CoreWeave has entered into a definitive agreement to acquire Marimo Inc., the creator of the open‑source Marimo notebook, an AI‑native reactive development environment for Python.
The acquisition adds Marimo’s notebook platform to CoreWeave’s purpose‑built AI cloud platform, allowing developers to accelerate model training and experimentation within a unified workflow.
CoreWeave’s recent growth has been driven by high demand for GPU compute, with second‑quarter 2025 revenue of $1.21 billion, up 207% year‑over‑year, and adjusted EBITDA of $753 million, a 62% margin. The company went public on Nasdaq in March 2025, was valued at $23 billion in 2024, and is projected to generate $3.52 billion in revenue for 2025. It has secured a five‑year cloud computing contract with OpenAI worth approximately $12 billion.
The acquisition aligns with CoreWeave’s strategy to become the “Essential Cloud for AI” by integrating compute infrastructure with MLOps and development tools, following prior acquisitions of OpenPipe and Weights & Biases.
Marimo’s open‑source notebook offers reactive execution, pure Python files for Git integration, and built‑in AI assistance, addressing limitations of traditional notebooks such as hidden state and manual re‑runs.
CoreWeave competes with hyperscalers like AWS, Google Cloud, and Microsoft Azure, as well as specialized GPU cloud providers such as Lambda Labs, RunPod, and DigitalOcean. By adding Marimo, CoreWeave strengthens its competitive position by offering a specialized, unified workflow for AI developers.
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