San Francisco-based cloud infrastructure security startup Upwind has completed a massive $400 million Series C funding round, lifting its private market valuation to $3.8 billion. The financing round was spearheaded by Bessemer Venture Partners, alongside continued backing from earlier investors including Greylock Partners and Craft Ventures. The cash injection comes only nine months after the four-year-old firm closed a $250 million round that had pegged its valuation at $1.5 billion, marking an extraordinary surge in enterprise worth over a short window.
Rejecting the Datadog Takeover Attempt
The financing effort had been underway for months and nearly disintegrated when enterprise observability firm Datadog made an aggressive bid to purchase Upwind outright. Datadog, a publicly traded company known for its tools that monitor software operations, declined to offer a premium over the $3.8 billion valuation established by venture capital investors. Unwilling to sell without a valuation upside, Upwind decided to pull back from the acquisition talks and pursue independent expansion instead. Even so, given the limited number of cybersecurity listings on public markets in recent years, an eventual acquisition by a larger industry player remains a strong possibility down the road, and the startup continues to attract persistent acquisition inquiries.
Revenue Momentum and SaaS Multiples
Surging threats linked to AI-driven cyber attacks have accelerated Upwind's operational momentum. The company has been expanding its annualized recurring revenue by $20 million to $30 million each quarter, placing it on track to close the calendar year with approximately $90 million in ARR. At the current $3.8 billion valuation, venture investors and Datadog evaluated the enterprise at more than 40 times its projected forward ARR, a customary benchmark used to price high-growth enterprise software businesses. While steep, that multiple sits well under the 80 times ARR fetched earlier by fellow fast-scaling cybersecurity competitor Cyera.
The Expanding Frontier of AI Cloud Defense
Enterprise appetite for automated security mechanisms is swelling across the corporate landscape. As Theory Ventures general partner Tomasz Tunguz recently wrote on his industry blog, cybersecurity is turning into the third primary wave of commercial AI adoption, trailing only automated coding assistants and customer service tools. Upwind specializes in what the sector classifies as runtime cloud defense, which continuously monitors live workloads to detect vulnerabilities and neutralize threats while active services run. The company was founded by serial entrepreneur Amiram Shachar, who earlier developed cloud cost optimization platform Spot.io and sold it to NetApp in a $450 million transaction.
