Folium: Leaflet maps from Python. Observable: Data notebooks and dashboards with D3 and Plot maps.
| Folium | Observable | |
|---|---|---|
| Category | Map Libraries & SDKs | Geospatial Data Visualization |
| Pricing model | Open source | Freemium |
| Starts at | Free | See website |
| Free tier | — | Free for public notebooks |
| Open source | Yes | No |
| Software licence | MIT | — |
| API | — | — |
| Platforms | Python | Web, JavaScript |
| Made by | — | — |
| Commercial use | Allowed | Check terms |
| Export / print images | Allowed | Check terms |
| Offline / caching | Check terms | Check terms |
| Visits from MapTools | 1 | 2 |
| Visit | Visit |
Folium features
- Leaflet maps from Python
- Choropleths and heatmaps
- Jupyter integration
- HTML export
Observable features
- Reactive notebooks
- Observable Plot geo marks
- D3 projections
- Data apps framework
Summary based on public information. Check each provider's current pricing and terms.