Our humble history began in 1931 by publishing a pricing book for electrical contractors that would eventually be named the Biddle Book.  Since then we expanded into multiple industries and grew from a simple publishing company into a complete source of business data for contractors, distributors and manufacturers alike.  Our 20,000+ customers rely on one or more of our products daily.

We offer pricing for electrical and plumbing estimating systems, dealer and distributor data for ERP systems, services to help build e-commerce sites, software for creating submittals, advertising and analytics for manufacturers, and can build custom content for just about any business application available.

The backbone of our products stem from the databases built from manufacturer-provided information that our team of content experts clean and standardize.  When you receive the information, it is uniform and accurate which keeps your business systems flowing smoothly.

Trimble, our parent company since 2013, is leveraging Trade Service expertise to inject many of their Design-Build-Operate (DBO) technologies with our trusted data.