Cylake, a cybersecurity company focused on operational sovereignty, announced on September 8, 2026 that it has raised $245 million through a convertible note. The financing included Lightspeed Venture Partners, Picture Capital, and Redpoint Ventures, bringing the company's total raised to $290 million after a $45 million seed round in March 2026 led by Greylock Partners. The new capital will support product development, team growth, and the delivery of a beta platform by the end of 2026.
Strategic Investment and Board Participation
The convertible note brings new governance support to Cylake. Ravi Mhatre, Partner and Co-founder at Lightspeed Venture Partners, will join the company's Board of Directors, while Rakesh Loonkar, Partner at Picture Capital, will serve as a board observer. Both investors pointed to Cylake's early recognition of how AI and SaaS have reshaped enterprise cybersecurity as a key reason for their participation.
Addressing a Market Gap
Cylake is targeting highly regulated commercial and government organizations that require data sovereignty and full operational control. The company argues that most existing security approaches were not designed for the ways AI and SaaS have changed enterprise requirements. By focusing on this gap early, Cylake aims to provide an alternative to public cloud-dependent security models.
Platform Architecture and Product Vision
The company is developing a platform that operates entirely on premises or in private cloud environments. This approach allows organizations to maintain full control over their data, infrastructure, and operations. Cylake also uses a single, complete data foundation to avoid coverage gaps and support AI workflows with an end-to-end view.
Rather than relying on fragmented security tools that operate on partial information, the platform provides a holistic view of data and context across an organization's infrastructure. This approach is meant to reduce vulnerabilities that arise when security operations lack complete visibility. Cylake says the unified foundation is central to enabling both strong protection and AI-native workflows.
Design Partners and Timeline
Currently, Cylake is collaborating with a cohort of industry-leading design partners to refine its platform for highly regulated commercial and government organizations. A beta product is expected by the end of 2026, with full general availability planned for 2027. This timeline reflects the company's focus on meeting real operational requirements before making the platform broadly available.
Momentum and Team Expansion
Since emerging from stealth in March 2026, Cylake has grown to more than 40 employees and continues to hire across engineering, product, and other key functions. The company has also deepened its work with design partners ahead of the planned beta. Its leadership says the new investment will accelerate efforts to rebuild cybersecurity architecture around complete data, sovereignty, and control for an AI-native world.
Leadership Perspective
Chief Executive Officer and Founder Nir Zuk said Cylake is built for organizations that cannot compromise between advanced cybersecurity technology and control over data and infrastructure. He noted that public cloud is not always the right operating model for such cases. The architecture, he said, needs to be rebuilt around complete data, sovereignty, and control for an AI-native world.
Cylake's $245 million convertible note provides substantial resources as the company moves toward beta delivery and general availability. With new board participation, a growing team, and a platform focused on sovereignty and control, the company is positioning itself for highly regulated environments. The funding reinforces its goal of combining advanced AI-native cybersecurity with full operational independence for commercial and government organizations.