Upwind, a San Francisco startup that uses AI to secure cloud infrastructure, has raised a $400 million Series C round at a $3.8 billion valuation led by Bessemer Ventures, with participation from existing backers including Greylock Partners and Craft Ventures. The round comes nine months after Upwind closed its previous $250 million financing at a $1.5 billion valuation . The fresh funding, which has been in the works for months, nearly fell apart after Datadog attempted to buy the company, acc…
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