Sentra, a data-security startup built for the AI-agent era, announced on Wednesday, November 4, that it has raised $150 million in a Series C round led by Capital One Ventures. Why it matters: every AI agent a company switches on becomes another identity reading its data — and investors are paying up for tools that control what those agents can reach.
November 4, 2026 — AI News
What happened
Sentra said Capital One Ventures led the $150 million round and will take a seat on its board. Existing investors Bessemer Venture Partners, Zeev Ventures, Standard Investments, Munich Re Ventures and Key1 Capital also participated; Key1 led Sentra’s $50 million Series B in April 2025. The new round brings the company’s total funding to more than $250 million since its 2021 launch. Sentra did not disclose a valuation.
The details
Sentra’s platform works on data at rest, wherever a company keeps it — cloud services, SaaS applications, data warehouses, on-premises file shares and the knowledge stores AI systems draw from. It finds and classifies sensitive data with classification tuned to each customer’s business, then maps which people, service accounts and AI agents can reach each dataset, inherited permissions included. From there it removes stale and high-risk data, enforces least-privilege access, and flags agents that reach for data they do not normally touch; in the worst cases it can strip the permissions involved and hand the incident to the data’s owner, with a record of everything the agent could have reached for legal and compliance teams. The company says the analysis runs inside the customer’s own environment, so sensitive data never leaves it.
Sentra says its business grew more than 300% over the past year — a company-reported figure. Co-founder and CEO Yoav Regev called AI agents “the busiest consumers of enterprise data,” arguing that many inherit access to data that was never fully classified or governed. The company, co-headquartered in New York and Tel Aviv, was founded in 2021 by Regev with Asaf Kochan, Ron Reiter and Yair Cohen. The new money will fund broader visibility into the agents, copilots and models touching sensitive data, faster containment when an agent behaves unexpectedly, and an expanded go-to-market push into new geographies.
Why it matters
Security tooling was built to watch people, one request at a time. Agents work continuously and at machine speed, often with broad inherited access — a governance gap most companies have not closed. Sentra’s bet is that the cheaper place to fix it is the data itself: secure what agents can reach before they reach it, rather than inspecting every action after the fact. A $150 million round led by a bank’s venture arm — banks being among the most regulated, data-sensitive buyers there are — is a strong signal that agent data governance is becoming a budget line, not a pilot. Our take, in the spirit of everything AI, tested: the agent boom’s second wave is the control plane, and it is raising like it.
Frequently asked questions
How much did Sentra raise, and who led the round?
$150 million in a Series C led by Capital One Ventures, which also takes a board seat. Total funding is now more than $250 million; no valuation was disclosed.
What does Sentra’s platform actually do?
It discovers and classifies sensitive data at rest, maps which people, service accounts and AI agents can access it, enforces least-privilege access, and flags or contains agents that reach for data outside their normal pattern.
Why is AI-agent data access a security problem?
Agents run continuously at machine speed and often inherit broad permissions to data that was never fully classified, so a misconfigured or compromised agent can expose far more than a single careless employee.
Sources: SiliconANGLE, Wall Street Journal, SecurityWeek, Sentra