Every enterprise that deployed an AI agent in 2026 created a new security problem they had not planned for. The agent needed access to data. Lots of data. Customer records. Financial systems. Internal documents. HR files. Legal contracts. And unlike a human employee, the agent did not exercise discretion about what it accessed — it accessed everything it was technically permitted to reach, whether or not that access was operationally necessary for the task at hand.
Cyera was built to solve that problem. On September 22 2026, the New York company raised $400 million in a Series G extension from Growth Equity at Goldman Sachs Alternatives, at nearly a $2 billion post-money valuation. Evolution Equity led the original Series G, and the Goldman Sachs capital builds directly on that round. Follow every US startup funding story at BestStartup US.
The Problem Cyera Is Solving
AI agents are the fastest-growing attack surface in enterprise security. A human employee has a defined job function, a manager who approves access requests, and an HR file that documents what they are permitted to do. An AI agent has a prompt, a set of tool permissions, and the ability to execute hundreds of actions per minute across dozens of connected systems simultaneously.
The permission model that enterprises built for human employees does not translate to AI agents. A customer service agent that needs access to order history does not need access to the entire customer database. A finance AI that processes invoices does not need access to strategic planning documents. But without deliberate, granular access controls designed specifically for AI agents, that is exactly what happens. Cyera’s platform is the layer that enforces those controls — defining what data every person, machine and AI agent in an enterprise is permitted to see and do, and monitoring for violations in real time. Read more US AI security startup stories at BestStartup US.
The Oasis Security Acquisition
Earlier in 2026, Cyera acquired Oasis Security, a specialist in non-human identity management. The acquisition gave Cyera the capability to manage not just what AI agents can see, but what every non-human identity in an enterprise — service accounts, API keys, automation scripts, machine identities — is permitted to access.
The combination of AI agent monitoring and non-human identity management inside one platform is strategically important. The fastest-growing category of enterprise identity is not human employees. It is non-human accounts — the service accounts and automated processes that already outnumber human users in most large enterprises, and that AI agents are now joining at an accelerating rate. A security platform that manages human identity without managing non-human identity is already incomplete. Cyera, with Oasis integrated, manages both. Follow US cybersecurity and AI startup funding at BestStartup US.
Why Goldman Sachs Led This Round
Goldman Sachs Alternatives does not lead growth equity rounds in cybersecurity companies because it is excited about the technology. It leads them because the commercial metrics justify institutional capital at scale. Cyera’s $400 million extension follows an earlier Series G led by Evolution Equity — meaning Cyera has now raised more than $1.9 billion in total capital and has attracted two separate institutional-quality lead investors in the same round.
The Wall Street Journal reported that the Goldman Sachs financing gives Cyera additional freedom to invest in products and M&A while delaying a public listing if private capital remains attractive. That framing is significant. Cyera is not raising because it needs the money. It is raising because Goldman Sachs offered terms that are more attractive than what public markets would provide right now — and because the additional capital accelerates the product roadmap and acquisition strategy that will define Cyera’s market position when it does eventually go public. Also read: Snorkel AI raises $350M frontier AI data lab and Crusoe raises $3.9B AI infrastructure. Follow every US startup story at BestStartup US.
Key Takeaways
Cyera raised $400 million Series G extension from Goldman Sachs Alternatives on September 22 2026 at nearly $2 billion valuation. Evolution Equity led the original Series G. Total capital raised now exceeds $1.9 billion. AI-native data and identity security platform. Acquired Oasis Security to combine AI agent monitoring with non-human identity management. Addresses the fastest-growing attack surface in enterprise security — AI agent data access. Goldman Sachs financing delays IPO while enabling continued product and M&A investment. Expanding across federal markets, Europe, Middle East, Africa and Asia-Pacific.
Frequently Asked Questions
What is Cyera and what does it do?
Cyera is an AI-native data and identity security company that controls what every person, machine and AI agent in an enterprise can access. Through its acquisition of Oasis Security, it combines AI agent monitoring with non-human identity management in one platform.
How much did Cyera raise in September 2026?
Cyera raised $400 million in a Series G extension from Growth Equity at Goldman Sachs Alternatives on September 22 2026 at nearly a $2 billion post-money valuation. Total capital raised now exceeds $1.9 billion.
Why is AI agent security a growing problem?
AI agents access data automatically and at scale, often without the discretion a human employee would exercise. Without deliberate access controls designed for AI agents, they can reach data far beyond what is operationally necessary — creating significant security and compliance risks for enterprises.
Where can I follow US AI startup funding news?
Follow every US startup funding round and AI ecosystem story at BestStartup US — updated every week.
