Cloud security firm Upwind raises $400 million at $3.8 billion value

Upwind, a company that sells security software for cloud systems and AI tools, has raised $400 million at a $3.8 billion valuation. A valuation is the price investors put on a company in a funding round. In January 2026, Upwind was valued at $1.5 billion. The company says its revenue quadrupled in 2026.

What changed

The money came in a Series C round, a later stage of funding for a company that is already growing. Bessemer Venture Partners led it. Canapi Ventures joined, along with existing investors including Cyberstarts, Greylock Partners, Salesforce Ventures and TCV. Upwind says the funds will go to product development and to expanding how it sells to enterprise customers.

What Upwind does

The cloud means computing power and software that companies rent online instead of running on their own machines. Upwind watches what is happening inside those live systems. It says many older tools rely on periodic checks and snapshots instead. Its platform covers cloud workloads, APIs (the links that let software talk to other software) and AI agents (AI programs that act on their own).

• Works with Amazon Web Services, Microsoft Azure, Google Cloud and Oracle Cloud
• Available inside the AWS console through AWS Security Hub
• AWS customers get simpler setup and one bill through AWS

Why AI is part of the pitch

Upwind argues that AI raises the stakes on both sides. Attackers use AI to work at larger scale. Employees use AI models to build new apps. AI agents now operate inside companies on their own. Upwind says its own AI helpers can investigate threats without a person, act like a red team (a group that plays the attacker to test defenses), and fix problems in a company's systems very quickly.

Who uses it

Upwind says hundreds of organizations use it, including Siemens, Roku, Carvana, Nubank, Supabase and ClickUp. Security chiefs at HedgeServ and Ping are quoted in the announcement. One says setup took only days. Both say seeing live activity, not a snapshot, changed where their teams spend their time.

What to keep in mind

Nearly all the claims come from Upwind's own announcement. The release gives no revenue figures, only the fourfold growth. It does not list prices or say whether small businesses can use the product. The named customers are large organizations. For everyone else, the takeaway is the direction of the market. Businesses that rely on cloud services or AI tools should expect more security products that watch live activity and use AI helpers to respond.