Cylake has raised $245m through a convertible note ahead of the beta launch of its next-generation product.
The round saw participation from Lightspeed Venture Partners, Picture Capital and Redpoint Ventures, and pushes the company’s total funding to $290m, following a $45m seed round closed in March 2026 under the leadership of Greylock Partners.
Cylake intends to direct the new capital towards further development of its AI-native, fully sovereign cybersecurity platform, alongside continued expansion of its workforce.
The firm is currently collaborating with a group of leading design partners to build a cyber platform tailored to demanding commercial and government clients, with a beta version due by the close of 2026 and a full market launch pencilled in for 2027.
The platform is designed for organisations that need comprehensive cybersecurity protection without giving up sovereignty over their data. It will run wholly on premises or within private cloud settings, letting clients retain complete oversight of their data, systems and operations.
By working from one unified data base, Cylake aims to close the gaps left by disconnected tools, gaps that often become entry points for attackers, while giving AI-driven processes a full picture of the organisation’s environment.
Since exiting stealth mode in March, Cylake has scaled up its engineering and product divisions and strengthened collaboration with its design partners in preparation for beta testing. Headcount has now surpassed 40, with further recruitment planned across engineering, product and other core areas as the company builds towards general availability.
Cylake’s platform is built around a single data foundation for organisations operating under tight regulatory demands, ones that need heightened sovereignty, oversight and visibility over their systems.
Instead of stitching together disjointed tools that each see only part of the picture, the platform is designed to give organisations complete, unified visibility over data and context across their entire infrastructure while preserving full operational command.
Cylake CEO and founder Nir Zuk said, “We are building Cylake for organizations that cannot compromise between adopting advanced cybersecurity technology and maintaining control of their data and infrastructure. In those cases, the public cloud is not the right operating model. The architecture needs to be rebuilt around complete data, sovereignty, and control for an AI-native world. This investment lets us accelerate that work.”
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