Upwind sells security software for companies whose applications run in the cloud. Its users are security, software-development and operations teams trying to understand which systems are exposed and what needs fixing first. CTech reported on September 2 that the company had raised about $300 million at a roughly $3.8 billion valuation, adding capital behind that operating-risk approach.
The product combines scans of cloud configurations with sensors that observe software while it runs. That second layer is often called runtime security: it looks at activity inside a working environment, not only how the environment is configured. Upwind says its live inventory maps applications, connections and accessible data so teams can relate a warning to the system actually affected.
Consider a vulnerable service in a company's cloud account. A list of software flaws alone may not show whether that service is running, reachable from outside or connected to sensitive information. Upwind's product description says it brings those signals together to help prioritize a response. It also looks for suspicious processes, network destinations and data movement, extending the job from finding exposures to detecting activity that could indicate an attack.
Upwind packages application security, configuration oversight and live protection in one enterprise platform. Its cloud-security page includes a testimonial from Nubank's security chief describing the value of context for remediation, while other customers discuss consolidating visibility across tools. Those are customer statements published by the vendor, not independent performance benchmarks. They nevertheless illustrate the buying problem: security leaders want fewer disconnected investigations and a clearer route from an alert to a useful fix.
According to CTech, Bessemer Venture Partners and TCV are leading the financing, with participation from Salesforce Ventures, Craft Ventures, Greylock and others. The report follows a $250 million Series B earlier this year. CTech says Amiram Shachar and his former Spot.io colleagues founded Upwind in 2022. Captables is treating the new amount and valuation as reported; the company materials reviewed did not provide a separate announcement confirming those terms.
Captables' read: Upwind's opportunity depends on making a growing security workload easier to manage, not simply identifying more things that could go wrong. Its broader platform could become more valuable as companies deploy additional cloud applications and AI systems. The commercial test is whether customers keep relying on it for decisions and remediation across those environments, beyond the initial inventory and demonstration.