A $400 million funding round at a $3.8 billion valuation puts Upwind Security among the cloud security companies attracting substantial investor attention. The company, which reported that its revenue quadrupled in 2026, is raising capital as enterprises contend with expanding cloud infrastructure, more complex application environments, and the growing use of AI.
Bessemer Venture Partners led the Series C, with Canapi Ventures and existing investors participating. The new valuation marks a significant increase from the $1.5 billion valuation attached to Upwind’s Series B in January 2026. The company said the funding will support product development and go-to-market expansion.
The announcement offers a snapshot of both Upwind’s growth and the problem it is trying to address: security teams need to make decisions across cloud environments that are constantly changing, while AI adds new forms of activity to monitor and control.
A Market Defined by Operational Complexity
Cloud security platforms must account for more than the number of assets an organization operates. Security teams also need to understand how those assets interact, which services are exposed, and whether a weakness can be reached through an actual path in the environment.
That work becomes harder when applications span multiple cloud providers and development teams make frequent changes. Security tools that produce separate findings for workloads, APIs, and other infrastructure components can leave teams to piece together the wider picture themselves.
Upwind’s platform combines runtime intelligence with context from cloud workloads, APIs, and AI agents. It is designed to help security, development, and DevOps teams understand risks in relation to live environments, prioritize remediation, and detect attacks in real time.
“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. “Context is key to managing internal and external risks, security teams need to understand how cloud, and AI interact in real time. 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.”
From Cloud Visibility to Security Operations
The company’s platform is intended to help customers move beyond collecting findings toward deciding which issues deserve attention first. By connecting information about runtime activity with security risks, the system can help teams evaluate whether a potential exposure has practical significance and coordinate remediation accordingly.
Upwind supports Amazon Web Services, Microsoft Azure, Google Cloud Platform, and Oracle Cloud Infrastructure. Its AWS Security Hub integration gives customers access through the AWS console, with simplified onboarding and unified billing.
The company’s customer roster includes Siemens, Roku, Carvana, Nubank, Supabase, and ClickUp. Those names provide evidence of commercial reach across different sectors, although Upwind has not disclosed customer-level revenue, deployment sizes, or retention figures in the funding announcement.
The platform also incorporates AI agents that can investigate threats autonomously, validate attack-surface findings by acting as red teams, and remediate infrastructure risks at machine speed. These capabilities extend the company’s focus from visibility and prioritization into security workflows that can take action.
A Broad Investor Syndicate
Bessemer Venture Partners led the round, joined by Canapi Ventures and existing investors Cyberstarts, Greylock Partners, Craft Ventures, Leaders Fund, Salesforce Ventures, TCV, Alta Park Capital, Penny Jar Capital, Cerca Partners, Swish Ventures, and Picture Capital.
The participation of existing backers alongside the new lead investor gives Upwind additional capital to expand its product and commercial operations. The announcement does not disclose how the proceeds will be divided between research and development, hiring, sales, or international expansion.
Shachar described the financing as a way to build on the company’s market traction. “Our investors have backed our vision and the traction we’re seeing in the market,” Shachar said. “This round gives us the opportunity to accelerate our momentum, expand our capabilities, and continue delivering the innovation customers need to secure cloud and AI infrastructure in the agentic era.”
What the Next Stage Will Require
Funding and revenue growth offer useful signals about a company’s position, but they do not settle the competitive question. Cloud security vendors must show that their platforms can improve how organizations identify and resolve risk, integrate with existing infrastructure, and keep pace with new applications and AI-driven workloads.
Upwind’s reported fourfold revenue growth in 2026 points to increasing commercial momentum, while its valuation has risen substantially since January. Its next challenge will be turning that momentum into a durable position in a market where customers have multiple security products to evaluate and complex environments to protect.
The $400 million round gives the company resources to pursue that goal. Its longer-term progress will depend on whether runtime intelligence, contextual risk analysis, and automated security workflows translate into outcomes customers can consistently measure.