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**CoreWeave in Talks to Buy AI Startup Weights & Biases For Around $1.7 Billion**

By Stephanie Palazzolo, Anissa Gardizy, and Natasha Mascarenhas

Mar 4, 2025, 3:53pm PST

CoreWeave, which provides cloud servers to large companies developing artificial intelligence, is in talks to acquire Weights & Biases, a startup that helps developers build AI applications, for around $1.7 billion, according to two people who spoke to executives at Weights & Biases. The deal could help CoreWeave diversify its base of customers ahead of its initial public offering.

CoreWeave primarily generates revenue from large customers such as Microsoft, which is also a competitor, as well as Meta Platforms and Nvidia. (The companies confirmed the deal after this article was published, but didn't disclose a price.) CoreWeave is preparing for one of the most anticipated IPOs of the year and could end up with a public market valuation north of $20 billion. However, its concentrated customer base prompted its investors to debate how long the company's growth will continue, especially if some of its customers decide to increasingly use their own servers rather than renting them from cloud providers.

Weights & Biases' paid tools, which start at $50 per month for professionals, have attracted data scientists from various industries, including pharmaceuticals and medical imaging firms. Its more than 900,000 users hail from companies including OpenAI, Siemens, and Salesforce, according to its website. Weights & Biases competes with major cloud providers and other AI-focused firms such as Databricks and Hugging Face, which sell similar tools to developers. Weights and biases are common terms in the AI field, referring to the ways in which data scientists can manipulate or influence a machine learning model they are developing.

Weights & Biases' revenue couldn't be learned, but it was generating relatively little when it raised capital at a roughly $1 billion valuation in 2021. A 2023 financing valued it at $1.25 billion. The company started in 2018 and previously raised $250 million in funding from investors including Coatue Management, Insight Partners, and Felicis, according to the Generative AI Database.

CoreWeave last year generated $1.9 billion in revenue, eight times more than it generated in 2023, thanks in large part to multi-year deals it struck with Microsoft. As of the end of 2024, it had $1.4 billion in cash and cash equivalents, according to a filing, which means it might need to finance the acquisition or use equity for some or all of it.

A spokesperson for CoreWeave did not immediately respond to a request for comment. Weights & Biases CEO Lukas Biewald couldn't immediately be reached.

This article was updated to reflect the companies' confirmation of a deal.

Stephanie Palazzolo is a reporter at The Information covering artificial intelligence. She previously worked at Business Insider covering AI and at Morgan Stanley as an investment banker. Based in New York, she can be reached at stephanie@theinformation.com or on Twitter at @steph_palazzolo.

Anissa Gardizy is a reporter at The Information covering cloud computing. She was previously a tech reporter at The Boston Globe. Anissa is based in San Francisco and can be reached at anissa@theinformation.com or on Twitter at @anissagardizy8.

Natasha Mascarenhas is a reporter at The Information, based in San Francisco, who covers venture capital and startups. She can be reached at natasha@theinformation.com, or on Signal at +1 925 271 0912. She is on Twitter at @nmasc_.