| Website | marimo.io |
| Category | Data Science / Notebooks |
| License | Apache 2.0 (open source) |
| Pricing | Free (open source) |
Overview
Marimo is a reactive Python notebook. Automatic dependency tracking, reproducible execution, Git-friendly format. The notebook that fixes Jupyter's problems.
Pros
- Apache 2.0 license
- Reactive execution (no stale cells)
- Git-friendly (.py files)
- Interactive UI elements
- Reproducible by design
- Fast and lightweight
Cons
- Jupyter ecosystem compatibility
- Fewer extensions
- Learning curve from Jupyter
- Some libraries don't render
- Newer project
Verdict
Marimo fixes the fundamental problems with Jupyter notebooks. Cells are reactive — change one and dependent cells automatically update, eliminating stale state. Notebooks are stored as .py files, making Git diffs meaningful. Execution is always reproducible because Marimo tracks dependencies. For data scientists tired of 'restart kernel and run all', Marimo is the upgrade.