# marimo

> marimo is a San Francisco company building an open-source reactive Python notebook that replaces the error-prone JSON of Jupyter with pure Python files. Cells form a dataflow graph, so changing one variable automatically re-runs the cells that depend on it - notebooks are reproducible, git-friendly, deployable as apps, executable as scripts, and can even run entirely in the browser via WebAssembly. Founded in 2022 by Akshay Agrawal and Myles Scolnick, marimo raised a $5M seed in 2024 and joined CoreWeave in October 2025 while keeping the notebook free and permissively licensed.

- **Founded:** 2022
- **Headquarters:** San Francisco, California, United States
- **Founders:** Akshay Agrawal (Co-Founder & CEO), Myles Scolnick (Co-Founder & CTO)
- **Team size:** ~8-11 employees
- **Products:** marimo notebook, Notebook as app / script, WebAssembly notebooks, molab
- **Notable:** Raised $5M seed from an unusually deep bench of data and AI luminaries (Jeff Dean, Wes McKinney, Clement Delangue)., Grew to over 1M monthly downloads and 16k+ GitHub stars with ~200 contributors., Featured in Nature.

## Products & services

- **marimo notebook** — An open-source reactive Python notebook stored as a pure .py file. Its reactive engine tracks dependencies between cells and re-runs only what changed, eliminating hidden state and making notebooks reproducible and git-friendly.
- **Notebook as app / script** — The same marimo file can be executed as a standalone Python script or deployed as an interactive web app with UI widgets, sliders, and SQL cells - no rewrite required.
- **WebAssembly notebooks** — marimo notebooks run entirely in the browser via WebAssembly and Pyodide, with no Python install and no backend server needed.
- **molab** — A free cloud-hosted marimo environment offering generous CPU and RAM (4 CPUs, 32GB RAM by default) with optional NVIDIA RTX Pro 6000 Blackwell GPUs, now powered by CoreWeave infrastructure.

## Achievements

- Raised $5M seed from an unusually deep bench of data and AI luminaries (Jeff Dean, Wes McKinney, Clement Delangue).
- Grew to over 1M monthly downloads and 16k+ GitHub stars with ~200 contributors.
- Featured in Nature.
- Shipped a fully in-browser Python notebook via WebAssembly/Pyodide.
- Joined CoreWeave in 2025 while keeping the core product free and open-source.

## Latest updates

- **2025-10** — marimo joined CoreWeave to scale molab with GPU compute, keeping the notebook open-source; the ~8-person team stayed intact.
- **2024-11** — Announced Marimo Inc. and a $5M seed round led by AIX Ventures with a roster of angel investors from Google, Hugging Face, and the PyData community.

## Links

- Website: https://marimo.io
- LinkedIn: https://www.linkedin.com/company/marimo-io
- Twitter/X: https://twitter.com/marimo_io
- GitHub: https://github.com/marimo-team/marimo
- YouTube: https://www.youtube.com/@marimo-team

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Profile page: https://yespress.io/marimo
Published by YesPress — https://yespress.io
Last updated: 2026-08-04