Quotr.ai vs STACK: AI Takeoff and Estimating Compared (2026)
Quotr.ai and STACK are both browser-first AI takeoff and estimating platforms, so this is a true head-to-head, not a cloud-versus-desktop one. STACK is the established incumbent: in the business since 2000, with a deep assembly library and a large, loyal user base. Quotr.ai is the newer, AI-native platform that carries the work past the estimate into procurement, adds a done-for-you estimating service, and includes an AI assistant that reads your plans. It also starts lower and bills monthly.
Here is how the two compare on AI, estimating, procurement, support, and pricing.
Which tool is right for you
Choose Quotr.ai if:
- You want AI-native takeoff with per-item confidence scores and an audit trail back to the sheet, rather than AI layered onto an older tool.
- You want procurement connected to the estimate. Quotr.ai links quantities to factory-direct sourcing, so a priced estimate becomes bought materials.
- You want the option to hand a bid off. Quotr.ai Service returns a priced estimate from senior cost estimators, which STACK’s self-serve model does not offer.
- You want an AI assistant you can ask about your plans, that can run a takeoff for you or guide an estimator through one.
- You want a lower, monthly entry point and published pricing (from $79 per seat) instead of an annual contract.
Choose STACK if:
- You want a proven, mature platform with a long track record and a large, established user base.
- You rely on a deep item and assembly library with years of refinement behind it.
- Plan management (OCR plan search, overlay, version control) and bid tracking are central to how you work.
- You prefer a widely adopted incumbent your peers already use, and an annual contract is fine.
Quotr.ai vs STACK at a glance
| Decision criteria | Quotr.ai | STACK |
|---|---|---|
| AI takeoff | AI-native, 95–99% on clean vector PDFs (internal benchmarking), confidence-scored | STACK Assist and STACK IQ, AI on a mature platform |
| AI assistant | Ask plan questions; run a takeoff or guide an estimator through one, cited to the sheet | STACK IQ: natural-language takeoff and estimating prompts (launched 2026) |
| Estimating | Built in (your cost data or a database) | Built in, deep assembly library |
| Procurement | Built in (factory-direct, DDP) | Not a core feature |
| Done-for-you option | Yes, Quotr.ai Service (senior cost estimators return a priced estimate) | No, self-serve software only |
| Plan management | Supported | A core strength (OCR, overlay, version control) |
| Pricing | Lite $79/seat/mo; Plus $299; Enterprise custom; monthly; 7-day trial | ~$2,599–$2,999/user/yr, annual; team discounts; 7-day trial |
| Reviews | Newer entrant; G2 profile live | 4.5/5 from ~78 G2 reviews |
| Best fit | AI-native takeoff plus estimating and procurement, with a done-for-you option | A proven, mature cloud takeoff and estimating platform |
What each tool does well
Quotr.ai strengths
- AI-native takeoff with per-item confidence scores and an audit trail, 95 to 99% on clean vector PDFs in internal benchmarking.
- Procurement built in: factory-direct sourcing (DDP), so a priced estimate turns into bought materials instead of a handoff to other tools.
- A done-for-you option (Quotr.ai Service) staffed by senior cost estimators, returning a priced, decision-ready estimate.
- An AI assistant that answers plan questions, cited to the sheet, and can run a takeoff or guide an estimator through one.
- A lower monthly entry point ($79 per seat) with published pricing and a 7-day free trial.
STACK strengths
- A mature, proven platform, in the business since 2000, holding 4.5 out of 5 from about 78 G2 reviews.
- A deep, long-refined item and assembly library, one of the most established in the category.
- Strong plan management: OCR plan search, overlay, and version control.
- STACK IQ, launched in 2026, brings AI-driven takeoff and estimating from natural-language prompts.
- Bid tracking and cloud collaboration in one place. Reviewers consistently call it intuitive and easy to learn.
The AI assistant for your plan set
One of Quotr.ai’s defining features is its AI assistant. You ask it questions the way you would ask ChatGPT, and it answers from your actual drawings, cited to the exact sheet. “How many receptacles on level 2?” “What is the ceiling height in the lobby?” “Which sheet has the panel schedule?” You get the answer without scrolling a 60-page set by hand.
It works two ways:
- Guided. The assistant walks an estimator through the takeoff one step at a time, pointing to what to measure and where to find it. Useful for a faster pass, or for bringing someone newer up to speed on a set.
- Automated. The assistant runs the takeoff itself and returns it with per-item confidence scores, so you review the flagged items rather than counting from scratch. STACK has its own AI in this space: STACK IQ (2026) takes natural-language prompts to drive takeoff and estimating. The practical difference is less “who has AI” and more how the rest of the workflow is built around it, which is where procurement and the done-for-you service come in below.
Two things STACK does not do: procurement and a done-for-you desk
STACK takes you from plans to a takeoff to an estimate and a proposal, then hands you off. Quotr.ai keeps going in two ways STACK’s model does not cover:
- Procurement. Quotr.ai links your priced quantities to factory-direct material sourcing, delivered door-to-door, so the estimate supports the buyout rather than ending at a proposal.
- A done-for-you desk. When you would rather not run a bid in-house, Quotr.ai Service puts senior cost estimators on it and returns a priced estimate in 3 to 4 business days (or a pro forma in 2 to 3), scoped per project. STACK is self-serve software only. Neither is a knock on STACK, which is a focused, well-built takeoff and estimating platform. They are simply workflow that Quotr.ai covers and STACK leaves to other systems.
When STACK is the better pick
Maturity is the clearest reason to choose STACK. It has been doing cloud takeoff since 2000, it carries a deep and heavily refined assembly library, and its 4.5/5 from about 78 G2 reviews reflects a product teams rely on daily. If a long track record and a large peer base matter to you, that is real.
Plan management is another. STACK’s OCR plan search, overlay, and version control are long-standing strengths that suit teams managing large, frequently-revised sets. And with STACK IQ, it now brings AI natively rather than leaving AI to a newer entrant. If your procurement already works and an annual contract fits your budget, STACK does its core job well.
The things to weigh: STACK bills annually (roughly $2,599 to $2,999 per user per year, with AI on the higher tier), and some users report renewal quotes rising well above the first-year price, so budget for that.
Try it on your own plans
Upload a plan set and run a real takeoff, estimate, and bid in one session, then see it carry into procurement. Start a free trial, explore Quotr.ai Software, or talk to our team. For the wider field, see our STACK alternatives roundup.
FAQs
What is the main difference between Quotr.ai and STACK?
Both are browser-first AI takeoff and estimating platforms. STACK is the mature incumbent with a deep assembly library and strong plan management. Quotr.ai is AI-native and goes further than the estimate: it adds factory-direct procurement, a done-for-you estimating service, and an AI assistant that reads your plans, at a lower monthly price.
How much does STACK cost compared to Quotr.ai?
STACK bills annually, roughly $2,599 to $2,999 per user per year, with AI features on the higher tier and discounts for teams of three or more. Quotr.ai is $79 per seat per month (Lite), $299 (Plus), Enterprise custom, billed monthly with a 7-day trial. Some STACK users also report renewal increases, so budget beyond the first-year price.
Does STACK have AI takeoff?
Yes. STACK offers AI through STACK Assist and, as of 2026, STACK IQ, which drives takeoff and estimating from natural-language prompts. Quotr.ai is AI-native, with confidence-scored takeoff and an assistant that can run a takeoff or guide an estimator through one. The larger difference is that Quotr.ai also connects the estimate to procurement and a done-for-you desk.
Does STACK include procurement or a done-for-you service?
Procurement is not a core STACK feature, and STACK is self-serve software without a done-for-you desk. Quotr.ai builds factory-direct procurement into the workflow and offers Quotr.ai Service, where senior cost estimators return a priced estimate for you.
Can I ask Quotr.ai questions about my plans?
Yes. Quotr.ai’s AI assistant reads your plan set, so you can ask in plain language, such as a device count, a room dimension, or which sheet holds a detail, and it answers cited to the exact sheet. It can run the takeoff for you, or guide an estimator through one step by step.
Can Quotr.ai replace STACK?
For teams that want AI-native takeoff, estimating, procurement, and a done-for-you option in one place, yes. Teams deeply standardized on STACK’s assembly library, plan management, or integrations should check workflow fit before switching.
About the author
By Xian Li, Cost Estimator at Quotr.ai. Xian estimates real construction projects on the platform day to day, so this comparison is written through an estimator’s lens: not which tool has the longest feature list, but which one actually gets a team to a bid-ready number and a buyout faster.
Last updated: October 12, 2026. Re-check both tools’ pricing and feature claims quarterly.
Sources
- STACK pricing, Dupple pricing overview and Capterra (checked Oct 2026; confirm on STACK’s site)
- STACK reviews, STACK Takeoff & Estimate on G2
