HVAC AI receptionist and 24/7 answering service

Your phones go quiet in April, then ring nonstop the first hot week of June, when every AC in town fails at once. Tell your carrier to forward calls when your line is busy or nobody picks up, or forward all of them. LobbyStack answers whatever reaches its number. Plans set no limit on how many calls it answers at once, and those calls share one pool of minutes. It asks each caller for the system type, symptoms, and address, then books the next open slot or takes a message for your office.

• Answers the calls your forwarding rule sends: busy, unanswered, or all
• Plans set no limit on how many calls it answers at once
• Books the next open slot or leaves your office a message with the caller's details

You write the urgency rules in plain language, based on symptoms, indoor temperature, and who lives in the home. A caller with a dead furnace in January and an infant in the house gets your on-call tech. A caller whose thermostat is set to cool gets a quick answer from troubleshooting steps you approve, like checking the breaker or the filter. For a gas smell or a CO alarm, you write the safety steps, such as leaving the house and calling the gas utility's emergency line or 911. The receptionist can share them before it transfers. Place a test call to hear how it handles one. Transfers go to one number. If you haven't set a transfer number, the receptionist takes a message. If the transfer can't go through, it tells the caller and offers to take a message, and your team can get a "Live call transfer failed" alert. Once your tech's phone starts ringing, the receptionist leaves the call. If your tech doesn't pick up, the caller reaches that phone's voicemail, if it has one.

• Escalates on symptoms, indoor temperature, and who lives in the home
• Treats gas smells and CO alarms as urgent and transfers right away
• Offers to take a message if the transfer can't go through

Yes. A homeowner pricing a new system will wait a day for your callback. Two weeks into peak season, your callbacks run later than that, and they sign with someone else. LobbyStack asks for the home size, system age, and fuel type, then books the estimate visit from your opening hours while the caller is on the phone. Connect Google Calendar and it skips your busy times and adds the visit as an event. If the caller agrees, LobbyStack texts a confirmation and a reminder 24 hours before the visit, to US and Canadian numbers only. If you'd rather approve each visit, switch to request mode: the receptionist takes the caller's preferred time, and your team confirms it.

• Collects home size, system age, and fuel type
• Books estimate visits into Google Calendar while the caller is on the line
• Texts a confirmation and a 24-hour reminder when the caller agrees

Prices as of October 2026: Starter costs $30 a month for 150 voice minutes, and Pro costs $100 a month for 500. If your average call runs 3 minutes (our assumption), Starter covers about 50 calls and Pro about 165. Now take a busy July with 300 calls, also our assumption. That's 900 minutes. Pro costs $100 plus 400 extra minutes at $0.18, or $172. Starter costs $30 plus 750 extra minutes at $0.20, or $180. The two plans cost the same at 500 minutes, and Pro costs less above that. LobbyStack counts usage by the second, so a 90-second call uses 1.5 minutes. Billed annually, Starter costs $288 a year ($24 a month) and Pro $960 ($80 a month).

• No setup fee on any plan
• Calls under 10 seconds and calls the receptionist ends as spam don't count toward your minutes
• Owners and admins can set a monthly overage cap under Settings > Plan. There's none by default, and new calls get a busy signal once you reach it

Yes. Each call opens in your default language: English, French, Spanish, Serbian, German, Brazilian Portuguese, Italian, or Dutch. If the caller asks to switch or speaks another language, the receptionist answers in that language. It runs on OpenAI GPT-Live, which handles 70+ languages, including Spanish and Serbian. LobbyStack sends confirmation and reminder texts in your default language. If you save a contact's language as Spanish or Serbian through the API, that contact gets them in that language. The pricing page lists no language add-on.

• Opens in your choice of 8 languages, then follows the caller's language
• 70+ languages on GPT-Live, including Spanish
• Your urgency rules and booking settings stay the same in every language

Not directly. LobbyStack has no integration with ServiceTitan, Housecall Pro, or Jobber, and Google Calendar is the only calendar it connects to. It sends signed webhooks for six events: call completed, appointment booked, appointment rescheduled, appointment cancelled, message taken, and contact created. It also has a REST API with scoped keys, and Zapier connects through the webhooks and the API. An MCP server lets Claude or ChatGPT read your calls and book appointments. If you already run your shop in Jobber or Housecall Pro, their built-in receptionists book jobs into that software. LobbyStack can't. Jobber Receptionist costs $29 a month for 30 conversations ($0.79 each after) on top of a Jobber plan. Housecall Pro sells CSR AI as a paid add-on with no published price. We checked both on October 9, 2026.

• Books into Google Calendar
• Sends call and booking data out through webhooks and the REST API
• Connects Zapier through webhooks and the API