STACK

What it is

Category DescEstimating software (cloud-based digital takeoff, estimating, and preconstruction solution) ↗

Target UserResidential and commercial construction contractors, including general contractors, home builders, suppliers, and trade subcontractors across diverse specialties (e.g., concrete, drywall, electrical, roofing, plumbing, HVAC, painting, masonry); primarily serves small-to-midsize businesses while scaling to enterprise firms. ↗

OwnershipPE-backed (backed by Level Equity) ↗

Founded Year2011 ↗

Pricing & cost

Pricing ModelSTACK uses a tiered, per-user subscription model billed annually or monthly. Public list pricing is available for standard tiers, while custom enterprise subscriptions ('Build Your Own') are quote-only. ↗

Typical CostTakeoff & Estimate Premium costs $249/user/month ($2,988/year) billed annually, and Pro costs $299/user/month ($3,588/year) billed annually. Single-user Takeoff & Estimate starts at $2,999/year, dropping to $2,599/user/year for 2 users and $2,199/user/year for 3 or more users. Build & Operate plans start at $599/user/year (Essential) and $699/user/year (Pro). A 7-day limited free trial/account is also offered. ↗

Api Or Integration FeesAPI access is excluded from free accounts and restricted to paid subscription tiers. Additional modules (such as FloorPlan AI accelerators and select third-party integrations) are charged as paid add-on subscriptions, though standalone API pricing figures are quote-only and not publicly published. ↗

Implementation CostSTACK charges a one-time onboarding fee for customer setup and implementation, though the exact dollar figure is quote-only and not listed on public pricing cards. ↗

API & data access

Has ApiYes ↗

Api TypeREST ↗

Api Access GatingGated behind paid STACK plans with an API-enabled subscription or an approved Partner Account. API access is not available on free tier accounts and requires submitting an access request followed by an API kick-off call with the STACK integration team. ↗

Api LimitationsOnly published endpoints in the STACK Developers Reference are officially supported (unsupported endpoints are used at customer risk). The API requires OAuth 2.0 authentication and is not included in free accounts. Public documentation does not disclose explicit rate limits or custom-field caps. ↗

Data Export OptionsReports and estimate data can be exported to Excel (.xlsx) and CSV formats; marked-up plans and construction documents can be downloaded as PDF files; live bid data integration into spreadsheets is supported via the 'STACK for Excel' (Velixo) plugin. ↗

Native AI features

Ai Features SummarySTACK Construction Technologies offers native AI capabilities tailored to preconstruction, quantity takeoff, and construction document management. Key native AI features include 'Floor Plan AI' (shipped/GA as a paid add-on, initially announced in April 2024 in partnership with Workpack), which provides automated area/linear measurements and AI symbol auto-counting for items like fixtures, doors, and walls. Additionally, STACK offers 'STACK Assist' (announced in early 2024 and GA as part of the 'AI Accelerated' tier), an AI plan set chat assistant that answers project questions from text on uploaded drawings. STACK has no native AI features for dispatching, call handling, or financial AP/AR invoicing, nor does it maintain an MCP server. ↗

Ai DispatchSTACK does not offer native AI-powered dispatching or scheduling features. The software focuses on preconstruction takeoff, estimating, proposal generation, and plan/field document management rather than field dispatch operations. ↗

Ai FinanceSTACK does not offer native AI invoicing or AP/AR finance automation. The platform provides custom estimating worksheets and proposal creation, and integrates with accounting software like Acumatica or Excel integrations via Velixo, but lacks native AI accounting automation. ↗

Ai Assistant Or McpSTACK includes 'STACK Assist' (announced in April 2024, GA in its 'AI Accelerated' tier), a native AI chat assistant embedded directly in project plan sets. Estimators can ask natural-language questions about framing, wall types, insulation R-values, or fire ratings, and STACK Assist extracts verifiable text answers from uploaded plan sheets. STACK does not provide an MCP (Model Context Protocol) server. ↗

Integrations & ecosystem

Accounting IntegrationsSTACK connects to accounting and ERP platforms including QuickBooks Online, QuickBooks Desktop, Sage Intacct, Sage 300 CRE, and Acumatica Cloud ERP. For field and project management (PM), it connects with systems such as Procore, Autodesk Construction Cloud, BidCentral, and TopBuilder. Key accounting and field connections (including QuickBooks Online/Desktop, Sage Intacct, Acumatica, and Procore) are native direct integrations built by STACK, while additional system connections are available via third-party partners (such as Accordant, SWK Technologies, and TopBuilder) or open REST APIs. ↗

MarketplaceSTACK maintains a public partner marketplace and directory titled 'Partners & Integrations' on its website. The directory categorizes Integration Partners, Technology Partners, and Value Added Resellers (VARs), and STACK offers a developer program with API access for building third-party partner integrations. ↗

Unified Api SupportYes, Agave API (a unified API platform designed for the construction industry) supports integration with STACK to sync project and preconstruction data across ERPs and field applications. Standard multi-category unified API platforms like Merge.dev do not explicitly offer a STACK connector. ↗

Accounting fit & implementation

Certified PayrollSTACK does not natively support certified payroll or prevailing wage compliance reporting. Because STACK is a cloud-based takeoff, estimating, and preconstruction management solution rather than a payroll or ERP system, contractors must rely on integrations with third-party accounting/ERP or payroll systems (such as Sage Intacct or Acumatica) to process certified payroll and generate WH-347 reports. ↗

Accounting MethodSTACK is not a general ledger accounting system and does not directly support or execute accounting methods (neither accrual nor cash-based accounting). General ledger tracking and financial accounting functions are handled by integrating STACK with external accounting software like QuickBooks Online, Sage Intacct, or Acumatica. ↗

Wip Poc SupportSTACK does not natively generate WIP (Work in Progress) schedules or Percentage of Completion (POC) financial reporting. These revenue recognition and job-cost accounting reports are offloaded to connected construction accounting/ERP platforms. ↗

Implementation TimeOnboarding and time-to-value for STACK typically take from a few hours to a few days for individual estimators to get up and running, with team-wide adoption and template configuration usually taking one to a few weeks. ↗

Requires ImplementerNo, STACK does not usually require a paid third-party implementer or Value-Added Reseller (VAR). STACK provides direct customer onboarding, custom training, and support through its in-house customer success team, though VAR partners (such as Accordant) are available for complex enterprise ERP integrations. ↗

Adoption & market position

Market PositionSTACK Construction Technologies is a leading cloud-based preconstruction and construction software platform, catering primarily to trade subcontractors, general contractors, suppliers, and manufacturers. Its core offering centers on digital plan takeoff, estimating, bid management, and jobsite field collaboration. Private equity-backed by Level Equity (which doubled its investment in 2022, bringing total funding to ~$29.3M), STACK generates an estimated ~$31.8M in annual recurring revenue. The company has aggressively expanded its suite through strategic acquisitions, including SmartUse (2021), Bid Retriever (2022), and K-Ops (2022). ↗

Customer ScaleSTACK serves thousands of contractor organizations across North America and Australia. Company metrics report over 30,000 active users performing plan measurements across 430,000+ projects and estimating over $500 billion worth of construction work annually. Industry review trackers log over 3,700 verified customer reviews and reference ratings. ↗

MomentumSTACK exhibits strong upward momentum as a modern, 100% cloud-based SaaS platform. It is positioned as a modern replacement that trade contractors migrate to when adopting web-based workflows or moving away from legacy desktop-bound takeoff tools (such as PlanSwift or On-Screen Takeoff) and paper spreadsheets. STACK has landed on the Inc. 5000 list of fastest-growing private companies in the U.S. for six consecutive years and continues to scale up-market into enterprise subcontractor segments. ↗