Blog · 2026-10-22
AI estimating software for contractors: which kind fits your shop, and how to test it before you trust it (2026)
A plain guide for plumbing, HVAC, electrical and roofing owners: the three kinds of AI estimating tools, what each one actually does, published prices, and a one-afternoon test using jobs you already priced.
“Can AI write my estimates?” comes up a lot now. Search “ai estimating software for” and Google fills in plumbing, HVAC, electrical contractors and mechanical contractors. The honest answer is yes for the first draft, and no for the final number. The tools are fast. You still own the price.
This guide sorts the AI estimating tools we list into three kinds, shows what each vendor says it does and charges, and gives you a simple way to test one with your own past jobs. Prices come from each vendor’s own site as of October 2026. Where a vendor does not publish a price, we say so.
The short version
- Service and repair shops (one truck to about ten techs) want a describe-the-job quoting app. You talk or type the job, it drafts line items, the customer signs on their phone.
- Remodel, restoration and insurance work fits photo and plan estimating, where the AI reads photos, PDFs or reports and builds room-by-room line items.
- Commercial MEP subs bidding to GCs need plan takeoff and bid management. These read drawing sets and specs. They are a different product for a different buyer.
- Whatever you pick, test it on three jobs you already priced before you send a single AI estimate to a customer.
Kind 1: describe-the-job quoting apps (service and repair)
These are for the owner who quotes in a driveway. You describe the work in plain words, the app turns it into a priced estimate, and the customer can accept it from a link.
| Tool | What it does | Published price |
|---|---|---|
| TitanQuote | Speak the job in any language, get an English estimate; customer signs and pays a deposit on their phone; automatic follow-up emails at 48 hours and 7 days | Starter free (watermark, 1% deposit fee); Pro $39/mo; Business $89/mo |
| FieldBolt | Plain-English job description to material list, labor and PDF bid; material prices pulled from Home Depot and Lowe’s; Pro adds a pre-send bid check and crew dispatch | Starter $79/mo; Pro $129/mo; Team $199/mo; 14-day trial |
| TradesQuote | Builds line items from your own uploaded price lists and SOPs; takes text, photos, PDFs or CAD files; client accepts and signs from a link | Starter $49/mo (50 estimates); 14-day trial; higher tiers listed as coming soon |
| CostSnap | Reviews job photos and voice notes and returns scope, measurements and a local price range you edit with your own rates | Free (3 lifetime estimates); $99.99/mo; $199.99/mo |
What to watch. The big difference is where the prices come from. TradesQuote prices from the price lists you upload. FieldBolt pulls retail material prices. CostSnap gives a local range. If your supply house beats big-box prices, or you sell flat-rate, a tool that prices from your own book will need less fixing.
If you already run Jobber or Housecall Pro, check what your current software does before you add another app. TradesQuote, for example, says it sits on top of tools like Simpro and Jobber rather than replacing them.
Kind 2: photo and plan estimating (remodel, restoration, renovation)
These tools read more than a sentence. They take site photos, plans, PDFs or inspection reports and draft a full line-item scope.
| Tool | What it does | Published price |
|---|---|---|
| Figger Up | Estimates from photos, plans, PDFs and spreadsheets for restoration (IICRC S500/S520), renovation, electrical, plumbing and HVAC; reads Xactimate sketches and iGuide reports | Free first month (20 AI estimates, no card); then from $99.95/mo |
| Handoff | Voice notes, photos or plans to localized estimates, proposals and material lists for remodelers and residential builders | Flex $149/mo; Pro $239/mo and Scale $719/mo on annual terms; 7-day trial |
| Hover | 3D models from smartphone photos, with automated estimating and proposals (roofing and exteriors) | See site |
What to watch. Labor hours. One remodeler testing Handoff posted on Reddit that the total looked right but the breakdown had far more demo hours than his two-person crew needs. He kept it for cross-checking, not for sending. That is a fair way to start with any of these.
Kind 3: plan takeoff and bid management (commercial MEP)
If you bid commercial work off drawing sets, you want takeoff software, not a quoting app.
| Tool | What it does | Published price |
|---|---|---|
| Rebar | For commercial mechanical teams: triages inbound bid requests, counts equipment from schedules, runs ductwork takeoff, answers spec questions with the clause cited | Not published (book a meeting) |
| Biltix | For commercial MEP subs: reads drawing sets and specs, runs mechanical, electrical and plumbing takeoff with counts marked on the sheet, drafts the proposal | Not published |
What to watch. Accuracy on real plan sets. In an r/estimators thread titled “Has anyone actually had success with an AI estimating tool?”, one estimator who has built these tools put takeoff accuracy at about 60 to 70 percent and said you still have to verify the work “just like you would on a junior employee.” That is one person’s experience, not a study. Treat it as a reason to check every count.
The one-afternoon test
Do this before you trust any AI estimate with a customer. It costs nothing on a free trial.
- Pull three jobs you already priced and won. Pick a small repair, a mid-size job and one with a twist (a permit, a second-story run, an old panel).
- Feed each one to the tool the way you’d describe it on site. Don’t clean up your words. If it can’t handle how you talk, it won’t save you time.
- Compare line by line, not just the total. A right total with wrong parts is luck. Check labor hours, material counts and what it left out.
- Check the missing items. Permits, disposal, trip charge, haul-away, after-hours rate. These are where money leaks.
- Time it. Include the minutes you spent fixing it. If the draft plus fixes takes longer than your old way, it’s not ready for you.
- Load your own prices if the tool allows it. Then run the same three jobs again. The gap should shrink a lot. If it doesn’t, move on.
If a tool passes on all three jobs, use it for drafts and keep reviewing every estimate for the first month.
Rules that keep AI estimates from costing you money
- Your price book wins. Retail material prices and regional ranges are a starting point. Your supplier cost and your labor rate are the real numbers.
- Never send without reading. Treat every AI draft like work from a new hire. Check it, then send it.
- Watch the follow-up, not just the quote. A fast estimate helps most when it goes out the same day and gets a follow-up. TitanQuote does this automatically. If your tool doesn’t, set a reminder. Our speed-to-lead guide covers why timing matters.
- Don’t pay for two systems. If your field service software already has good estimates, an AI add-on there may beat a separate app.
FAQ
Can AI do construction estimates by itself? It can draft them fast. Estimators who use these tools online say the drafts still need a person to check them, and we agree.
Is there free AI estimating software? TitanQuote has a free Starter plan (with a watermark and a 1% deposit fee). CostSnap gives three free estimates. Figger Up offers a free first month. FieldBolt and TradesQuote have 14-day trials with no card.
What’s best for HVAC estimating? For residential service quotes, start with a describe-the-job app like FieldBolt or TradesQuote. For commercial mechanical bids off plans, look at Rebar or Biltix. Browse all of them on our estimating category page or the HVAC page.
Will it know my local prices? Some tools pull retail or regional prices. That is not your price. Upload your own price list where the tool allows it, and check every line.