marimo

In plain words

marimo is an open-source Python and SQL notebook built for data work. It allows users to run reproducible experiments, track changes with git, share work as interactive web apps, and execute code as scripts. The notebook features a modern editor with AI capabilities, making it suitable for data scientists and developers who need version control and multiple ways to deploy their work.

written from the facts on this page · September 2026

From the sources

marimo is an open-source notebook for Python and SQL, designed from the ground up for working with data — run reproducible experiments, version with git, share as interactive web apps, and execute as scripts, all in a modern, AI-powered editor.

Explore data and build apps seamlessly with marimo, a next-generation Python notebook. Open source, reactive, and Git-friendly. Try it free in your browser.

🧪 We're running a cheminformatics notebook competition! Pick a dataset, build a notebook, & win a Mac Mini. Transform data, train models, and run SQL queries with marimo — feels like an AI-native reactive notebook, stored as Git-friendly reproducible Python. Seamlessly run as scripts and apps. All open source. Run one cell and marimo reacts by running affected cells , eliminating the error-prone chore of managing notebook state. For expensive notebooks, configure marimo to mark outputs as stale instead of autorunning. Built-in interactive elements like sliders, dropdowns, dataframe tables , and selectable plots make working with data feel fast, futuristic, and fun. marimo notebooks are…from marimo.io

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  Marimo – an open-source reactive notebook for Python2024 · github.com · ▲448

  Hi HN! We’re excited to share marimo, an open-source reactive notebook for Python [1]. marimo aims to solve well-known problems with traditional notebooks [2]: marimo notebooks are reproducible (no hidden state), git-friendly (stored as Python files), executable as Python scripts, and deployable as web apps. GitHub repo: https://github.com/marimo-team/marimo In marimo, a notebook’s code, outputs, and program state are always consistent. Run a cell and marimo reacts by automatically running the cells that reference its declared variables. Delete a cell and marimo scrubs…

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  WASM-powered codespaces for Python notebooks on GitHub2025 · docs.marimo.io · ▲204

  Hi HN! Last year, we shared marimo [1], an open-source reactive notebook for Python with support for execution through WebAssembly [2]. We wanted to share something new: you can now run marimo and Jupyter notebooks directly from GitHub in a Wasm-powered, codespace-like environment. What makes this powerful is that we mount the GitHub repository's contents as a filesystem in the notebook, making it really easy to share notebooks with data. All you need to do is prepend 'marimo.app' to any Python notebook on GitHub. Some examples: - Jupyter Notebook:…

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  Marimo – open-source reactive Python notebook – running in WASM2024 · marimo.app · ▲102

  Hi HN! Last month, we shared marimo [1][2], an open-source reactive notebook for Python. For those who missed it, marimo notebooks are reproducible, stored as Python files, executable as Python scripts, and deployable as web apps. It’s now possible to run marimo notebooks entirely in the browser via WebAssembly (WASM). - A marimo tutorial as a WASM notebook: https://marimo.app/l/c7h6pz - Training a neural network with Karpathy’s micrograd: https://marimo.app/l/xpd4te - Visualizing attractors, as a read-only app:…

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  Marimo pair – Reactive Python notebooks as environments for agentsApr 2026 · github.com · ▲140

  Hi HN! We're excited to share marimo pair [1] [2], a toolkit that drops AI agents into a running marimo notebook [3] session. This lets agents use marimo as working memory and a reactive Python runtime, while also making it easy for humans and agents to collaborate on computational research and data work. GitHub repo: https://github.com/marimo-team/marimo-pair Demo: https://www.youtube.com/watch?v=6uaqtchDnoc marimo pair is implemented as an agent skill. Connect your agent of choice to a running notebook with: /marimo-pair pair with me on…

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  Molab, a cloud-hosted Marimo notebook workspace2025 · molab.marimo.io · ▲123

  We launched marimo [1], an open-source reactive Python notebook, last year on HackerNews. Today, the most popular recent feature request in Google Colab’s issue tracker asks for marimo support in Colab [2]. Rather than try to convince Google to replace their notebook with marimo, we decided to just build our own cloud-hosted notebook service instead. We're calling this molab (mo for marimo), and we're launching it today. You can try it at https://molab.marimo.io Some features: - Persistent storage - Link sharing (notebooks are public but undiscoverable, like secret GitHub Gists) -…

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  Marimo VS Code extension – Python notebooks built on LSP and uvNov 2025 · github.com · ▲65

  Hi HN! We're excited to release our VS Code/Cursor extension for marimo [1], an open-source, reactive Python notebook. This extension provides a native experience for working with marimo notebooks, a long-requested feature that we’ve worked hard to get right. An LSP-first architecture The core of our extension is a marimo notebook language server (marimo-lsp [2]). As far as we know, it’s the first notebook runtime to take this approach. The Language Server Protocol (LSP) [3] offers a small but important set of notebook-related capabilities that we use for document and kernel syncing;…

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