marimo

A reactive Python notebook that runs as a script, shares as an app, and stores as Git-friendly code.

marimo.io

Verified ~4.1k monthly visits

Quick facts
What is it	A reactive Python notebook that runs as a script, shares as an app, and stores as Git-friendly code.
Pricing	Unknown
Platform	Web Application
Best for	exploratory data analysis and visualization, prototyping machine learning models
Domain registered	2022

Data updated Aug. 1, 2026

What does marimo do?

marimo is a Python notebook environment designed to fix common frustrations with traditional tools like Jupyter. It works as a reactive notebook where changing a cell's code or value automatically triggers updates in all dependent cells, keeping the entire notebook's state consistent. The notebooks themselves are stored as plain Python (.py) files, which makes them easy to version control with Git, run as standard scripts, or reuse as modules. You can also add interactive elements like sliders and dropdowns directly into the notebook and share the final result as a standalone web app.

What sets marimo apart is its focus on reproducibility and developer experience. It executes cells in a deterministic order with no hidden state, so deleting a cell also removes its variables and updates the rest of the notebook correctly. It includes features like a VS Code extension, a CLI, built-in SQL cells for querying databases, and an AI-native editor that supports code completion and chat assistance using various models. It's fully open-source and integrates with standard Python tooling.

This tool is ideal for data scientists, researchers, and developers who work with data analysis, model training, or building internal tools. It's particularly useful for projects where you need to combine exploratory coding with creating a shareable, interactive application, all while maintaining clean, reproducible code that plays nicely with version control systems.

Development — Other

#ai code assistant#data science#git-friendly#open source#python-notebook#reactive programming#web app

Key features

What makes it stand out

Reactive execution automatically updates dependent cells when code changes

Built-in interactive UI elements like sliders, dropdowns, and dataframes

Notebooks are pure Python files, making them versionable with Git

Share notebooks as interactive web apps or run them as scripts

AI-native editor with copilot support and context-aware chat

Who is marimo for?

Who benefits most from this tool

exploratory data analysis and visualization

prototyping machine learning models

creating interactive data dashboards and tools

Trust & presence

Domain Domain registered 2022

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