What Happened

Upwind, an Israeli cloud security scale-up, raised roughly $300 million at a $3.8 billion valuation, led by Bessemer Venture Partners and TCV. The round came less than eight months after a $250 million Series B at $1.5 billion, with Salesforce Ventures, Craft Ventures, Greylock, and Cyberstarts also participating.

The company, founded by former Spot.io founders, sells a runtime-first CNAPP platform and is expanding into AI security with research on detecting prompt injection and data exfiltration.

Who Is Affected

SDRs and revenue leaders selling DevSecOps, cloud infrastructure, or AI governance tools should treat Upwind as a high-priority account. Its rapid valuation growth and fresh capital signal aggressive scaling across engineering, sales, and operations.

Buyers in the cloud security and CNAPP market will see increased competitive pressure and alternative options, making this an active conversation starter.

Market Impact

• Valuation jumped from $1.5B in January to $3.8B in September, adding ~$2.3B in under a year.
• Investor demand is accelerating at the intersection of cybersecurity, cloud infrastructure, and AI.
• Upwind's pivot to AI security could disrupt CNAPP incumbents and create demand for AI-specific protection.

The funding sequence — from $800-900M in late 2024 to $3.8B now — shows public market-style momentum in private cloud security.

What to Watch

Watch for Upwind to scale its enterprise sales team and expand partnerships, especially around AI security and Nvidia-related integrations. Its research on LLM threat detection at 95% precision suggests product launches in that area.

Competing CNAPP vendors may accelerate their own AI security roadmaps, making this a crowded but high-growth segment for outreach.

Related coverage

• Palo Alto Networks founder Nir Zuk raises $245M for new cybersecurity startup Cylake