As artificial intelligence (AI) systems gain access to the same sensitive corporate data and systems as human workers, but operate at machine speed, companies are facing new and complex security challenges. To address this, Sequoia Capital, a well-known venture capital firm, has invested $30 million in a startup called Cymphony. This investment includes a $25 million Series A round co-led by Sequoia and SMBC Fin Atlas Beyond Fund, valuing Cymphony at over $100 million after the funding. The startup is based in New York and Tel Aviv and is working to help enterprises manage the growing presence of AI tools within their operations. Traditional security systems were designed with human employees in mind, but AI agents—software programs capable of performing tasks independently—do not follow the same access and identity controls. These AI systems can interact with multiple internal systems and handle large amounts of sensitive data, making it difficult for companies to track what information they can access. Cymphony aims to solve this issue by providing a centralized view of all identities, including employees, AI agents, and other non-human actors, along with the systems and data they can access. At the heart of Cymphony’s platform is a “workforce graph,” which integrates identity, data, and activity signals into a single, unified system. This allows security teams to monitor and manage access more effectively. In one example, Cymphony identified over 85,000 files that had become accessible to AI tools within a U.S. public company. The startup helped secure those files and confirmed that none had been accessed through the AI systems. In another case, an external collaborator had installed an unauthorized version of Anthropic’s Claude, which used existing access to scan thousands of sensitive files. Cymphony’s platform not only identifies such risks but also uses AI to investigate incidents, prioritize security tasks, and even automatically fix access issues. Cymphony’s journey began with Sequoia’s initial investment in its seed round, even before the startup had a clear product direction. The venture firm placed its trust in the founders—Shy Dekel, Idan Berkovits, and Edi Gotlieb—who all graduated from Talpiot, an elite Israeli military program known for producing top technology and leadership talent. By the time of the Series A, Cymphony had developed a product, signed multiple enterprise clients, and reached seven figures in annual recurring revenue. Today, its customers include major firms such as KKR, Syngenta, and Cass Information Systems. As AI agent security becomes more critical, Cymphony is positioning itself as a key player in this growing field.