Maxymiser, a testing, optimization and personalization marketing technology vendor, has secured an investment of $12 million from Investor Growth Capital along with an additional investment of an undisclosed amount from the company’s Series A investor Pentech Ventures. Maxymiser, which did not reveal the investment total from Pentech, says it will use the funds to expand its business with emphasis on North America and research and development.

Maxymiser was founded in 2006 and initially focused on web testing systems for brands in Europe. It expanded to the U.S. in 2010. U.S. clients include Teleflora, The Finish Line Inc., HarperCollins, Time Warner Cable, and Harry and David Holdings Inc. The company has clients in retail, travel, financial services, media and online gaming. Maxymiser combines online testing and personalization into a single platform that enables marketers to launch optimized campaigns without the need for I.T. resources, the company says.

“We invest in companies that are leaders in fast-growing markets, and Maxymiser is a clear leader in customer experience optimization, something that has become a fundamental imperative for any company serious about e-commerce success,” says Noah Walley, head of technology investing at Investor Growth Capital. “In the course of our diligence process, we heard universal positive feedback from Maxymiser’s clients.”

Harry and David is No. 103 in the Internet Retailer Top 500 Guide. Finish Line is No. 174.