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41st Parameter: Patented device identification for fraud detection, cybercrime prevention, and risk-based authentication in financial services and e-commerce.
41st Parameter is a San Jose, California-based enterprise software company that develops patented device identification technology for fraud detection and risk-based authentication. The platform helps businesses recognize users across devices to prevent cybercrime in activities such as new account openings and card-not-present transactions while maintaining historical renewal rates of over 95 percent on its multi-year contracts. The company serves financial institutions, e-commerce merchants, and digital media organizations, including ad-tech clients like OpenX and PubMatic through its AdTruth brand. Prior to its acquisition, the company raised over $50 million in venture funding from lead investors such as Kleiner Perkins Caufield & Byers and Norwest Venture Partners. In October 2013, global information services group Experian acquired the business for $324 million, at which time the company was generating an approximate $26 million annual revenue run rate. 41st Parameter was founded in 2004 by Ori Eisen.
41st Parameter has raised $38.0M across 4 funding rounds.
41st Parameter has raised $38.0M in total across 4 funding rounds.
41st Parameter has raised $38.0M in total across 4 funding rounds.
41st Parameter's investors include Ballistic Ventures, G2VP, George Still, Justin LaFayette, Jafco Ventures, Kleiner Perkins, Norwest Venture Partners.
41st Parameter was a technology company specializing in patented device identification and fingerprinting technology for web fraud detection and risk-based authentication. It built solutions that analyzed device data to detect fraudulent activities like new account fraud, card-not-present (CNP) transactions, and account takeovers, serving financial institutions, eCommerce merchants, online travel providers, and digital media organizations.[1][2][4] The company reduced fraud losses while minimizing false positives—incorrect fraud flags that frustrate customers and hurt sales—enabling secure, efficient online interactions across devices.[1][2] Founded in 2004 with offices in Silicon Valley, Arizona, UK, and Tokyo, it was acquired by Experian in 2013 (with some references noting integration aspects up to 2018), becoming part of Experian's FraudNet platform, which screens billions of fraud events annually.[1][2][3][5]
41st Parameter was founded in 2004 by Ori Eisen, who served as Chairman and emphasized superior device intelligence to differentiate from other cybersecurity tools.[1][2] The idea emerged amid rising online fraud challenges as consumers shifted to internet-connected devices for banking, shopping, and media, creating needs for better authentication beyond traditional methods.[1][2] Early traction came from its patented technology for device-based risk assessment, attracting leading global clients in finance and eCommerce. A pivotal moment was the 2013 acquisition by Experian, which integrated its capabilities into a larger fraud prevention ecosystem, with ongoing developments like the 2025 launch of an integrated cross-channel platform combining Precise ID with FraudNet.[2][3]
41st Parameter rode the explosion of multi-device online interactions and cyber threats in the 2000s-2010s, addressing gaps in traditional authentication amid eCommerce growth and CNP fraud surges.[1][2] Its timing aligned with regulatory pressures and the shift to digital banking/shopping, where fraud prevention became critical for trust and revenue. Market forces like increasing device diversity and sophisticated attacks favored its device-centric approach, influencing the ecosystem by setting standards for intelligence-driven security—now amplified through Experian's global scale, powering tools for millions of clients and enhancing industry-wide fraud platforms.[3][4] It helped pioneer reduced-friction security, impacting sectors from finance (e.g., U.S. Bank) to telecom (e.g., Altice USA).[6]
Post-acquisition, 41st Parameter's technology endures within Experian's FraudNet, with recent integrations like the mid-2025 cross-channel platform signaling sustained evolution amid rising AI-driven threats.[3] Next steps likely involve deeper AI enhancements for real-time, adaptive detection, capitalizing on trends like zero-trust architectures and regulatory demands for privacy-compliant biometrics. Its influence may grow by enabling seamless digital economies, reducing global fraud losses while preserving user trust—echoing its founding vision of superior device intelligence in an ever-connected world.[1][2]
41st Parameter has raised $38.0M across 4 funding rounds. Most recently, it raised $13.0M Series D in April 2012.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Apr 1, 2012 | $13.0M Series D | Ballistic Ventures, G2VP, George Still, Justin LaFayette, Jafco Ventures, Kleiner Perkins, Norwest Venture Partners | |
| Aug 1, 2007 | $10.0M Series C | Ballistic Ventures, G2VP, George Still | |
| May 1, 2006 | $11.0M Series B | Ballistic Ventures, G2VP, George Still | |
| May 1, 2005 | $4.0M Series A | George Still |