CoreWeave Acquires Marimo to Streamline AI Developer Workflow

AI cloud leader CoreWeave announced a definitive agreement to acquire Marimo Inc., creator of the open-source marimo notebook—an AI-native, reactive development environment built for Python and data workflows.

Last month, CoreWeave announced its plan to acquire U.K.-based Monolith AI Limited, a leader in using artificial intelligence and machine learning to solve complex physics and engineering problems.

CoreWeave said the move brings together its high-performance infrastructure with Marimo’s developer tools to accelerate AI model development and deployment.

The acquisition integrates Marimo’s technology into the CoreWeave Cloud to offer a unified developer experience spanning model training, inference, data movement, and continuous iteration.

“This is about supporting the open-source community and unlocking the pace of innovation that modern AI demands,” said Brian Venturo, co-founder and Chief Strategy Officer of CoreWeave. “With Marimo as part of our platform, we are giving builders the tools to iterate faster and deploy smarter across every stage of the AI lifecycle.”

Marimo’s CEO, Akshay Agrawal, added: “We created marimo because we believed Python developers deserved a dramatically better programming environment for working with data… Joining CoreWeave lets us double down on that vision and execute it at an even greater scale.”

The acquisition complements a string of strategic moves by CoreWeave this year, following earlier deals such as the acquisition of Weights & Biases and OpenPipe. The terms of the Marimo deal were not disclosed.

Earlier this year, CoreWeave also announced a definitive agreement to acquire Core Scientific, one of North America’s largest Bitcoin miners, in a $1.6 billion all-stock deal.

However, shareholders of Core Scientific have publicly rejected its proposed $9 billion, all-stock sale to CoreWeave, arguing the offer undervalued the company and exposed them to excessive risk amid volatile markets. Since then, CoreWeave has terminated the deal to acquire Core Scientific.

“We respect the views of Core Scientific stockholders and look forward to continuing our commercial partnership,” the company said in a statement.