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STACK

stackct.com

From $49/mo Free plan WebWindowsiOSAndroidAPI
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Spec score 8.8 #4 of 27 in Project Estimation Software

What it is

STACK is project software for working with plan pages, measurements and cost estimation. Its Free plan supports one active project per month, up to 300 plan pages, 50 measurements per project and one viewer seat. Premium and Pro list unlimited projects, plan pages, measurements and viewer seats, though neither plan has a listed price. STACK is freemium, with a free plan at free and a 7-day trial. It is available on Android, iOS, web and Windows. The company was founded in 2011 and is headquartered in Cincinnati, Ohio, USA. The listed plan details make the free tier’s project, page, measurement and seat allowances explicit; the two paid tiers specify the same unlimited allowances for those categories. Cost estimation is also listed as a capability.

Spec sheet

What it does
STACK is cloud construction software covering plan evaluation, digital takeoff, estimating, bid management, field collaboration and project closeout.Read 15 Oct 2026 · stackct.com
API
STACK offers a public partner API for moving plans and documents into STACK and sending estimate data to accounting or project-management systems.Read 15 Oct 2026 · stackct.com
Integrations
The partner ecosystem includes CRM, ERP, accounting and construction technology connections, with named partners such as Procore, QuickBooks, Autodesk and Acumatica.Read 15 Oct 2026 · stackct.com
Security
STACK states that its cloud platform is SOC 2 compliant and uses industry-standard encryption, secure storage and continuous monitoring.Read 15 Oct 2026 · stackct.com
Support
Customers receive help-center content, webinars, in-app chat, phone and email account-manager support.Read 15 Oct 2026 · stackct.com
Headquarters
Cincinnati, Ohio, USARead 23 Sep 2026 · stackct.com
Founded
Capterra identifies Stack Construction Technologies as founded in 2011.Read 15 Oct 2026 · capterra.ca
Acquisition
Crunchbase records STACK's acquisition of SmartUse as one acquisition.Read 15 Oct 2026 · crunchbase.com
API access conditions
API use requires a customer subscription with API enabled, a partner account and approval; STACK says it responds to access requests within two business days.Read 15 Oct 2026 · stackct.com
Browser performance limits
STACK recommends Chrome, Firefox or Safari and at least 15 Mbps download and 3 Mbps upload, with 20/5 Mbps recommended.Read 15 Oct 2026 · support.stackct.com
Build plans
Build & Operate Essential includes plan and document management, markups, measurements, issues, version comparison, offline use and role-based folder security.Read 15 Oct 2026 · support.stackct.com
Company headquarters
The company is headquartered in Cincinnati, Ohio, United States.Read 15 Oct 2026 · crunchbase.com
Company legal name
Crunchbase lists the legal name as STACK Construction Technologies, Inc.Read 15 Oct 2026 · crunchbase.com
Company size
Crunchbase places STACK in the 101–250 employee range.Read 15 Oct 2026 · crunchbase.com
Developer documentation
Developer documentation covers authentication, sandbox testing, certification, production deployment, branding and support.Read 15 Oct 2026 · stackct.com
Enterprise controls
The Enterprise Build & Operate tier adds unlimited reviewer users, API integration and single sign-on.Read 15 Oct 2026 · support.stackct.com
Estimating
Quantities flow into live estimates with item and assembly libraries, proposals and AI checks for pricing risk.Read 15 Oct 2026 · stackct.com
Evaluate
The platform uploads plans and specifications, auto-names sheets and flags revisions with AI assistance.Read 15 Oct 2026 · stackct.com
Field app
The mobile field application supports plan viewing, markups, issues, photos, daily reports and workflows.Read 15 Oct 2026 · stackct.com
Limit: document access
Some reviewers report outdated documents or difficulty viewing drawings offline despite the product's offline-sync design.Read 15 Oct 2026 · getapp.com
Limit: navigation and bugs
Independent reviews mention difficult navigation, occasional bugs, document-upload friction and time-consuming updates.Read 15 Oct 2026 · capterra.com
Limit: performance
Users report lag or slow performance when internet quality is poor or drawing sets are very large.Read 15 Oct 2026 · softwareadvice.com
Limit: pricing
Reviewers cite high or rigid pricing, annual increases and a desire for more flexible tiered or multi-year discounts.Read 15 Oct 2026 · capterra.com
Offline mode
The Field App can synchronize work completed without connectivity after an internet connection returns.Read 15 Oct 2026 · stackct.com
Ownership and funding
Crunchbase classifies STACK as a private venture-backed company with five funding rounds and lists Level Equity Management and CincyTech among its investors.Read 15 Oct 2026 · crunchbase.com
Plan comparison
STACK provides overlay and side-by-side comparison of drawing versions.Read 15 Oct 2026 · stackct.com
Praise: takeoff and estimating
Review analysis highlights faster, more accurate takeoffs, integrated estimating and time savings as recurring benefits.Read 15 Oct 2026 · softwareadvice.com
Praise: usability and support
Independent reviewers repeatedly describe STACK as intuitive or easy to learn and praise responsive customer support.Read 15 Oct 2026 · getapp.com
Rating on Capterra
4.5 out of 5 from 1,399 reviewsRead 15 Oct 2026 · capterra.com
Rating on G2
4.0 out of 5 from 3 reviewsRead 15 Oct 2026 · g2.com
Rating on GetApp
4.4 out of 5 from 95 reviewsRead 15 Oct 2026 · getapp.com
Rating on Software Advice
4.5 out of 5 from 1,399 reviewsRead 15 Oct 2026 · softwareadvice.com
Rating on Trustpilot
2.3 out of 5 from 6 reviewsRead 15 Oct 2026 · trustpilot.com
Rating on TrustRadius
10 out of 10 from 1 reviewRead 15 Oct 2026 · trustradius.com
System requirements
The iOS app requires iOS 15 or later, Android requires Android 9 or later, and the Windows app supports Windows 8, 10 and 11 with .NET Framework 4.8 or newer.Read 15 Oct 2026 · support.stackct.com
Takeoff
Users can measure linear, area, count and volume quantities and use AI symbol counting and scope suggestions.Read 15 Oct 2026 · stackct.com

Plans and prices

Free Free 1 active project per month · Up to 300 plan pages · 50 measurements per project · 1 viewer seat Read 21 Sep 2026 · stackct.com
Premium Priced on request Unlimited projects · Unlimited plan pages · Unlimited measurements · Unlimited viewer seats Read 21 Sep 2026 · stackct.com
Pro Priced on request Unlimited projects · Unlimited plan pages · Unlimited measurements · Unlimited viewer seats Read 21 Sep 2026 · stackct.com
Build & Operate $49 a month per user / month Responsive plan viewing and markup · Issues, punch lists and daily reports · Customizable workflows Read 15 Oct 2026 · stackct.com
Takeoff & Estimate $299 a month per user / month Quantity, labor and material takeoff · Flexible estimates and proposals · Unlimited plans and projects Read 15 Oct 2026 · stackct.com
Full STACK Platform $348 a month per user / month Plan measurement and markup · Integrated estimating · Field and project management Read 15 Oct 2026 · stackct.com
Build & Operate $599 a year flat rate per year Responsive plan viewing and markup · Issues, punch lists and daily reports · Customizable workflows Read 15 Oct 2026 · capterra.com
Takeoff & Estimate $2,599 a year flat rate per year Quantity, labor and material takeoff · Flexible estimates and proposals · Unlimited plans and projects · Unlimited reviewer users · API integration Read 15 Oct 2026 · capterra.com

Every STACK plan and price →

Strong points and limits

Strong points

  • Includes cost estimation.
  • Free plan costs nothing.
  • Available on Android, iOS, web and Windows.
  • Premium and Pro list unlimited projects and measurements.

Limits

  • Free plan allows one active project per month.
  • Free plan limits plan pages to 300.
  • Free plan allows 50 measurements per project.

Who it suits

STACK may suit people who need project plans, measurements and cost estimation. The Free plan has stated project and viewer limits, while Premium and Pro list unlimited allowances in those categories.

Verdict

STACK sets clear limits for its Free plan and lists unlimited capacity in the same categories for Premium and Pro. Buyers will need to ask about the paid-tier prices to compare costs.

Where Specifiction places it

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