Company Overview
About Sublime Security
Sublime Security is a Washington D.C.-based AI-powered email security platform — backed with $240+ million in total funding including a $150 million Series C in November 2025 led by Georgian with Avenir and 01A — providing enterprise security teams with adaptive email threat detection and autonomous AI agents that protect organizations from phishing, business email compromise (BEC), and advanced email-based attacks. The platform's two autonomous AI agents — ASA (Autonomous Security Analyst) that investigates and triages threats in seconds, and ADÉ (Autonomous Detection Engineer) that deploys tailored detection rules for novel threats in hours — drove 100% ARR growth in the first half of 2025 with 100% enterprise customer retention since inception. Serving Spotify, Snowflake, Zscaler, Anduril, and SentinelOne, Sublime is built on a detection-as-code philosophy using MQL (Message Query Language) for auditable, customizable detection rules. Founded in 2019 by Josh Kamdjou (10 years DoD and private sector red team, where phishing was consistently the fastest network access vector) and Ian Thiel.
Business Model & Competitive Advantage
Sublime's detection-as-code email security architecture addresses the opacity and rigidity that makes legacy email security tools fail against novel AI-generated attacks: traditional email security platforms (Proofpoint, Mimecast, Microsoft Defender) use static rule-based and ML signature models trained on historical attack patterns — which fail against LLM-generated spear phishing that mimics legitimate communication style, novel BEC attack patterns not in training data, and zero-day credential harvesting campaigns. Sublime's MQL-based detection engine (allowing security teams to write, backtest against historical email data, and deploy custom detection rules in hours) combined with the ADÉ autonomous agent (automatically generating new detection rules when it identifies novel attack patterns in email traffic) provides the adaptive defense layer that maintains detection coverage as attacker techniques evolve rather than waiting for vendor signature updates.
Competitive Landscape 2025–2026
In 2025, Sublime competes in the enterprise email security, AI-powered threat detection, and security automation market with Proofpoint (private, $4.5B+ revenue, email security leader), Abnormal Security (AI email security, $400M raised at $4B valuation), and Microsoft Defender for Office 365 (NASDAQ: MSFT, email security integrated in M365) for enterprise security team email threat detection and BEC prevention platform adoption. Georgian's Series C leadership reflects security AI application conviction. The 100% ARR growth in H1 2025 demonstrates strong enterprise adoption momentum. Customers like Anduril (defense tech, high-security requirements) validate the platform's suitability for security-sensitive organizations that need transparent, auditable detection over black-box vendor models. The 2025 strategy focuses on growing the enterprise SOC automation use case (ASA agent reducing analyst email alert investigation time from hours to seconds), expanding the Microsoft 365 and Google Workspace integrations for seamless deployment, and building the advanced persistent threat (APT) email campaign detection for government and defense sector customers.
The Sublime Security Story
Founders
Recent Activity
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Major milestones in Sublime Security's journey
Leadership Team
Meet the leaders behind Sublime Security
Josh Kamdjou
Josh Kamdjou founded Sublime Security and serves as CEO. He started working for the DoD in high school and spent 10 years engaged in offensive cyber initiatives and red teaming in the private sector, where phishing was always the fastest way to gain access. He holds a B.Sc. in Computer Science from the University of Maryland.
Ian Thiel
Ian Thiel co-founded Sublime Security and serves as COO. He was an early product and growth leader at Optimizely and most recently ran growth, marketing, and partnerships at Alto, bringing go-to-market expertise to Sublime.
Colin Jones
Colin Jones joined Sublime as President to run go-to-market operations. He was most recently Chief Revenue Officer at Wiz, where he led the company from $0 to $250M in revenue. He previously built successful teams at BigFix and Duo Security.
Key Differentiators
Emerging Innovator
Sublime Security is an emerging player bringing innovative solutions to the Security market.
Frequently Asked Questions
Estimated Visibility Trend (Beta)
Simulated 8-week rolling score
Based on estimated brand signals. Historical tracking coming soon.
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