CoreWeave completes acquisition of AI developer platform Weights & Biases

What CoreWeave announced

CoreWeave, Inc. (Nasdaq: CRWV) said it has finished buying Weights & Biases. The company had announced an agreement to acquire the business in early March. The press release is dated May 5, 2025, and describes the deal as a strategic combination that strengthens CoreWeave's ability to power AI innovation for the world's leading AI labs and enterprises.

Michael Intrator, co-founder and CEO of CoreWeave, said the deal builds on the company's recent IPO, "creating new vectors for growth and broadened capabilities as a combined company." CoreWeave completed its public listing on Nasdaq in March 2025, according to the release.

Intrator also praised the Weights & Biases team, citing its "relentless innovative spirit, customer obsession, and engineering excellence." He said these are traits CoreWeave has always prioritized as it enables AI builders in the inference era.

One platform from compute to evaluation

In a separate post, CoreWeave explains how it sees the two businesses fitting together. The company says its customers asked it to help them build and scale faster for the inference era, and that the combination is meant to do that.

According to CoreWeave, the unified platform will aim to improve efficiency and performance from compute through AI model training to the evaluation and monitoring of AI agents and applications. The company also expects that combined infrastructure and application observability insights will help builders simplify AI workflows and shorten time to market.

CoreWeave adds that the acquisition expands its customer base and gives it "actionable insight into AI's highest-impact uses across the industry."

Interoperability commitment

Both texts stress that the Weights & Biases platform will stay interoperable. CoreWeave says it remains committed so that customers can choose any deployment option, any infrastructure provider, and any foundation model, framework, or protocol. That is relevant for existing Weights & Biases users who do not run their workloads on CoreWeave infrastructure.

Lukas Biewald, co-founder of Weights & Biases, said he expects the combination to let his company better serve developers by "accelerating investment in the Weights & Biases platform, maintaining our commitment to interoperability, and unlocking new valuable features by combining the hardware and software layers of the new AI tech stack."

Advisors and what comes next

Evercore and Morgan Stanley acted as financial advisors to CoreWeave, with Davis Polk & Wardwell LLP as legal advisor. Qatalyst Partners advised Weights & Biases financially, and Orrick, Herrington & Sutcliffe LLP served as its legal advisor. The release does not disclose financial terms.

For customers, the stated plan is a tighter link between infrastructure and the tools used to build and monitor AI systems, while keeping the Weights & Biases platform open to other providers. CoreWeave's own forward-looking statements caution that results depend on factors such as its ability to integrate Weights & Biases' operations, realize the expected benefits in a timely manner, and deal with intense and increasing competition. The promised features and benefits are therefore plans, not delivered results.