marimo
Open-source, AI-native notebook acquired in October 2025.
What it is
An open-source notebook environment for data and AI work. CoreWeave acquired it to add a developer-facing tool to its software portfolio.
Why it matters to the stock. It is a small line for now, but it adds an open-source developer funnel that can lead to paid cloud and software use.
News
CoreWeave launches Forge, combining Weights & Biases, OpenPipe and marimo
CoreWeave launched Forge, a development platform that merges Weights & Biases Models, OpenPipe post-training and the open-source marimo notebook project.
Product