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Sequoia co-led a $25 million Series A funding round for AI security startup Cymphony, partnering to help enterprises govern and remediate risks from AI agents

Funding Provisional 78% confidence first seen

Sequoia and other investors backed AI security startup Cymphony with a $25 million Series A round co-led by Sequoia. The coverage says Sequoia’s involvement includes partnering efforts focused on governance controls for enterprise AI agents, including continuous mapping of agent access and recommended remediation to address emerging security risks.

Cymphony Sequoia Sequoia Capital Cymphony’s workforce-graph approach SMBC Fin Atlas Beyond Fund

The deal

Cymphony $25 million Series A · announced 9 Sep 2026

Investors Sequoia Capital SMBC Fin Atlas Beyond Fund

Deal terms as reported in the coverage below.

Source coverage

Partnering with Cymphony: Security Unlocks Adoption Sequoia Sequoia doubles down on Cymphony as AI agents create new enterprise security risks TechCrunch independent

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