Upwind Security announced a $400 million Series C funding round led by Bessemer Venture Partners at a $3.8 billion valuation, up from $1.5 billion in January. The company says its revenue quadrupled in 2026 but has not disclosed dollar figures.
Upwind said it plans to use the money to develop AI sensors for endpoints and scanners for AI agents and their skills, and to expand into identity, data and AI security.
