Praetorian is an Austin, Texas-based cybersecurity company that helps organizations prevent breaches by combining an adversarial, offensive-security mindset with automation and AI. Founded in 2010 by CEO Nathan Sportsman, the firm pairs elite red-team engineers with its flagship Chariot platform for Continuous Threat Exposure Management (CTEM) and attack surface management, plus services spanning penetration testing, cloud and product security, and adversarial emulation. Its clients include large technology, finance, healthcare, and automotive organizations, and it maintains open-source tools such as the Nosey Parker secrets scanner.
Salomon Serfati is the co-founder and CEO of Chariot, the New York fintech building payment rails for the $326 billion donor-advised fund market. Its flagship product, DAFpay, turned the clunky multi-step process of donating from a DAF into a three-click checkout button now live on over 100,000 nonprofit donation forms, from the American Cancer Society to GoFundMe, and was named one of TIME's Best Inventions of 2025. A University of Pennsylvania computer scientist and former BlackRock engineer who opened a separate 10%-of-income charity account with his first paycheck, Serfati turned a personal tithing habit into financial infrastructure for giving.