Upwind Nears $300 Million Raise at $3.8 Billion Valuation

Upwind is an Israeli cloud-security startup focused on cloud-native application protection, using runtime context to identify active threats and help security teams prioritize vulnerabilities that pose immediate risk. The approach is gaining importance as companies deploy large language models and autonomous AI agents in cloud environments, widening the attack surface beyond infrastructure and applications to include models, prompts, data flows and agent behavior.

Upwind was nearing a roughly $300 million financing led by existing investor Bessemer Venture Partners, Israeli business publication Globes reported on Sept. 2, 2026, citing people familiar with the matter. The deal values the company at about $3.8 billion, more than double its roughly $1.5 billion valuation when it raised $250 million in January. Upwind is also extending its runtime-security architecture through an AI Security Platform designed to protect AI models and agents.