Sentra raises $150M, led by Capital One Ventures, to control what AI agents can reach

As companies hand more work to AI agents and copilots, the question of what those agents can read becomes a security problem. Sentra's answer is to protect data at rest, where it already lives, across cloud, SaaS, data warehouses, on-prem file shares and the knowledge stores AI pulls from, rather than trying to inspect each agent request as it happens[1]. By governing the data and the access rights agents depend on ahead of time, it aims to keep protection in place beyond traditional network perimeters[1].

Sentra says it grew more than 300% year over year[1]. It has about 100 major enterprise customers in the US and Europe, makes tens of millions of dollars in revenue and employs 130 people, 65 of them in Tel Aviv, according to Ctech[4]. Sentra did not disclose a valuation, but CEO Yoav Regev said it has tripled since the previous round[4]. That round was a $50 million Series B led by Key1 Capital in April 2025[3].

On the product side, Sentra plans wider visibility into the agents, copilots and models that touch sensitive data, continuous least-privilege access for human and non-human identities, and faster containment when an agent behaves unexpectedly[1]. Commercially, it will scale field and channel sales and enter new markets[1], including a London office, plans to double headcount in Israel and the US, and a push into the US federal market with sales expected from the second half of 2027[4].

A bank's venture arm leading the round is a signal in itself. Financial firms hold some of the most sensitive data there is and are under pressure to deploy AI agents on it, so they are buying, and now funding, the tools that decide which of those agents gets to see what.