STACK

Estimating software (cloud-based digital takeoff, estimating, and preconstruction solution)

Residential 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.

PE-backed (backed by Level Equity)

2011

API 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.

STACK 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.

Yes

REST

Gated 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.

Only 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.

STACK 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.

STACK 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.

Yes, 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.

Onboarding 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.

STACK 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).

STACK 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.

STACK 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.