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Marimo
AICores
Open-source reactive Python notebook with auto-updating cells.
The Jupyter killer nobody asked for but everyone needed. Reactive cells, pure .py files, and web app deployment — all free and open source.
What's great
- Reactive auto-updating cells
- Pure .py file format
- Deployable as web apps
Watch out for
- Python-only
- Smaller ecosystem than Jupyter
- Fewer extensions
Quick Facts
PricingFree
Free tierNo
PlatformsWeb
APINot available
CategoryDeveloper Tools
Q: What is Marimo?
Marimo is an open-source Python notebook where cells auto-update when dependencies change — no stale state. Stored as pure.
Q: How much does Marimo cost?
Marimo is free to use.
Q: Who is Marimo best for?
Marimo is best for data scientists and ml engineers who want reproducible notebooks without jupyter's stale state..
Q: Is Marimo free?
Yes, Marimo is completely free and open source.
Best for
Data scientists and ML engineers who want reproducible notebooks without Jupyter's stale state.
Not ideal for
Non-Python users or those deeply invested in the Jupyter ecosystem.
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AICores Editorial Review
Reviewed by AICores Editorial Team
Last updated: May 2026
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