From Dealroom · · 50s
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?

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.





