Sentra raises $150M Series C to control what AI agents can reach

Sentra, a data security company, raised $150 million in a Series C round announced on November 4, according to its press release. Capital One Ventures led the round, and Sentra says it will use the money to control what AI agents can reach in corporate data. The company did not disclose a valuation.

Companies are giving AI agents access to files, databases and SaaS apps, and those agents read far more data than any one employee does. Sentra sells the layer that decides which data they are allowed to touch.

Who invested and how much

Capital One Ventures led the round and a Capital One representative will join Sentra's board. Existing investors Bessemer Venture Partners, Zeev Ventures, Standard Investments, Munich Re Ventures and Key1 Capital also took part. SiliconANGLE reports that Sentra has now raised more than $250 million in total, and that Key1 led its $50 million Series B in April 2025.

Sentra says its business grew more than 300% over the past year. That figure comes from the company and is not independently checked.

What the product does

Sentra calls it an agentic data security platform. It works on data at rest: cloud storage, SaaS apps, data warehouses, file shares and the stores that feed AI tools. The company describes three steps:

• Before an agent runs: find and classify sensitive data, map which people and AI agents can reach it, including inherited permissions, and cut access down to what the job needs.
• While it runs: flag an agent that reaches for sensitive data it does not normally touch, and revoke access or remove risky sharing automatically.
• After an incident: produce a record of everything the agent could have reached, for security, legal and compliance teams.

Sentra says its analysis runs inside the customer's own environment, so the data is not moved out of it. The platform combines data security posture management, data detection and response, data access governance and data loss prevention, four categories that security teams usually buy separately.

Lyft is the one customer the release names. Its CISO, Chaim Sanders, says Sentra lets his team confirm what data agents can reach before they are deployed.

"AI agents are now the busiest consumers of enterprise data," co-founder and CEO Yoav Regev said in the release.

What the money is for

Sentra plans to spend it on three things: more visibility into agents, copilots and models that touch sensitive data, faster containment when an agent behaves unexpectedly, and growth in new regions. The company was founded in 2021 by Regev, Asaf Kochan, Ron Reiter and Yair Cohen, and is based in New York and Tel Aviv.

What to watch is whether the big cloud and identity vendors build the same controls into their own agent platforms. The release does not say how Sentra would compete with them.