Signifyd launched in 2011 to mitigate e-commerce chargebacks and this week landed $56 million to continue the fight. The Series C round, which brings the company’s total capital to $87 million, was led by Bain Capital Ventures with contributions from Menlo Ventures, American Express, and other existing investors.

The company will use the funds to expand its team of engineers and fraud experts. Specifically, Signifyd plans to double its current engineering team over the course of the next year. Signifyd will also scale its fraud protection technology to serve enterprise merchants in the U.S., Europe, and Asia. This will continue an already impressive growth curve. The company now protects 5,000 merchants and in the past year experienced a 20x growth in transaction volume, 4.5x YOY revenue growth, and increased its workforce to more than 100. This 50% increase in employees from the year prior prompted the expansion to a new office to accommodate the growth.

Signifyd’s Guaranteed Fraud Protection, which it debuted at FinovateSpring 2013, helps shift fraud liability away from online retailers by offering a 100% guarantee against fraud or chargebacks on every order. The company stands behind its technology by reimbursing clients for “any fraudulent transactions that slip through the cracks.” Enabling technologies such as machine learning and AI offer a scalable approach that can be implemented with large, enterprise retailers.

Among Signifyd’s recent partnerships are Salesforce Commerce Cloud, Magento, Accertify, and ThreatMetrix. The company has received multiple honors recently, including multiple wins in the American Business Awards earlier this week. It has also been recognized by Entrepreneur, Forbes, and Bloomberg, and has been named one of the Bay Area’s Best Places to Work by the San Francisco Business Times and Silicon Valley Business Journal.