Ocean raises $28 million in total funding led by Lightspeed Venture Partners

Well-known angel investors also joined, including Assaf Rappaport from Wiz, Yevgeny Dibrov and Nadir Izrael from Armis, and Dor Knafo, former CEO of Axis Security and partner at Cyberstarts.

Ocean has built an AI-powered email security platform that can automatically investigate and stop advanced cyberattacks. The platform protects hundreds of thousands of email accounts and offers a modern alternative to older security systems that struggle against today’s AI-driven threats.

“The challenge is no longer simply detecting malicious emails, it’s understanding the intent within increasingly realistic communication,” said Shay Shwartz, CEO and co-founder of Ocean. “Security teams are wasting significant efforts looking for outliers in a world where attacks are designed to look normal. AI-powered attackers go beyond the signals traditional tools measure, blending seamlessly into normal business communication by leveraging AI to produce flawless language, reference real projects, and convincingly mimic legitimate relationships and behaviors. Ocean replaces surface-level detection with AI agents that analyze every email as a dynamic investigation, understanding context, verifying signals, and uncovering nefarious intent at scale.”

"We invested in a team and a vision, but the thesis was undeniable. AI broke email security, and it handed attackers an unfair advantage overnight. What stood out was that the team came from the offensive side,” Mike Fey, co-founder and CEO of Island. “They don't just understand the threat landscape - they used to shape it as attackers. AI is a prime technology to solve it once and for all. It excels at understanding language, intent, and context. Exactly what email security solution requires. Right team, right time.”

“We look for companies that emerge when a market's foundational assumptions are breaking,” said David Gussarsky, Lightspeed Venture Partners. “Email security is at one of those moments. The scale and realism of today’s attacks are forcing organizations to rethink strategy. Ocean stood out to us not just for its technical approach, but for the clarity of its vision and the team’s deep experience in AI and in both the offensive and defensive sides of email security. That combination is why we believe Ocean is uniquely positioned to define this next phase of the market.”

Founded in 2024 by Shay Shwartz and Oran Moyal, Ocean is the first Agentic Email Security platform designed to protect companies from modern AI-powered cyberattacks. Its system uses multiple AI agents to check every email in real time, understand user behavior, verify message authenticity and detect hidden threats that older security tools often miss.

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