinely best for, grades the criteria that matter in this trade, and closes with the honest trade-off, including our own.
Avoca: when you run an enterprise shop on ServiceTitan
Avoca is the category’s enterprise incumbent: a Y Combinator company (W23) that announced more than $125 million raised at a $1 billion valuation in April 2026, reports 800-plus operators across HVAC, plumbing, electrical, and roofing, and counts Goettl and TurnPoint among its customers. The integration story is real: Avoca is a listed ServiceTitan marketplace partner that books jobs directly back into ServiceTitan via API, with its own help center documenting the connection, and the marketplace listing says most customers are live within two weeks of onboarding. Pricing is quote-only, billed largely per minute, with third-party estimates around $1,000 to $3,000 per month, per Driive’s 2026 pricing write-up; there is no self-serve trial.
Dialzara: when the budget is the brief
Dialzara’s inbound tiers run $29 a month (60 minutes, $0.48 per minute overage), $99 (220 minutes, $0.45), $199 (500, $0.40), and $349 (1,000, $0.35), no contract, with warm transfers, bilingual English-Spanish handling, and calendar sync unlocked from the $99 Pro tier up, per its pricing page verified August 27, 2026. Setup is a self-editable prompt with call recordings and summaries included on every plan, so an owner can genuinely be answering by dinner.
Futuro: when the 2 AM call is your whole reputation (our product)
Futuro is our product, so judge this entry the hardest. The configuration for HVAC is built around the five calls above: safety-first triage scripts that classify no-heat and no-cool emergencies by your rules, instant on-call alerting with the full context, and an optional warm transfer to your rotation for the calls that warrant it. ETA memory means the “where is my technician” call gets answered from the appointment record instead of becoming another callback. The voice is the differentiator we lean on hardest: our VoiceAlive engine was rated human-indistinguishable by 94% of listeners in a blinded study we publish with its methodology, and it speaks 53 languages, switching mid-call when the caller does. Pricing is flat monthly from $200 on our published pricing page, with unlimited concurrent calls: your invoice in a record heat week is the same as a mild one. Deployment is done-for-you; we configure the triage rules, escalation path, and booking handoff with you rather than handing you a template. Hear it on our public demo line.
My AI Front Desk: when you want a zero-risk pilot
My AI Front Desk’s Business-in-a-Box plan runs $99 a month, or $79 billed annually, with 200 voice minutes included and overage drawn from a credit pool at about $0.25 per minute, per its pricing page verified August 27, 2026. A $20 Basic tier exists for evaluating the platform but includes no voice minutes, so it does not answer calls on its own. Setup is genuinely fast, the plan bundles web chat, SMS, and a lightweight CRM alongside the phone agent, and Zapier covers the middleware path to whatever your office runs.
OnCrew: when trade-tuned triage and fast alerts are the whole job
OnCrew is configured for HVAC, plumbing, electrical, and roofing intake with trade-aware emergency triage: $49 a month for 100 included calls, $149 for 400, and $349 for 1,000, with a flat $0.99 per-call overage, a 14-day free trial, and no contract, per its pricing page verified August 27, 2026. Urgent calls route straight to your cell under rules you set, with the callback request and full transcript delivered in about 90 seconds, per its site, and its own materials note the agent runs on Retell’s voice stack. Per-call billing has a genuinely useful property for this trade: a long, careful emergency call costs the same as a short one.
Retell AI: when your team wants to build and own the voice stack
Retell is the developer platform underneath several products in this category: published pay-as-you-go pricing of $0.07 to $0.31 per minute depending on the model and voice stack you choose, $10 in free credits, and 20 concurrent calls included on the base tier, per its pricing page verified August 27, 2026. If you have the engineering hours, you can build exactly the triage logic your shop wants and pay only for what you use.
Rosie: when you want home-services-native intake at a low entry price
Rosie’s tiers run $49, $149, and $299 per month for 250, 1,000, and 2,000 minutes respectively, per its pricing page verified August 27, 2026. The intake model is home-services native, so no-cool calls, diagnostic visits, and quote requests get sensible handling out of the box, and the $149 Scale tier adds calendar booking, warm and live transfers, and mid-call texting, which is the tier where it becomes a booking tool rather than a message-taker.
Sameday: when you want trades-built answering at a flat rate
Sameday is purpose-built for home services: Launch at $449 a month starting with 500 included minutes and three locations, Scale at $789 starting with 1,000 minutes, unlimited users on both, pro scheduling with ServiceTitan on the published tiers, and voice cloning and multilingual voices on the upper tiers, per its pricing page verified August 27, 2026. No overage rate or contract terms are published, which is worth clarifying on the demo call, and the company says most customers are taking calls in about 30 minutes of setup. The flat monthly shape with included minute blocks is the right billing architecture for a weather-driven trade.
Smith.ai: when distressed callers need a human safety net
Smith.ai’s AI Receptionist starts free with 25 calls a month ($3 per call beyond that), Pro at $150 a month including 75 calls at a $2.00 per-call rate, and Enterprise from $500, month to month with no contract, per its pricing page verified August 27, 2026. The defining feature is the escalation path: calls the AI cannot handle can transfer to live North America-based receptionists at any hour, and its Housecall Pro integration creates client records, logs call summaries, and books through your online scheduling link. The per-call rate moved from $2.00 overage since earlier this year; this edition catches the current structure.
Who actually books into ServiceTitan, Housecall Pro, Jobber, and FieldEdge?
“Integrates with your software” is the most abused sentence in this category, covering everything from a native, marketplace-listed API booking to a Zapier zap that emails your office a summary. The table below separates documented native booking from middleware, and shows how each claim was verified, because the difference decides whether a booked job appears on your dispatch board or in an inbox.
| Platform | ServiceTitan | Housecall Pro | Jobber / FieldEdge | How we verified |
|---|---|---|---|---|
| Avoca | Native API booking | Documented integration | Not documented publicly | ServiceTitan marketplace listing plus vendor help center |
| Sameday | Pro scheduling incl. ServiceTitan on published tiers | Not documented publicly | Not documented publicly | Vendor pricing page |
| Smith.ai | Via standard integrations | Native: records, summaries, booking link | Jobber request forms documented | Vendor blog and help documentation |
| Futuro (our product) | Booking handoff configured at onboarding | Booking handoff configured at onboarding | Booking handoff configured at onboarding | First-hand; our product |
| OnCrew | Zapier handoff | Zapier handoff | Zapier handoff | Vendor pricing page |
| Rosie | Calendar booking from Scale tier | Not documented publicly | Not documented publicly | Vendor pricing page |
| Dialzara | Zapier, Make; API on Elite | Zapier, Make | Zapier, Make | Vendor pricing page |
| My AI Front Desk | Zapier middleware | Zapier middleware | Zapier middleware | Vendor pricing page |
| Retell AI | Custom build on API | Custom build on API | Custom build on API | Vendor pricing and docs |
Native booking versus middleware
Native booking writes the job into your board with the customer record, the equipment notes, and the slot your capacity rules allowed. Middleware sends a notification or creates a calendar event, and your office finishes the data entry in the morning. Both can be the right answer; a one-truck shop running Google Calendar does not need a ServiceTitan API integration. What you should not accept is the word “integrates” without the follow-up question: show me a booked job landing in my system, on a screen share, before I sign.
What to ask on the demo call
Three questions settle it. First: which specific FSM objects does the integration write (customer record, job, appointment, or an email summary)? Second: does it respect my capacity rules and appointment windows, or does it book into a holding calendar? Third: when the integration fails at 2 AM, what does the caller hear and what lands in my inbox? Any vendor that has genuinely deployed in this trade answers all three without checking.
What does a missed call actually cost an HVAC company?
We are not going to quote a borrowed industry statistic here; we publish the math with every assumption labeled so you can substitute your own numbers. Our missed-call economics analysis walks the general model, and the calculator on our trades hub runs it with your inputs.
The math, with every assumption labeled
Assumptions, all adjustable: a residential shop fields 100 inbound calls a week in a peak month; a quarter of them arrive after hours or while your office is already on the phone and go to voicemail (labeled assumption: 25 missed calls a week); a quarter of those callers would have booked had someone answered (labeled assumption: a 25% close rate on answered inbound); the average repair ticket is $450 and a replacement install runs about $8,500 (labeled assumptions; substitute your actuals). That is roughly six lost jobs a week. Even if every one of them was only a repair ticket, that is about $2,700 a week, or over $11,000 across a peak month. One missed replacement lead in that pile erases the math entirely. Against that, the most expensive published flat-rate plan on this list costs under $800 a month.
The heat-wave volatility tax
The second math problem is the billing model. Minute-capped and per-call plans reprice themselves during your best weeks: triple volume in a heat dome means triple the overage, and a five-hundred-minute week blows through most entry tiers by Wednesday. Flat-rate plans invoice the same in a mild week and a record one. Neither is automatically right; a shop with genuinely steady volume can pay less on a metered plan. But model your worst week, not your average month, because in HVAC the worst week is where the year is made.
Which setup fits your shop?
The one-truck owner-operator
Your problem is answer-while-working: you cannot pick up from an attic. Start with a low-commitment self-serve option (My AI Front Desk, Dialzara, or Rosie’s entry tier, or OnCrew’s $49 plan) and demand two things on day one: emergency classification with an instant alert to your cell, and a warm-transfer option for the calls that need you now. If you want it configured for you rather than assembled by you, that is the done-for-you case, and it is what we built Futuro to be.
The five-to-ten-truck residential shop
Your problem is surge and status: the heat-wave spike and the daily “where is my tech” traffic. Prioritize concurrency, ETA memory, and a flat rate, because your volume is weather-driven and your invoice should not be. This is the segment Futuro is configured for, and Sameday is the credible trades-built alternative at a higher entry price. If you run ServiceTitan and want native marketplace booking, put Avoca and Sameday on the demo list and ask both the three integration questions above.
The commercial-heavy operation
Your problem is intake discipline: account recognition, SLA tiers, property-manager callers, and decision-makers who expect a person. The hybrid pattern wins here; Smith.ai’s live backup behind the AI is built for it, and Avoca’s enterprise motion fits if you already run a call-center operation. Whichever you choose, script the commercial-versus-residential split explicitly and test it with call four of the protocol.
The multi-location brand
Your problem is standardization: one intake standard across branches, one dashboard, and no per-branch phone roulette. Avoca is the enterprise incumbent for exactly this shape (its case studies are multi-brand platforms), Sameday’s tiers include multiple locations out of the box, and Futuro configures multi-line operations during onboarding. Insist on per-location triage rules; a freeze in your northern branch and a heat call in your southern one are not the same emergency.
How did we research this page?
We publish this page and sell one of the nine products on it, so method transparency is not optional here; it is the job.
Evidence level: operational first-hand knowledge, vendor-verified otherwise
Evidence level for this guide: emergency-triage structure, ETA memory behavior, and the five-call protocol come from operating HVAC deployments ourselves, first-hand. For the other eight platforms, every claim and price comes from public materials re-verified on August 27, 2026, pricing from each vendor’s own page at that date, integration claims checked against marketplace listings and vendor help documentation rather than marketing copy. Industry stakes come from the EIA, the EPA, and the Bureau of Labor Statistics, all linked inline. The missed-call math is a labeled scenario with stated assumptions, not a billing quote from any vendor and not a borrowed industry statistic.
What we did not do
What we did not do: we did not run recorded test calls against competitor platforms yet. The five-call protocol is published above as a reusable CC-BY harness; recorded runs with transcripts and scores are scheduled for our quarterly re-verification cycle and will be added when they exist, and we would rather say that plainly than imply a test we have not run. We did not load-test competitor concurrency; surge behavior is assessed from published specifications and pricing mechanics. We did not independently verify triage depth beyond public materials and demo lines. We did not re-measure voice quality here; that evaluation lives in our voice-quality comparison, including the blinded study we link rather than restate. We did not accept vendor input, review access, or paid placement, and no vendor saw this page before publication. And we did not test the one scenario that matters most to you: your shop, your rules, your heat wave. That demo is yours to run: call any platform on this list, ours included, and run the five calls.