Sublime Security

Sublime Security is pioneering the next generation of email security with its adaptive, AI-powered cloud platform that combines best-in-class threat detection with unprecedented visibility and control. Founded in 2019 by Josh Kamdjou and Ian Thiel, the company emerged from deep offensive cybersecurity experience - Josh spent 10 years in DoD and private sector red teaming where phishing was consistently the fastest way to gain network access, inspiring him to build a product that would stop attackers like himself.

Sublime's platform revolutionizes email security through two groundbreaking autonomous AI agents: the Autonomous Security Analyst (ASA) that investigates and triages threats in seconds, and the Autonomous Detection Engineer (ADÉ) that deploys new, tailored defenses to combat novel threats in hours instead of weeks. Built on a detection-as-code philosophy with MQL (Message Query Language), the platform empowers security teams to write custom detection rules, backtest against historical data, and deploy protections with precision and speed that legacy vendors cannot match.

With over $240 million in funding including a $150 million Series C in November 2025, Sublime has achieved remarkable growth - 100% ARR growth in first half of 2025 and 100% enterprise customer retention since inception. The company serves leading organizations including Spotify, Snowflake, Zscaler, Anduril, SentinelOne, British Gas, and others who trust Sublime to protect their most critical attack surface. As email threats evolve with AI-powered attacks, Sublime Security stands at the forefront with autonomous agents and transparent, auditable detection that security teams can trust.