Comparison · Sona

Mainbrace vs Sona — built for plumbing, not generic enterprise AI.

Sona answers calls well. Mainbrace answers calls well, then triages the photo against your previous plumbing work, drafts a regional-priced quote in your voice in under six minutes, and chases the invoice at day 3, 7, and 14 until it clears. Side-by-side, row by row, here is what plumbers actually switch for.

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Designed for the one-person plumbing operationNo setup fee on the Solo plan

What solo plumbers get from Mainbrace that Sona doesn’t

Four plumber-specific wins, one per row of the pipeline.

Sona is a generalist AI receptionist. Mainbrace is built for the one-truck plumbing shop. Every win below comes from the same promise: from the first call to the last invoice, the system acts like a plumber — not a generic small-business bot.

Inbound calls answered in your shop name, day and night — emergencies triaged before they reach voicemail.
Photo triage that pulls from your prior jobs — the photo classified against work you have already closed, not a generic image category.
Regional-priced quotes drafted in your voice in under six minutes, ready to send from your shop name.
Invoice follow-up at day 3, 7, and 14 — polite, automated, and paused the moment the payment clears.

Side by side

The full feature comparison, row by row.

Every capability a solo plumber cares about, plus the five trade-offs that decide whether Sona is enough or you need an operations stack. No hidden asterisks.

Capability	MainbraceBuilt for the solo plumber.	SonaAI receptionist for general small business.
24/7 call answeringInbound coverage in your shop name, with emergency triage on every after-hours call.	Yes — your shop name, your tone, emergency triage built in.	Standard answering service; not plumbing-specific.
Photo triageThe caller’s photo classified against your prior plumbing work, with a likely cause and a labor band.	Classified against your prior plumbing jobs, with a likely cause.	No plumbing-specific image classification.
Quote generationRegional-priced, drafted in your quote voice, ready to send without leaving the call.	Regional-priced, drafted in your quote voice in under six minutes.	Generic estimate templates; humans edit every line.
Payment follow-upDay 3 / 7 / 14 cadence that pauses the moment the invoice is paid.	Automated day 3 / 7 / 14 cadence, pauses on payment.	Standard payment reminders; no plumbing-aware cadence.
Knowledge base persistencePrivate job-by-job memory that compounds — call, photo, diagnosis, close rate.	Yours, scoped to your shop — sharpened with every closed job.	Limited per-job memory across calls and invoices.
Solo-operator fitBuilt for the one-truck shop rather than a multi-shift office or front desk.	Yes — calibrated for the one-person plumbing operation.	No solo-operator specific tuning.

Why plumbers switch

Four reasons Sona runs out of runway on a plumbing truck.

Generic answering is the right first step. It is not the second step. Here is what the next step actually requires — and what a plumber gets when they pick Mainbrace instead.

Plumbing specificity, on the first call

Sona is a competent AI receptionist for general small business. Mainbrace speaks plumbing from the greeting forward: it recognises the fixtures, the urgency of a water-heater swap, and the difference between a clogged stack and a sewer-line break. The first minute on the phone reads as your shop, not a generic bot.

Day 3 / 7 / 14 follow-up that sets and forgets

A polite, automated cadence that pauses the instant the invoice clears. A paid invoice never gets a nag email and an unpaid one never falls off the truck. The cadence is plumbing-aware — tuned to the cycle your customers actually pay on, not a flat weekly blast.

A knowledge base that compounds on the truck

Every closed job — call, photo, diagnosis, parts, parts markup, close rate — sharpens the next triage, the next quote, the next follow-up. The third water-heater swap is faster than the first, and the memory stays private to your shop rather than pooling with every other Sona customer.

Pricing and voice for the one-truck shop

Regional pricing patterns lifted from your own closes, not generic benchmark tables. Quote voice consistent with how you actually write estimates. Built for the operation where the owner is also the dispatcher, the technician, and the AR person — without asking that person to become a prompt engineer.

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Ready when you are

Pick the row, then put an apprentice on the truck.

Start at $49/mo with unlimited answering, or book a setup and we’ll map your pricing and quote voice with you on the truck. Setup-fee refundable if the apprentice does not fit — no contracts.

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mainbrace-10@polsia.appSetup-fee refundable if the apprentice does not fit