Our Strength Members Enjoy A Competitive Business Edge Learn More ProSource Vendor Partners The Industry’s Best Brands. Period. See our brands. World Class Peer-to-Peer Interaction Learn more Strategic Alliances Learn about CI EDGE Learn about GPG Get empowered for success! Why Join. To join or learn more, fill out an interest form VENDORS See our brands. MEMBERS Get to know our members. Alliances Learn about CI Edge. Learn about GPG. Join Why join.