Although the Internet has made it easier for companies to transact business and transfer information, finding appropriate trading partners to do business with is still major stumbling block in business-to-business electronic commerce. To make this easier, the authors propose Matchmaker. Matchmaker features four main facilities. First, it embodies both supplier relationship management and customer relationship management. Second, when brokering merchants, it considers multiple attributes simultaneously and uses degree of fitness as an evaluation criterion. Third, it executes two-tiered qualifications, at the enterprise level (quotations) and the detail level (purchase orders). Finally, it can handle such processes as supply aggregation, supply segregation, demand aggregation, and demand segregation.