Novee, a cybersecurity startup focused on artificial intelligence-driven offensive security, announced its emergence from stealth mode on Wednesday with a significant funding round of $51.5 million. The investment was led by YL Ventures, Canaan Partners, and Zeev Ventures.
The company, founded in May 2025, managed to complete its Series A funding just four months post-launch, a pace that Novee attributes to robust customer interest, a team with extensive expertise in AI research and cybersecurity, and escalating worries regarding increasingly automated cyberattacks.
Novee’s platform leverages AI to simulate tactics utilized by real-world hackers, providing continuous penetration testing aimed at identifying advanced vulnerabilities. The system emphasizes the detection of complex business logic flaws and delivers automated retesting to ensure that critical risks are promptly addressed.
“Attackers don’t wait for your annual pentest, and neither should your defense,” remarked Novee co-founder and CEO Ido Geffen. “Novee has already helped organizations uncover hundreds of these novel vulnerabilities and fix them continuously, closing gaps before attackers can exploit them.”
What distinguishes Novee from other platforms is its proprietary AI model, specifically trained on offensive security data and techniques. The company claims its model outperforms leading large language models, including Gemini 2.5 Pro and Claude 4 Sonnet, by more than 55% in web exploitation tasks, achieving an accuracy rate of 90%.
“Penetration testing is an adversarial, environment-driven problem,” noted Tal Shapira, CTO at Reco AI. “Purpose-trained models will consistently outperform general-purpose language models in this domain.”
Customers such as enterprise software firm Cresta have praised Novee’s platform for its effectiveness in identifying hard-to-detect vulnerabilities. “We needed testing that could identify more complex vulnerabilities, like server-side request forgery, which scanners just aren’t capable of detecting,” stated Robert Kugler, Cresta’s head of security. “Novee filled that gap.”
Novee was co-founded by Geffen, Gon Chalamish (chief product officer), and Omer Ninburg (chief technology officer), all of whom have backgrounds in elite cyber units within the IDF. The company is headquartered in Tel Aviv.
“Novee is built by a team that has spent decades operating at the highest levels of offensive cyber and critical infrastructure defense,” remarked Yoav Leitersdorf, managing partner at YL Ventures. “They understand how real attackers think because they have done this work themselves, at scale and under real-world constraints. What they are building reflects a deep understanding of how AI is reshaping the balance between attack and defense. As AI changes the speed and nature of attacks, offensive security becomes a continuous capability, not a periodic exercise. Novee is executing on that shift with rare technical rigor and conviction.”
As the cybersecurity landscape evolves with the advent of AI technologies, Novee’s approach underscores a growing trend toward continuous security measures rather than traditional periodic assessments. The speed and sophistication of cyberattacks necessitate a proactive stance, and Novee positions itself at the forefront of this critical shift in the industry.
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