Sentra, a New York and Tel Aviv startup focused on AI agent data security, has raised $150 million in a round led by Capital One Ventures. The company wants to control which people and AI agents can touch sensitive company data before anything goes wrong. It’s one of the clearest signs yet that investors see rogue or over-permissioned agents as a real business risk, not a future one.
The $150 Million Round at a Glance
Sentra announced the funding on November 4, 2026. Capital One Ventures, the venture arm of the bank, led the round, and a Capital One representative will join Sentra’s board. Existing backers Bessemer Venture Partners, Zeev Ventures, Standard Investments, Munich Re Ventures and Key1 Capital also put in money.
Reporting on the deal describes it as a Series C. It follows a $50 million Series B led by Key1 in April 2025, and it pushes Sentra’s total funding past $250 million. The company did not share a valuation.
| Detail | What we know |
|---|---|
| Amount raised | $150 million |
| Lead investor | Capital One Ventures |
| Other investors | Bessemer, Zeev Ventures, Standard Investments, Munich Re Ventures, Key1 Capital |
| Total funding | More than $250 million |
| Reported growth | More than 300% over the past year (company figure) |
| Founded | 2021, by Yoav Regev, Asaf Kochan, Ron Reiter and Yair Cohen |
| Valuation | Not disclosed |
The founders have deep security roots. Kochan is a former commander of Israel’s Unit 8200 intelligence unit, and Regev, now CEO, once led that unit’s cyber department.
Why AI Agent Data Security Is Suddenly a Big Deal
Every AI agent a company switches on is effectively a new user with its own access rights. Agents read data constantly and at machine speed, and most companies have no central place to see what each one can reach. Sentra says only a small minority of organizations have governance in place to control that access.
The problem often comes from inherited permissions. An assistant connected to a shared drive or data warehouse may quietly gain access to files nobody ever classified as sensitive. CEO Yoav Regev calls agents “the busiest consumers of enterprise data,” and argues that old perimeter tools were never built for that pace.
That’s the same concern behind a wave of recent deals. We’ve covered Reco’s agent security round and Pluto Security’s funding, and big platforms are adding agent security tools of their own.
How Sentra Handles Data Security for AI Agents
Instead of trying to inspect every agent request in real time, Sentra focuses on the data itself, wherever it’s stored. That includes cloud services, SaaS apps, data warehouses, on-premises file shares and the knowledge stores that AI tools pull from. The company breaks its approach into three stages.
Before, during and after an incident
- Before: it finds and classifies sensitive data, maps which people, service accounts and agents can reach it, trims access to the minimum, and removes stale or risky data agents should never see.
- During: it flags unusual access to sensitive files, can revoke permissions or risky sharing automatically, and routes the worst cases to the data’s owner.
- After: it shows security, legal and compliance teams everything an agent could have reached, with business context for each dataset.
Sentra also stresses that its analysis runs inside the customer’s own environment, so the data never leaves. The company argues that tools copying data into a vendor’s cloud create a second data store to protect, which is a headache for banks and other regulated firms. Its platform combines several security categories, including data security posture management and data loss prevention, under one roof.
Where the Money Will Go
Sentra says the new cash will fund better visibility into the agents, copilots and models touching sensitive data. It also plans to speed up containment for agents that behave unexpectedly. On the business side, it will expand its sales field and channel programs, grow its marketing and enter new regions.
Customers already include Lyft, whose CISO Chaim Sanders said in the announcement that the company needs to know what its agents can reach before turning them on. For a bank-backed investor like Capital One, that pitch hits close to home.
What This Means for You
If your team is rolling out copilots or agents, this deal is a useful reminder to check the plumbing first. A few practical steps apply no matter which vendor you use:
- List every AI agent and assistant that connects to company data, and who approved it.
- Review what each one can access, especially permissions inherited from shared drives and groups.
- Clean out old, duplicate or sensitive files that no agent needs to see.
- Set up alerts for unusual access to sensitive data, and decide who responds.
For a broader view of the field, see our guide to AI threat detection or browse the latest AI news updates.
Sources
Primary source: Sentra’s funding announcement. Additional reporting from SiliconANGLE and CTech.
Conclusion
Sentra’s $150 million raise shows how quickly AI agent data security has moved from a niche worry to a funding priority. The company is betting that the safest way to deploy agents is to secure the data they reach before they ever start working. With a major bank leading the round and growth above 300% by its own count, that bet is getting serious backing. Expect more companies to ask hard questions about agent access before their next AI rollout.
