ctem
(8)
The Company Betting That Scanning Was Never the Hard Part
Every enterprise already owns a dozen scanners that find problems. Nucleus Security built a business on the boring, unglamorous job nobody else wanted: figuring out which of the millions of findings actually matter.
Praetorian
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.
Rescana
Rescana is a cybersecurity company that builds autonomous, AI-agent-driven third-party risk management (TPRM) and external attack surface management software. Its platform discovers, classifies, assesses, monitors, and helps remediate risk across a company's vendor ecosystem - including vendors with no web presence - using agentic AI and open-source intelligence (OSINT). Founded by Guy Halfon and based between New York and Tel Aviv, Rescana targets regulated, vendor-heavy industries such as banking, telecom, healthcare, real estate and government, promising vendor-risk oversight that scales without a proportional increase in security headcount.
Guy Halfon
Guy Halfon is the co-founder and CEO of Rescana, a Tel Aviv and New York based cybersecurity company building autonomous, agent-based third-party risk management. After years running security for global gaming operator Playtech and founding boutique security consultancies, he started Rescana in 2016 to connect cyber risk to business decisions. The company now uses teams of AI agents to discover, classify and assess vendors and continuously map external attack surfaces at enterprise scale, including its no-code Vega platform.
Rahul Tyagi
Rahul Tyagi is Co-Founder of Safe Security (formerly Lucideus), the Palo Alto-based Autonomous Cyber Risk Management platform that processes over three billion signals daily. A Certified Ethical Hacker who graduated from Lovely Professional University in 2011, he co-founded the company at IIT Bombay in 2012 alongside Saket Modi and Vidit Baxi. He has spent over a decade pioneering cyber risk quantification - using FAIR model frameworks and MITRE ATT&CK integration to give Fortune 500 boards a dollar figure on their digital exposure. Featured in Fortune India's 40-under-40, he discovered vulnerabilities in Intel, Sony, HP, TED, and dozens more before pivoting from pen-testing to platform. His most recent chapter: leading Safe Security's CyberAGI vision after closing a $70M Series C in July 2025.
Saket Modi
Saket Modi is the Co-Founder and CEO of Safe Security (formerly Lucideus), the AI-native cyber risk management platform he started building in his final year of engineering in 2012. Based in Palo Alto, he has grown Safe Security from a bootstrapped IIT Bombay-incubated startup into a 1,300-person company with over $200M in funding — backed by Cisco's legendary John Chambers — protecting the digital infrastructure of Fortune 500 companies worldwide. His audacious goal: build CyberAGI, the definitive autonomous system of intelligence and action for the modern CISO.
Picus Security
Picus Security is the cybersecurity company behind the Picus Security Validation Platform - an Adversarial Exposure Validation system that continuously simulates real-world attacks against an organization's defenses to expose which ones actually work. Founded in 2013 by three Turkish mathematicians and now headquartered in San Francisco, Picus serves 500+ enterprise customers including Mastercard and is the official Exposure Validation Partner of Juventus.
Safe Security
Safe Security is a Palo Alto-based cybersecurity company building an Agentic AI-native platform for cyber risk quantification (CRQ), third-party risk management (TPRM) and continuous threat exposure management (CTEM). Founded in 2012 in India as Lucideus, it now translates security posture into dollars-and-cents risk for enterprises like Google, Chevron, T-Mobile, Fidelity and IHG, and is pursuing what its founders call 'CyberAGI'.