Upwind Security is closing a $300 million funding round that values the company at $3.8 billion, more than doubling the valuation it carried just eight months ago.
The round is being led by Bessemer Venture Partners, with participation from existing backers. It follows a $250 million raise in January 2026 that initially valued Upwind at $1.5 billion before extending to roughly $1.6 billion. With this latest infusion, the San Francisco-based startup has now raised more than $680 million in total funding.
From scrappy startup to cybersecurity heavyweight
Upwind was founded in 2022 by Amiram Shachar and former members of the Spot.io team. It builds a runtime-focused cloud security platform that watches cloud infrastructure in real time and tells security teams which threats actually matter.
Upwind’s annual recurring revenue sat below $20 million at the end of 2025. By mid-2026, that figure has ballooned to an estimated $50 million to $60 million. The company is targeting $100 million ARR by the end of this year.
