Cylake Raises $45 Million Seed Round

Cylake Raises $45 Million Seed Round

Cylake, a Sunnyvale, CA-based AI-native cybersecurity platform, has emerged from stealth with $45 million in Seed funding

The round was led by Greylock, a venture capital firm headquartered in Menlo Park, California, with a significant second office in San Francisco. The firm focuses on seed, Series A, and early-stage investments in AI-native software, cybersecurity, and enterprise infrastructure.

The company will use the funding to develop its AI-native cybersecurity platform, which operates fully within customers’ sovereign environments.

Founded by Nir Zuk, Wilson Xu, and Ehud (Udi) Shamir, Cylake is an AI-native cybersecurity company developing a complete, AI-native, data-driven cybersecurity platform designed for full data sovereignty and intended for on-premises and private environments that require operational control and accountability. Headquartered in Sunnyvale, California, Cylake is focused on helping organizations that operate under strict constraints maintain security at scale.

Funding Details

Company: Cylake

Raised: $45.0M

Round: Seed

Funding Date: March 2026

Lead Investor: Greylock

Additional Investors:

Company Website: https://cylake.com/

Software Category: Cybersecurity / AI-Native Security Platform