Upwind Raises $400M at $3.8B Valuation

Upwind rejects Datadog's $4B buyout bid after raising $400M at $3.8B valuation.

Oct 28, 2026

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Upwind Raises $400M at $3.8B Valuation

Upwind rejects Datadog's $4B buyout bid after raising $400M at $3.8B valuation.

In brief

Upwind rejects Datadog's $4B buyout bid after raising $400M at $3.8B valuation. Upwind, a cloud and AI security startup, raised $400 million in Series C funding at $3.8 billion valuation, rejecting Datadog's $4 billion acquisition offer. Originally reported by Dealroom.

Quick answers

What's the deal?
Upwind, a San Francisco- and Israel-based cloud and AI security startup, raised $400 million in a Series C round led by Bessemer Venture Partners at a $3.8 billion valuation.
Why now?
The round lands less than nine months after Upwind's $250 million Series B, which valued it at $1.5 billion in January 2026.
What could go wrong?
Upwind rejected a roughly $4 billion acquisition offer from Datadog, betting its value will climb further.
What is the key takeaway from Upwind Raises $400M at $3.8B Valuation?
Upwind, a cloud and AI security startup, raised $400 million in Series C funding at $3.8 billion valuation, rejecting Datadog's $4 billion acquisition offer.

What's the deal?

Upwind, a San Francisco- and Israel-based cloud and AI security startup, raised $400 million in a Series C round led by Bessemer Venture Partners at a $3.8 billion valuation.

Why now?

The round lands less than nine months after Upwind's $250 million Series B, which valued it at $1.5 billion in January 2026.

What could go wrong?

What could go wrong?

Upwind rejected a roughly $4 billion acquisition offer from Datadog, betting its value will climb further.

The key point

Upwind, a cloud and AI security startup, raised $400 million in Series C funding at $3.8 billion valuation, rejecting Datadog's $4 billion acquisition offer.

Read the original on Dealroom

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