STACK costs $299 per user per month for Premium or $349 per user per month for Pro in 2026, billed annually on 12-month terms — about $3,588 or $4,188 per user per year. There's also a free plan limited to one active project a month and 50 measurements per project. AI takeoff starts at Premium; worksheet estimating, the STACK for Excel integration and the BNI cost library need Pro.
Below: what each STACK plan includes, what 1,300+ reviewers praise and complain about, and when a cheaper or broader tool makes more sense.
Key Takeaways
- STACK is a cloud-based takeoff and estimating platform best suited to mid-size commercial GCs with dedicated estimating staff who need fast, accurate digital quantity takeoffs.
- Paid plans are $299/user/month (Premium) and $349/user/month (Pro), billed annually: about $3,588–$4,188 per user per year, above average for the category.
- Users on G2 and Capterra (4.5/5 across 1,300+ reviews) praise STACK for takeoff speed and assembly library depth, but flag a learning curve and limited sub outreach tools.
- STACK's estimating module is solid but secondary to its takeoff strength — complex pricing workflows often require workarounds.
- GCs who need takeoff plus bid management and subcontractor outreach in one tool may find STACK incomplete on its own.
STACK Construction Technologies has been around since 2000 and has grown into one of the most recognized names in cloud-based preconstruction software. With over 1,300 verified user reviews and a 4.5/5 rating on Capterra, it's clearly doing something right.
But "popular" and "right for your team" are two different things.
This review covers what STACK actually does, what it costs in 2026, where it shines, where it falls short, and when you should look elsewhere. No affiliate spin — just a straight look at the platform.
What Is STACK Construction Software?
STACK is a cloud-based preconstruction platform built primarily around digital takeoff and estimating. It lets contractors upload digital plans, perform quantity takeoffs using measurement tools, and build out detailed estimates — all within a browser-based environment.
Unlike legacy desktop tools like PlanSwift or On-Screen Takeoff, STACK requires no installation. Every project lives in the cloud, which means your estimating team can work from anywhere and share plans in real time.
The platform serves commercial GCs, specialty subcontractors, and trade contractors across virtually every division — from concrete and framing to mechanical and electrical.
Core Features of STACK
Digital Plan Markup and Quantity Takeoff
STACK's strongest feature is its takeoff engine. Estimators upload PDF or image-based plans, calibrate scale, and then use linear, area, volume, and count tools to measure quantities directly on-screen.
The platform includes auto-count capabilities for repetitive items (doors, fixtures, symbols) and aerial imagery integration for sitework estimates. Reviewers on Capterra consistently rate STACK's takeoff speed and accuracy as its top attributes — 99% positive on that dimension across 80+ specific reviews.
Assembly Estimating
STACK's assembly library lets estimators build reusable cost assemblies: pre-configured combinations of materials, labor, and equipment that apply automatically when a takeoff item is added. For high-volume bidders working in repetitive project types, this cuts estimating time dramatically.
You can build a completely custom assembly library within the first week of use, which is a common workflow for specialty contractors who price the same scope types repeatedly.
Bid Management and Plan Management
STACK includes tools for tracking bid invitations and managing plan sets, including version control, markup collaboration, and document organization with auto-naming and OCR bookmarking.
The bid management module tracks bid status and generates bid comparison reports, though it functions more as an organizational layer than a full bid outreach and leveling system.
AI-Powered Features (Premium Tier)
STACK's Premium plan includes GPT-powered AI chat for understanding project details and AI-assisted autocount features for plan recognition — automating the identification and quantification of plan elements like walls, doors, and structural symbols.
These features are available only on the Premium tier and are positioned as time-savers for large or complex plan sets.
STACK Pricing in 2026
STACK publishes its prices on its pricing page. As of October 2026 there are three published plans plus a custom option:
| Plan | Price | What's Included |
|---|---|---|
| Free | $0 | 1 active project per month, up to 300 plan pages, 50 measurements per project, 1 viewer seat, core takeoff tools |
| Premium | $299/user/month, billed annually (~$3,588/yr) | Unlimited projects, pages and measurements; full takeoff toolset; item and assembly library; AI Takeoffs, STACK IQ, symbol search, version overlay |
| Pro | $349/user/month, billed annually (~$4,188/yr) | Everything in Premium plus worksheet estimating, STACK for Excel, estimate dashboard, regional BNI cost library, proposals, missing-material checks |
| Build Your Own | Custom quote | Custom package; ERP connectors are a paid add-on for Pro |
A few things worth noting on pricing:
The free plan is a trial in practice. One active project a month and 50 measurements per project won't carry a real bid schedule. New accounts also get 7 days of Pro features on any project.
AI takeoff starts at Premium, estimating at Pro. If you want STACK to price the work rather than just measure it, budget for Pro at $349 per user per month.
Every paid plan is a 12-month term. STACK lists annual prices only, and the discount for paying annually is quoted inconsistently on its own page (15% in the banner, 20% in the FAQ). Ask for the exact figure in writing.
According to GetApp analysis, some reviewers find the value clear when comparing against outsourced takeoff costs or other enterprise tools, while others — particularly small GCs or infrequent users — report that the annual fee is difficult to justify.
What Real Users Say: STACK Pros and Cons
Pros (from verified G2 and Capterra reviews)
Fast, accurate takeoffs. The most consistent praise across 1,300+ reviews is takeoff speed. Estimators report completing takeoffs in significantly less time than traditional methods — particularly on large plan sets where the cloud-based interface and layering tools shine.
Strong assembly library. The ability to build custom item and assembly libraries that carry across projects is a genuine productivity multiplier for contractors with repeating scope types.
Cloud collaboration. Because STACK is browser-based, multiple estimators can work on the same project simultaneously. No emailing PDF markups back and forth. No version conflicts.
Responsive customer support. STACK's customer service receives consistently high marks — 4.7/5 on Capterra — with users noting real human support and quick response times.
Frequent feature updates. STACK releases new features regularly and has been adding AI capabilities to the platform. Users who value a product that actively improves cite this as a reason they've stayed.
Cons (from verified reviews)
Price point is steep for small GCs. At roughly $3,588–$4,188/year per user, STACK is one of the more expensive options in the takeoff/estimating category. Small contractors and infrequent bidders often report the cost is hard to justify.
Learning curve. While STACK's layout is praised once learned, several reviewers flag a meaningful onboarding investment — particularly around building custom assemblies and setting up cost databases. Plan for several hours of training before hitting full productivity.
Estimating module less powerful than the takeoff. STACK's takeoff tools are class-leading. Its estimating workflows are functional but sometimes require workarounds for complex pricing structures, multi-vendor scenarios, or heavily customized proposals.
No built-in sub outreach. STACK doesn't have native subcontractor invitation, bid leveling, or sub network features. GCs managing sub bids still need to use separate tools (email threads, spreadsheets, or a dedicated bid management platform) alongside STACK.
Performance issues on large files. Several reviewers note that complex, multi-sheet plan sets can cause lag or slowdowns, particularly in older plans with high resolution.
STACK vs. Alternatives: Comparison Table
| Feature | STACK | PlanSwift | Bluebeam Revu | Struvia |
|---|---|---|---|---|
| Cloud-based | Yes | No (desktop) | Partial | Yes |
| AI takeoff | Yes (Premium and up) | Limited | Limited | Yes |
| Price | $3,588–$4,188/user/yr | $1,595 (one-time) / $1,749/yr subscription | $260–$440/user/yr | ~$45 per typical plan set, usage-billed |
| Sub management | Limited | None | None | Bid packages, sub outreach, leveling |
| Bid leveling | Basic | None | None | Automated |
| Assembly library | Strong | Strong | N/A | Built-in |
| Best for | Mid-size commercial GC | Cost-conscious sub | PDF markup/review | GCs needing takeoff + bid mgmt |
PlanSwift is a desktop-first option with a strong assembly library and a one-time license fee that many budget-conscious contractors prefer. It lacks cloud collaboration and has no sub management features.
Bluebeam Revu is fundamentally a PDF markup and review tool — excellent at plan review and collaboration, but not an estimating platform. It's PDF-first, not estimate-first.
Struvia approaches the problem differently: rather than providing a standalone takeoff tool, Struvia combines AI takeoff, a priced estimate from your own price book, and sub bid management: bid packages, outreach and leveling. It's billed per plan set, not per seat (about $45 for a typical set). It's purpose-built for GCs who need to go from plans to priced sub bids, not just quantities. You can read a full breakdown in our best construction estimating software guide for 2026.
Who STACK Is Best For
STACK makes the most sense for:
- Mid-size commercial GCs with a dedicated estimating department that handles high bid volume
- Trade contractors doing repetitive work types where a well-built assembly library provides compounding ROI
- Teams that collaborate remotely and need cloud-based plan access and markup
- Estimators who prioritize takeoff speed over sub outreach or bid management features
When to Consider an Alternative
STACK may not be the right fit if:
- You're a small GC where $3,588–$4,188/year per estimator is hard to justify against bid volume
- You need built-in sub outreach. STACK doesn't send bid invitations, track sub responses, or level competing bids. You'll need a separate system for that.
- Your estimating workflow is complex. STACK's estimating module can handle most scenarios, but it requires workarounds for sophisticated pricing structures.
- You want takeoff + bid management in one tool. A platform like Struvia handles AI takeoff, the priced estimate, sub invitations, bid collection and leveling without stitching two tools together. New accounts start with 600 free credits, so you can upload a plan set free and compare it with a STACK takeoff.
Frequently Asked Questions
How much does STACK cost?
STACK Premium is $299 per user per month and STACK Pro is $349 per user per month, both billed annually on a 12-month term, which works out to about $3,588 and $4,188 per user per year. A free plan covers one active project a month with 50 measurements per project, and a custom "Build Your Own" plan is quote-only.
Does STACK have a free version?
Yes. STACK's free plan includes one active project per month, up to 300 plan pages, 50 measurements per project, and core takeoff tools, plus 7 days of Pro features when you sign up. It's enough to test the takeoff workflow, not to run a bid schedule.
Is STACK construction software worth the price?
For high-volume commercial estimating teams, STACK generally justifies its cost through time savings on takeoff. For smaller GCs bidding fewer than 5–10 projects per month, the per-seat cost can be harder to recoup. Compare your current takeoff labor hours against the annual fee to determine ROI.
Does STACK work on Mac?
Yes. Because STACK is browser-based, it runs on any operating system with a modern browser — Mac, Windows, Chromebook, or tablet. There's nothing to install.
Can STACK send bid invitations to subcontractors?
STACK includes basic bid tracking features, but it does not have a native subcontractor network or bid invitation system. GCs that need to solicit, collect, and level sub bids typically use STACK alongside a separate bid management tool.
What trades is STACK best for?
STACK supports all trades that involve counting or measuring from digital plans — concrete, framing, MEP, finishes, sitework, and more. Specialty trades with high-volume repetitive work (roofing, drywall, electrical) tend to see the highest ROI through assembly library use.
How does STACK compare to Procore for estimating?
Procore is a full project management platform with estimating features; STACK is takeoff and estimating first. STACK is typically faster to deploy for pure preconstruction work and costs significantly less than a full Procore implementation for teams that only need takeoff and estimating.
Related Resources
- PlanSwift Alternatives in 2026: 7 Tools Estimators Are Switching To
- Best Construction Estimating Software 2026: Ranked by Real GCs
- STACK vs Procore Estimating: Which Tool Wins in 2026?
- 7 Best Construction Takeoff Software Tools in 2026
*Reviewed by Weston Burnett, Co-Founder and CTO of Struvia.*
