Certify and Chrome River Technologies, two providers of travel, expense and invoice management software, are merging in a transaction valued at over $1 billion. The combination creates what the companies call the industry’s most comprehensive suite of products for monitoring, managing and analyzing corporate spend. K1 Investment Management will hold a majority stake in the combined organization, while existing shareholders, including the companies’ founders and Bain Capital Ventures, a private investment firm based in Boston, will retain a minority interest. Initially, Certify and Chrome River will operate independently, with separate management teams focused on support for their existing products. The companies will support all existing products and collaborate on accelerating investments in technology areas such as machine learning, artificial intelligence, analytics and reporting, to provide customers with enhanced travel, expense, and invoice management capabilities. The merger joins Chrome River to the existing Certify family of travel, expense and invoice management brands that includes Nexonia, Tallie, Abacus, and Captio.