Upwind Security reportedly raising $300 million at $3.8 billion valuation

Upwind Security is reportedly raising $300 million in new financing, which would value the company at $3.8 billion. The funding round is being led by Bessemer Venture Partners, with TCV acting as a co-lead. Other participating investors include Craft Ventures, Salesforce Ventures, Greylock, Cyberstarts, Leaders Fund, and Alta Park Capital.

This latest valuation marks a significant increase from January 2026, when the company raised $250 million at an approximate $1.5 billion valuation. Founded in 2022 by former Spot.io team members, Upwind Security provides a cloud security platform designed to offer real-time visibility into cloud infrastructure and identify vulnerabilities across production environments, including emerging AI applications.