Library / SDK
CodingApps & UIs
Marimo
1Reactive 2Python 3notebooks 4deployable 5as 6apps
the six Ws · specification
W1
Who
Data scientists and researchers who want reproducible, git-friendly notebooks.
W2
What
Marimo is a reactive Python notebook that stores notebooks as plain Python files and automatically re-runs dependent cells.
W3
Where
Runs locally or self-hosted, and notebooks can be deployed as standalone web apps or command line scripts.
W4
When
Actively developed with over 22,000 GitHub stars and thousands of commits into 2026.
W5
Why
Solves reproducibility and versioning problems common in traditional JSON based Jupyter notebooks.
W6
With
Compatible with the broader Python data science stack and deployable via its own app server or as scripts.
W7
Watch
Apache 2.0 open source and fully self-hosted, with an optional marimo cloud offering for hosted notebooks.
alternatives