Sequoia leads $25M Series A in AI security startup Cymphony at $100M+ valuation

Cymphony, a New York- and Tel Aviv-based cybersecurity startup, announced in September 2026 that it has raised $30 million in funding to help enterprises manage security risks created by AI agents operating inside their systems. The raise includes a $25 million Series A co-led by Sequoia Capital and SMBC Fin Atlas Beyond Fund, valuing the two-year-old company at more than $100 million. The round follows a previously undisclosed seed investment also led by Sequoia.

The company was founded by Shy Dekel, Idan Berkovits, and Edi Gotlieb — all alumni of Talpiot, the Israeli military’s selective technology and leadership program. Cymphony currently employs about 30 people across Tel Aviv and New York, and counts KKR, Syngenta, Cass Information Systems, and Athennian among its enterprise customers. It reached seven figures in annual recurring revenue within its first year of sales.

Cymphony’s platform gives security teams a unified view of employees, AI agents, and other non-human identities, along with the systems and data they can access. At its core is what the company calls a “workforce graph,” combining identity, data, and activity signals. The platform can also use AI agents to investigate incidents, prioritize issues, and automate remediation such as correcting access permissions.

The startup says it has already uncovered significant exposure inside large organizations. At one U.S. public company, Cymphony found roughly 85,000 files that had become accessible to AI tools and agents. In a separate case, an external collaborator had installed an unsanctioned instance of Anthropic’s Claude that used existing access to scan thousands of sensitive files.

Sequoia partner Bogomil Balkansky told TechCrunch that Cymphony stands out by treating identity and data security as a single problem — an approach he argues becomes more critical as AI agents can change behavior and acquire new capabilities at runtime, unlike human employees with stable roles. Sequoia has also been using Cymphony’s product internally since early in its development.

Cymphony faces competition from established security platforms including Microsoft, Okta, CyberArk, Wiz, and Varonis. Balkansky characterized Cymphony’s role today as largely complementary to existing tools, though he suggested it could begin displacing point solutions — particularly in data loss prevention — over time. Most of Cymphony’s current customers are in North America, with the company beginning to see demand from Europe, the Middle East, and Africa.

Source: TechCrunch

This article was generated by AI and cites original sources.
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