A tool for General Contractor estimators to compare subcontractor bids faster and smarter during preconstruction.

STACK Construction Technologies makes cloud-based preconstruction software for on-screen takeoff and estimating used by contractors across most trades. STACK does expose a real, documented REST API (v2), but access is gated - you must be a STACK customer on an API-Enabled Subscription (or an approved partner) to obtain credentials.

BuildingConnected is a preconstruction and bid-management platform for the commercial construction industry, now part of Autodesk Construction Cloud. Its products — Bid Board Pro for general contractors and subcontractors, and TradeTapp for subcontractor risk qualification — help teams send, track, and manage bid invitations across the largest…

Bobyard is an AI takeoff and estimating software company for the construction industry. Its platform reads construction drawings and blueprints to automatically extract quantities and organize takeoffs, cutting manual estimation work by 50-90% for trade contractors in landscaping, electrical, plumbing, mechanical, and finishes.

Planera is a modern construction scheduling platform for builders and general contractors, purpose-built around the Critical Path Method (CPM). It lets teams build, manage, and optimize project schedules through a visual, collaborative interface with drag-and-drop editing, a digital whiteboard (Canvas), Gantt views, DCMA quality checks, resource…

Ediphi is a cloud-native preconstruction platform for commercial construction contractors that unifies estimating, cost modeling, general conditions and general requirements (GCs & GRs) tracking, bid-package contracting, and a shared cloud unit-price catalog in one real-time collaborative workspace.

Muro AI is an early-stage construction-technology startup building PrecOS, a pre-construction operating system marketed as a pre-con manager's AI assistant that carries general contractors from scoping through handover.

Plan0 AI is a real estate construction technology company that applies AI to preconstruction cost estimation and design analysis. Its platform turns architectural drawings into detailed cost estimates and 3D models in roughly 30 minutes rather than the traditional two-week cycle, and adds automated takeoff and pricing, value-engineering scenario…