CoreWeave Inc. said on Friday it has reached a definitive agreement to acquire Marimo Inc., the company behind open-source marimo notebook, a reactive Python development environment designed specifically for artificial intelligence (AI) and data applications.
The acquisition marks the latest in a series of strategic moves by CoreWeave to build what it calls “the most complete environment for AI development.”
Financial terms were not disclosed.
The cloud infrastructure provider plans to integrate Marimo’s technology into its platform, creating a unified developer experience spanning the entire AI lifecycle from training to deployment.
Marimo’s flagship product offers developers a fully reproducible, Git-friendly programming environment that bridges the gap between initial experimentation and large-scale production use. Once integrated, the technology would presumably enhance CoreWeave’s cloud-hosted notebook offering and work alongside the company’s existing Weights & Biases developer platform.
“This is about supporting the open-source community and unlocking the pace of innovation that modern AI demands,” Brian Venturo, CoreWeave’s co-founder and chief strategy officer, said in a news release. “We are giving builders the tools to iterate faster and deploy smarter across every stage of the AI lifecycle.”
Marimo CEO Akshay Agrawal said the acquisition will allow the company to execute its vision at greater scale. “We created marimo because we believed that Python developers deserved a dramatically better programming environment for working with data,” Agrawal said. “Our shared goal is to build the world’s best programming environment for AI and data work.”
CoreWeave emphasized its commitment to maintaining Marimo as an open-source project. The marimo notebook will remain freely available under a permissive license, with development guided by community collaboration.
The acquisition follows several recent deals that have expanded CoreWeave’s capabilities. Earlier this month, the company announced plans to acquire Monolith AI, which specializes in applying machine learning to physics and engineering problems. CoreWeave also recently acquired OpenPipe for its reinforcement learning tools and Weights & Biases in May to create an integrated AI developer platform combining compute infrastructure with machine learning operations tools.
The acquisition comes after shareholders of data center infrastructure provider Core Scientific rejected a $9 billion acquisition offer by CoreWeave.
Core Scientific will continue to operate independently as a publicly listed entity. The all-stock deal was announced in July.
