From teen hacker to Iron Dome researcher, this founder raised $28M to fight AI phishing

From teen hacker to Iron Dome researcher, this founder raised $28M to fight AI phishing Marina Temkin 2:08 PM PDT · May 19, 2026 Shay Shwartz knows a lot about email phishing attacks. As a teenager, he made money as a hacker, but after getting caught at age 16, he realized he could use his cyber talents to prevent attacks rather than launch them. He went on to spend about a decade in top-tier cybersecurity roles, leading major projects for Israel’s elite defense and intelligence units, including work connected to the Iron Dome project, before joining Axis, the startup later acquired by HPE. All along, he had been itching to launch his own startup, and two years ago, he finally took the plunge. His startup Ocean, an agentic email security platform built to fight AI-powered attacks, just emerged from stealth mode with $28 million in total funding. The round was led by Lightspeed Venture Partners, with participation from Picture Capital and Cerca Partners. High-profile angel investors also joined the round, including Wiz co-founder and CEO Assaf Rappaport, as well as Yevgeny Dibrov and Nadir Izrael, the co-founders of Armis, which recently sold to ServiceNow for $7.75 billion. While established vendors like Proofpoint and Mimecast, along with newer players like Abnormal Security, help detect standard phishing attacks, Shwartz (pictured right next to co-founder and CTO Oran Moyal) argues that AI requires a different defensive approach. In the past, only highly sophisticated hackers could pull off spear-phishing due to the sheer amount of time, research, and manual labor needed to launch targeted attacks. “AI just made the entire process automatic, so the scale is much, much bigger now,” Shwartz told TechCrunch. “I can instruct LLM to go and understand exactly who you are, harvest large amount of public information, and create those phishing attacks very targeted against you.” Ocean claims its AI can thoroughly analyze the context of every incoming email to detect fraud and impersonation attempts. The startup is already reviewing billions of emails each month for customers including Kayak, Kingston Technology, and Headspace. Shwartz said Ocean built a small language model tailored to quickly analyze emails, understand the sender’s intent, and evaluate it against the user’s specific organizational context. “This is like having a guard in every door,” Shwartz said. “This is how we make the inbox a safe place with high hygiene.” When you purchase through links in our articles, we may earn a small commission. This doesn’t affect our editorial independence. Marina Temkin Reporter, Venture Marina Temkin is a venture capital and startups reporter at TechCrunch. Prior to joining TechCrunch, she wrote about VC for PitchBook and Venture Capital Journal. Earlier in her career, Marina was a financial analyst and earned a CFA charterholder designation. You can contact or verify outreach from Marina by emailing marina.temkin@techcrunch.com or via encrypted message at +1 347-683-3909 on Signal. May 27 Athens, Greece StrictlyVC Athens is up next. Hear unfiltered insights straight from Europe’s tech leaders and connect with the people shaping what’s ahead. Lock in your spot before it’s gone. Most Popular Elon Musk has lost his lawsuit against Sam Altman and OpenAI Tim Fernholz Users turn to jailbreaking their older Kindles as Amazon ends support Lauren Forristal OpenAI launches ChatGPT for personal finance, will let you connect bank accounts Ivan Mehta US orders travelers on Air Force One to throw away gifts, pins, and burner phones after China trip Lorenzo Franceschi-Bicchierai OpenAI is reportedly preparing legal action against Apple; it wouldn’t be the first partner to feel burned Connie Loizos How to turn off Instagram’s new Instants feature and retract photos you accidentally shared Aisha Malik Musk’s xAI is running nearly 50 gas turbines unchecked at its Mississippi data center Tim De Chant X LinkedIn Facebook Instagram youTube Mastodon Threads Bluesky TechCrunchStaffContact UsAdvertiseCrunchboard JobsSite Map Terms of ServicePrivacy PolicyRSS Terms of UseCode of Conduct AnthropicSAPSamsungMarc LoreTechCrunch DisruptTech LayoffsChatGPT © 2026 TechCrunch Media LLC.