Freedom251 › Project Estimation Software
STACK
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 1 active project per month · Up to 300 plan pages · 50 measurements per project · 1 viewer seat | Free |
| Premium | Unlimited projects · Unlimited plan pages · Unlimited measurements · Unlimited viewer seats | On request |
| Pro | Unlimited projects · Unlimited plan pages · Unlimited measurements · Unlimited viewer seats | On request |
| Takeoff & Estimate | flat rate per year · Quantity, labor and material takeoff · Flexible estimates and proposals · Unlimited plans and projects · Unlimited reviewer users · API integration | $2,599 a year |
| Takeoff & Estimate | per user / month · Quantity, labor and material takeoff · Flexible estimates and proposals · Unlimited plans and projects | $299 a month |
| Full STACK Platform | per user / month · Plan measurement and markup · Integrated estimating · Field and project management | $348 a month |
| Build & Operate | per user / month · Responsive plan viewing and markup · Issues, punch lists and daily reports · Customizable workflows | $49 a month |
| Build & Operate | flat rate per year · Responsive plan viewing and markup · Issues, punch lists and daily reports · Customizable workflows | $599 a year |
As stackct.com lists them, read 21 Sept 2026. The maker's own page has the final word.
Facts from STACK's own pages
- Acquisition
- Crunchbase records STACK's acquisition of SmartUse as one acquisition. · crunchbase.com, 15 Oct 2026
- API
- STACK offers a public partner API for moving plans and documents into STACK and sending estimate data to accounting or project-management systems. · stackct.com, 15 Oct 2026
- 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. · stackct.com, 15 Oct 2026
- Browser performance limits
- STACK recommends Chrome, Firefox or Safari and at least 15 Mbps download and 3 Mbps upload, with 20/5 Mbps recommended. · support.stackct.com, 15 Oct 2026
- Build plans
- Build & Operate Essential includes plan and document management, markups, measurements, issues, version comparison, offline use and role-based folder security. · support.stackct.com, 15 Oct 2026
- Company headquarters
- The company is headquartered in Cincinnati, Ohio, United States. · crunchbase.com, 15 Oct 2026
- Company legal name
- Crunchbase lists the legal name as STACK Construction Technologies, Inc. · crunchbase.com, 15 Oct 2026
- Company size
- Crunchbase places STACK in the 101–250 employee range. · crunchbase.com, 15 Oct 2026
- Developer documentation
- Developer documentation covers authentication, sandbox testing, certification, production deployment, branding and support. · stackct.com, 15 Oct 2026
- Enterprise controls
- The Enterprise Build & Operate tier adds unlimited reviewer users, API integration and single sign-on. · support.stackct.com, 15 Oct 2026
- Estimating
- Quantities flow into live estimates with item and assembly libraries, proposals and AI checks for pricing risk. · stackct.com, 15 Oct 2026
- Evaluate
- The platform uploads plans and specifications, auto-names sheets and flags revisions with AI assistance. · stackct.com, 15 Oct 2026
- Field app
- The mobile field application supports plan viewing, markups, issues, photos, daily reports and workflows. · stackct.com, 15 Oct 2026
- Founded
- Capterra identifies Stack Construction Technologies as founded in 2011. · capterra.ca, 15 Oct 2026
- Headquarters
- Cincinnati, Ohio, USA · stackct.com, 23 Sept 2026
- Integrations
- The partner ecosystem includes CRM, ERP, accounting and construction technology connections, with named partners such as Procore, QuickBooks, Autodesk and Acumatica. · stackct.com, 15 Oct 2026
- Limit: document access
- Some reviewers report outdated documents or difficulty viewing drawings offline despite the product's offline-sync design. · getapp.com, 15 Oct 2026
- Limit: navigation and bugs
- Independent reviews mention difficult navigation, occasional bugs, document-upload friction and time-consuming updates. · capterra.com, 15 Oct 2026
- Limit: performance
- Users report lag or slow performance when internet quality is poor or drawing sets are very large. · softwareadvice.com, 15 Oct 2026
- Limit: pricing
- Reviewers cite high or rigid pricing, annual increases and a desire for more flexible tiered or multi-year discounts. · capterra.com, 15 Oct 2026
- Offline mode
- The Field App can synchronize work completed without connectivity after an internet connection returns. · stackct.com, 15 Oct 2026
- 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. · crunchbase.com, 15 Oct 2026
- Plan comparison
- STACK provides overlay and side-by-side comparison of drawing versions. · stackct.com, 15 Oct 2026
- Praise: takeoff and estimating
- Review analysis highlights faster, more accurate takeoffs, integrated estimating and time savings as recurring benefits. · softwareadvice.com, 15 Oct 2026
Where STACK stands on Freedom251
- Project Estimation Software#2 of 27
- Construction Estimating Software#5 of 29
- Construction Takeoff Software#5 of 25