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Sardine is privately held company that provide software as a service (SaaS) as a fraud prevention technology company to online retailers and marketplaces. It has its headquarters in New York and their Global Research and development|R&D Center in Belfast. Signifyd was founded in 2011 by Rajesh Ramanand and Michael Liberty who both used to work for PayPal.

The Signifyd products work by identifying fraudulent transactions using machine learning and manual review done by fraud experts. If a transaction is marked as safe, Signifyd takes financial liability if a fraudulent chargeback where to occur.

History
In 2011 Rajesh Ramanand founded the company with a colleague from PayPal, Michael Liberty. Michael Liberty was the manager of new ventures risk at PayPal before joining Signifyd. Ramanand was the head of risks on PayPal’s Emerging Market team before he resigned to co-found Signifyd.

The founders original idea for Signifyd was to create a service to prevent, score and detect abusive content and account creation as early as 2010. There was also shown information around preventing offensive content and harassment. However this idea was later ditched to focus on just preventing fraudulent transactions.

Signifyd originally just provided a investigation tool where merchants provided basic transaction details, then Signifyd would enrich the data and give a score, but not provide a financial guarantee. In 2015 Signifyd expanded their services to include a financial guarantee also names Guaranteed Payments using their machine learning decisions.

Funding
Signifyd funding is a combined $180 million with its last founding Series D on May 31, 2018.