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Upwind Raises $400 Million Series C at $3.8 Billion Valuation

The financing will accelerate the company's runtime and AI security roadmap by funding new AI sensors, agent tooling, and an AI Labs research effort.

Overview

  • The company announced the $400 million round on Oct. 28, 2026, led by Bessemer and bringing total capital raised to more than $800 million.
  • Upwind sells a runtime-native security platform that watches cloud workloads, APIs and AI agents in real time and delivers context to help teams spot and remediate live risk.
  • The startup has built three AI agents—Blue for investigations, Red for exploit testing, and Green for remediation suggestions—that customers are already using to validate and fix findings at scale.
  • Upwind says revenue quadrupled in 2026 and lists hundreds of customers across AWS, Azure, GCP and Oracle Cloud, but published ARR figures differ across outlets with reports ranging from just over $50 million to TechCrunch projections near $90 million.
  • The $3.8 billion price tags investors’ belief in fast growth but creates high valuation multiples that depend on disputed ARR, and reports of a near-$4 billion Datadog acquisition bid during the round remain contested while Upwind has chosen to stay independent.