---
title: "AI and cloud cybersecurity startup Upwind Security raised $400M led by Bessemer at a $3.8B valuation, up from $1.5B in January, for $830M in total funding (Marissa Newman/Bloomberg)"
type: signal
url: https://frontiernewswire.com/s/ai-and-cloud-cybersecurity-startup-upwind-security-raised-400m-led-by-ec909d23
published: 2026-10-28T11:25:01.000Z
byline: "Source: TECHMEME"
---

# AI and cloud cybersecurity startup Upwind Security raised $400M led by Bessemer at a $3.8B valuation, up from $1.5B in January, for $830M in total funding (Marissa Newman/Bloomberg)

Source: TECHMEME · Published 2026-10-28 · Canonical: https://frontiernewswire.com/s/ai-and-cloud-cybersecurity-startup-upwind-security-raised-400m-led-by-ec909d23

Marissa Newman / Bloomberg : AI and cloud cybersecurity startup Upwind Security raised $400M led by Bessemer at a $3.8B valuation, up from $1.5B in January, for $830M in total funding — Upwind Security, a San Francisco-based startup offering cybersecurity for artificial intelligence and cloud applications …

## Sources

- [Read the original at TECHMEME](https://www.techmeme.com/261028/p18#a261028p18)

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