Upwind Security raises $400M Series C at $3.8B valuation, Greylock quadruples down
SethGRosenberg · x · 2026-10-29
Cloud & AI security platform Upwind Security announced a $400M Series C at a $3.8B valuation, with Greylock quadrupling down. Revenue quadrupled in 2026 and hundreds of organizations rely on its runtime-first platform to secure cloud and AI environments, as static scans fall behind AI-speed attacks. Total funding now exceeds $800M.
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