Answering service vs AI receptionist: what it costs a plumbing shop

If you've decided someone (or something) should answer the calls your shop misses, the next question is what it costs. The honest answer is that it depends on how the service bills, and on how many calls you get in your busiest month, not your average one.

This guide puts published prices side by side, explains the three ways these services charge, and walks through the math so you can do it for your own shop.

A note on fairness: we make one of the products in this comparison (Emma, at the bottom). We've used the other companies' own pricing pages, linked below, and we show the cases where they come out cheaper.

The three ways answering is priced

1. Per minute. You buy a bundle of receptionist minutes each month. Long calls use more. Ask how calls are rounded and what extra minutes cost.
2. Per call. You buy a bundle of calls each month, and each call over the bundle costs extra. Ask what counts as a call (for example, whether spam and wrong numbers count).
3. Flat monthly. One price no matter how many calls come in. Simple to budget, but you pay the same in a slow month.

Published prices (checked October 18, 2026)

These are list prices from each company's pricing page on the date above. Prices change, so click through before you decide.

What the pages say about other costs:

• Ruby says there are no hidden fees for activation, onboarding, setup, customization, or coverage during certain periods. Its pricing page doesn't list the rate for minutes over your plan, so ask before you sign.
• Smith.ai says both its live and AI services are month to month, with no long-term contracts. The AI receptionist FAQ asks for 30 days' notice to cancel. The live plans have no setup fees, offer a 10% discount if you sign up for 12 months, and charge extra for some add-ons, such as $0.25 per call for recording and transcription.
• Spam calls: Smith.ai's live plans say they don't count wrong numbers or spam toward your quota. On the AI plans, every answered call counts by default, but you can remove up to 10% of calls each billing cycle for spam. Ruby's page doesn't say, so ask.

Run the numbers for your shop

You need two numbers: how many calls would reach the service in a month, and (for per-minute plans) how long a typical call lasts. If you don't know them, keep a log for a week. Count the calls your shop doesn't pick up, and time a few of the calls you do take.

Below are two made-up months to show the math. They aren't averages for anyone's shop. Swap in your own numbers.

A normal month: 60 calls, about 3 minutes each

A freeze month: 150 calls, about 3 minutes each

Price the plan against your busiest month, not your average one. Check last winter's call log: a cold snap may be your busiest stretch.

Two things stand out. Live receptionists cost noticeably more in a busy month, because you pay for every minute or call. And on price alone, a per-call AI plan comes in well under a flat $750, at $105 and $270 in these examples. If price is the only thing you care about, that's the answer.

Where each one passes $750 a month

Using the same published prices and 3-minute calls (if your calls run longer, Ruby's per-minute plans fill up sooner; at 5 minutes a call, the 200-minute plan covers only 40 calls):

• Smith.ai live passes $750 at about 70 calls a month: the 30-call plan plus extra calls at $11.50 each.
• Ruby stays at $720 up to 200 minutes (about 66 calls of 3 minutes). Past that, the next published plan is $1,725.
• Smith.ai AI stays under $750 through its published 300-call tier ($500).

What the price doesn't tell you

The cheapest line in a table isn't the cheapest choice if the messages you get back are wrong or incomplete. A job lost to a bad callback number costs more than any plan on this page. Before you pick, test each finalist the same way:

1. Call it yourself and play a real customer. Use a real problem: "My water heater is leaking into the garage."
2. Mumble your phone number, or correct yourself halfway through. Does it read the number back?
3. Act panicked about water on the floor. Does it treat that as urgent, and does that reach you right away?
4. Ask "how much will this cost?" and "when can you get here?" It shouldn't make promises your shop hasn't made.
5. Check what lands in your inbox and how long it took.

Also ask every company the same questions:

• What counts as a billable call or minute? Are spam calls and hang-ups billed?
• What does a call over my plan cost?
• Is there a setup fee, a minimum term, or a cancellation fee?
• Do after-hours or holiday calls cost more?
• How do I turn it off, and how fast does my line go back to normal?

When a live answering service is the better choice

AI isn't right for every shop. A human service may be worth the higher price if many of your callers won't talk to a machine, or if you want things an AI receptionist may not do. Smith.ai's live plans include transfer destinations for putting calls through, and Ruby lists payment collection. Some callers will hang up on any machine, however good it is.

When flat pricing makes sense

A flat fee is about predictability. You know the bill before the month starts, and a freeze week doesn't change it. The trade-off is that you pay the same amount in a quiet month. Whether that's worth it depends on how much your call volume swings and how much you value not having to think about it.

Anchorline makes Emma, the flat-fee option above. She answers only the calls your shop doesn't pick up, reads back the caller's number, rings your cell on urgent jobs, and emails you every job. The plan is $750 a month, 7 days free with no card (ends at noon on day 7), and no contract. To hear her handle a call before you compare, ring the demo line at (615) 235-0039.