Sub-Hub is an online communication service geared for the bidding phase of construction. Sub-Hub's Bid Notification Service allows general contractors to efficiently bid. And the Job Notification Service provides subcontractors an easy way to find their next job. Sub-Hub is fully integrated with the eTakeoff Plan Viewer.

The Blue Book has been connecting buyers and sellers in the construction industry since 1913, providing a comprehensive database of general contractors, subcontractors and suppliers. With printed regional directories and online access 24/7 at thebluebook.com, The Blue Book offers one source for locating vendors.
BB-Bid, the company’s free online bid management system allows users to quickly and easily message their private vendors, as well as those in The Blue Book database. BB-Bid is fully integrated with the eTakeoff Plan Viewer.

BidTool is the leader in on demand construction relationship management, BidTool.net empowers you to find and bid work quickly and efficiently.

4Clicks-Solutions, LLC develops a comprehensive and complete suite of estimating and project management software. They specialize in custom software solutions for the government contract method known as Job order contracting. The eTakeoff Plan Viewer is fully integrated with their e4Clicks Project Estimator.

iSqFt is a premier provider of online preconstruction management services. Their Internet Plan Room™ provides subcontractors, suppliers, and professional estimators with around-the-clock access to project information, plans, specs and addenda for publicly bidding construction projects. It is fully integrated with the eTakeoff Plan Viewer.