The Vendor Selection Matrix is a survey-based methodology for evaluating vendor performance in the Partner Management Automation software space. The top global vendors in 2021 are identified as iMPARTNER, IMPACT.COM, ZIFTSOLUTIONS, MAGNETRIX, WEBINFINITY, CHANNEL MECHANICS, Salesforce, CHANNELEXPERTS, CHANNELTIVITY, BRANDMAKER, COMPUTER MARKET RESEARCH, and SPROUTLOUD. The methodology takes into account factors such as strategy, market leadership, execution, and impact on the partner management process.