What is a itb?

An invitation to bid: the message a general contractor sends to a subcontractor or supplier asking for a price on a defined scope, with drawings, specifications and a due date. Bid management software sends ITBs, tracks who has opened and answered them, and keeps the responses for leveling.

Who uses one?

Subcontractors and general contractors managing bid invitations, bid leveling and preconstruction

What does it cost?

Pricing varies. The cheapest provider in our Top 11 starts around $299/mo. See the cheapest providers ranked.

How do I pick one?

Read the full methodology for our 9.4-point scoring framework, then look at the canonical Procore vs BuildingConnected vs PlanHub: 11 Best Construction Bid Management Software 2026. If you want a slice of the ranking by price, fit, or compliance, jump to: cheapest · highest-rated · fastest onboarding.

Source: Top 11 Procore vs BuildingConnected vs PlanHub: 11 Best Construction Bid Management Software 2026, verified October 12, 2026.