AI for contractors: estimating, takeoffs, and the follow-up nobody made
A contractor loses bids in two places: the takeoff that took three nights, and the quote that went out four days late. AI reaches both. It counts the plans in minutes and it sends the follow-up nobody had time for. The judgment that wins the bid is still the estimator's, and the tools that know that are the ones worth paying for.
AI fits a contractor in three places: takeoffs and estimating from the plans, the phones and the follow-up on quotes, and the paperwork between the job and the invoice. Published estimating tools run from $35 a month for Kreo to $299 a month per user for Togal, with Handoff at $149 for remodelers and STACK at roughly $158 to $250 a month for general contractors (Dan Cumberland Labs). The tool counts; the estimator prices the risk, the crew, and the client, which is the part that wins.
Where a contractor loses the bid
Two places. The first is the takeoff: counting fixtures, measuring runs, and pricing materials off a set of plans, which takes an estimator nights and caps how many bids the company can make. The second is after the estimate is done: the quote that went out late, the one that never got a second touch, the inquiry that cooled while everyone was on site. The trade surveys say most companies have not touched either. ServiceTitan's 2026 survey of more than 1,000 contractors found more than 70 percent calling AI relevant and about 12 percent using it in their workflow.
1. Takeoffs and estimating
Takeoff software reads the plans, detects and counts the elements, measures the quantities, and hands the estimator a bill of materials to price. The AI part is the detection. Dan Cumberland Labs' August 2026 comparison puts the useful boundary in one line: AI could automate up to 49 percent of construction tasks, and the other 51 percent, the judgment calls that win bids, still belongs to experienced estimators.
| Tool | Published price | What it does | Best fit, per the guide |
|---|---|---|---|
| Kreo | $35 a month | AI-assisted detection and measurement from 2D plans and BIM | Small contractors wanting to experiment with AI takeoff |
| Handoff AI | $149 a month | Takeoff, CRM, proposals, and invoicing in one | Residential remodelers and small contractors |
| STACK | About $158 to $250 a month, billed yearly | Full preconstruction workflow with AI assist and integrations | General contractors needing the full workflow |
| Togal.AI | $299 a month per user | Automated takeoff from blueprints | Mid-size GCs and subcontractors doing 50 or more estimates a year |
| Beam AI; ProEst; ConEst; TaksoAi | Per project or custom | Service-based, enterprise, electrical, and mechanical specialists | Quote required |
Prices and fit as published by Dan Cumberland Labs (August 3, 2026). We have no relationship with any tool named.
Which tool fits which contractor
The table sorts by volume. A remodeler doing a dozen estimates a month wants the all-in-one, because the takeoff is small and the proposal and the invoice are where the time goes. A trade subcontractor doing fifty or more bids a year wants the dedicated takeoff tool, because the counting is the bottleneck. A general contractor wants the workflow that hands the takeoff to the estimate to the schedule without re-entry. Buying the GC tool for a remodeler is paying for integrations nobody uses; buying the remodeler tool for a sub is paying to count by hand.
2. The phones and the follow-up
The second leak is cheaper to fix than the first. An AI receptionist answers, captures the caller and the job, and books into the field service or CRM platform; published starting prices run $49 a month for Goodcall (HVAC Tools AI), and the integration rule from the trades applies: if it cannot book into Jobber, Housecall Pro, or the platform you run, it is an answering machine. Then the follow-up: a quote that has not been answered in three days gets a text, then a call task for a person, then a last message. Nobody decided to drop those leads. They dropped because the follow-up had no trigger. Give it one.
3. The paperwork between the job and the invoice
Change orders, daily logs, material receipts, lien waivers, and the invoice that waits for all of them. This is the gap between the field and the office, and it is where most small contractors lose days of cash flow. A system that turns the daily log into the change order draft, matches receipts to the job, and produces the invoice the day the work is done is custom in most companies, because the workflow is the company's own. It is the same shape as every build: a trigger, one action, an exception path to a person, and a log.
Count the quotes that went cold.
The ten questions ask which leads dropped because nobody had time, what gets rebuilt every time, and what crosses systems. For a contractor the answer is the follow-up or the takeoff, and the result says which is first.
What stays with the estimator
- The price. The tool counts and applies the price book. The estimator prices the risk, the site, the crew, and the client.
- The unusual condition. Anything the plans do not show goes to a person who has stood on the site.
- Safety. Not a software decision on any job.
- The relationship. The follow-up text is automated. The conversation that closes the job is not.
What it costs
Estimating tools are subscriptions in the table above, from $35 to $299 a month. Phones start around $49 (HVAC Tools AI). General software and usage costs for small businesses run $50 to $300 a month per system plus $100 to $500 a month in usage when a tool calls a model on your data (AIessentials). Set the takeoff line against the bids the company could not make last year, and the follow-up line against the quotes that went cold, and the arithmetic is short.
What we have and have not built
We have not built a system for a contractor, and this article does not claim otherwise. It is written from a published tool comparison, the trade surveys, and the pattern in our own work: a repeated process with a trigger, one action, an exception path to a named person, and a log. The paperwork between the job and the invoice is the kind of gap we build in, and it is scoped after someone has watched a week of it.
The tool counts. The estimator wins the bid. Buy the first so the second has time to do it.
What to hold on to
- Two leaks: the takeoff and the follow-up. One caps how many bids you can make; the other loses the ones you made.
- Buy the tool for your volume. A cheap experiment for a small shop, an all-in-one for remodelers, a dedicated takeoff tool for high-volume subs and GCs.
- The tool counts; the estimator prices. Up to 49 percent of tasks automatable; the judgment that wins bids is the rest.
- Give the follow-up a trigger. Three days unanswered, a text, a call task, a last message. Leads drop when nobody owns the next step.
- The job-to-invoice paperwork is the custom gap. Change orders, receipts, waivers, and the invoice that waits for them.
Questions owners ask us
What AI tools do contractors use for estimating?
Takeoff and estimating tools that read plans and count elements: Kreo at $35 a month for small contractors experimenting, Handoff AI at $149 for remodelers, STACK at roughly $158 to $250 a month for general contractors, and Togal.AI at $299 a month per user for subs and GCs doing fifty or more estimates a year (Dan Cumberland Labs). Enterprise and specialty tools are quoted.
Can AI do a construction takeoff?
It can detect and count elements on plans and measure quantities, which is the part that took nights. It cannot price the risk, the site conditions, the crew, or the client, and the published guides put the automatable share of construction tasks at up to 49 percent (Dan Cumberland Labs). The estimator still owns the number.
How do contractors stop quotes from going cold?
Give the follow-up a trigger. A quote unanswered for three days gets a text, then a call task for a person, then a final message, all automatic. Most quotes are not lost to price. They are lost because nobody owned the next touch while the crew was on site.
Which AI estimating tool is best for a small contractor?
For a remodeler doing a dozen estimates a month, an all-in-one such as Handoff AI, because the proposal and the invoice are where the time goes. For a trade subcontractor doing fifty or more bids a year, a dedicated takeoff tool such as Togal.AI, because the counting is the bottleneck. Match the tool to the volume.
How much does AI cost for a contractor?
Estimating tools run $35 to $299 a month (Dan Cumberland Labs). An AI receptionist that books into your platform starts around $49 a month (HVAC Tools AI). General software and usage costs run $50 to $300 a month per system plus $100 to $500 a month in usage when a tool calls a model on your data (AIessentials). Set it against the bids you could not make and the quotes that went cold.
Has Prometheus built AI for a contractor?
No, and this article says so. It is written from a published tool comparison, the trade surveys, and the pattern in our shipped work: a repeated process with a trigger, one action, an exception path to a person, and a log. The paperwork between the job and the invoice is the kind of gap we build in.
Sources
Tool prices and fit are quoted from a published 2026 comparison; the survey figures from ServiceTitan; phone prices from a trades tool guide. We have no relationship with any tool named. Checked September 5, 2026.
- Dan Cumberland Labs, "Best AI Construction Estimating Software in 2026". August 3, 2026. Tools, prices, fit, and the 49 percent figure.
- ServiceTitan, "Understanding the HVAC AI Landscape in 2026". April 6, 2026. The contractor survey.
- HVAC Tools AI, "AI Tools for HVAC Contractors: What Actually Works in 2026". Updated August 2026. Receptionist prices and the integration rule.
- AIessentials, "AI Consultant Cost (2026)". Updated August 21, 2026. General software and usage costs.
- Our case studies, the pattern this article applies.