The Upwind Series C has closed: cloud and AI security company Upwind raised $400 million at a $3.8 billion valuation, led by Bessemer Venture Partners, as enterprises rush to secure cloud infrastructure and AI agents operating at machine speed. The company announced the raise on October 28, 2026, saying it had quadrupled its revenue in 2026 and now counts hundreds of enterprise customers, including Siemens, Roku, Carvana, Nubank, Supabase, and ClickUp.
What Was Announced?
The round brings Upwind’s total funding to more than $800 million, according to the company, and values it at $3.8 billion, up from $1.5 billion in its $250 million Series B in January 2026, which was also led by Bessemer. Bloomberg reported the company is on pace to reach nearly $100 million in annual recurring revenue by the end of the year.
Alongside Bessemer, the Series C drew a wide syndicate: Canapi Ventures joined as a new investor, while existing backers Cyberstarts, Greylock Partners, Craft Ventures, Leaders Fund, Salesforce Ventures, TCV, Alta Park Capital, Penny Jar Capital, Cerca Partners, Swish Ventures, and Picture Capital all participated.
The company says it will direct the capital toward product development and go-to-market expansion. “AI is fundamentally changing both the cloud infrastructure architecture and the scale of cyber threats and how organizations build and operate software,” said Amiram Shachar, CEO and co-founder of Upwind. “We built Upwind to unify those signals and eliminate complexity, helping organizations identify their most critical exposures, fix risks proactively, and detect attacks as they happen.”
Graphic: GPTOnline
Security Built for the Agentic Era
Founded in 2022, Upwind was designed around the premise that cloud security must account for what is happening inside live environments, rather than relying on periodic assessments and static snapshots. Its platform uses runtime intelligence across cloud workloads, APIs, and AI agents to give security, development, and DevOps teams a shared view of the most critical risks and reachable exposures.
The company positions the raise against the rapid adoption of autonomous AI agents inside enterprises. “Security needs to keep pace with environments that AI agents can change at a speed and scale that human teams alone cannot match,” Shachar said. “By combining real-time intelligence at runtime with the context needed to understand and remediate risk, we’re helping organizations move beyond alert management toward proactive security.”
To meet that speed, Upwind says security teams are being amplified with specialized AI agents that investigate threats autonomously, red-team attack surface findings, and remediate risks at machine speed. The platform supports Amazon Web Services, Microsoft Azure, Google Cloud Platform, and Oracle Cloud Infrastructure, and integrates with AWS Security Hub so customers can access it directly inside the AWS console with unified billing.
Graphic: GPTOnline
Why It Matters
The raise lands at a moment when investors are paying premium multiples for runtime security platforms, and it follows reports that Upwind walked away from a reported $4 billion acquisition offer from Datadog, a claim Datadog has disputed. A private valuation nearly identical to the reported offer signals the company’s bet that staying independent will pay off, backed by revenue that has quadrupled in a single year.
Customer quotes in the announcement underscore the pitch. Tushar Dalvi, Deputy CISO at Confluent, said: “Upwind gives us the exact visibility and context we need to stay ahead of cloud threats with complete confidence.” The company, which employs roughly 600 people across the United States, Israel, Europe, and Asia, described itself as the fastest-growing company in modern cloud and AI security.
