Leaflet: The lightweight open-source JavaScript library for interactive maps. Observable: Data notebooks and dashboards with D3 and Plot maps.
| Leaflet | 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 | BSD-2-Clause | — |
| API | — | — |
| Platforms | JavaScript | Web, JavaScript |
| Made by | — | — |
| Commercial use | Allowed | Check terms |
| Export / print images | Allowed | Check terms |
| Offline / caching | Allowed | Check terms |
| Visits from MapTools | 4 | 2 |
| Visit | Visit |
Leaflet features
- Raster tile layers
- Markers, popups, vectors and GeoJSON
- Hundreds of plugins
- Tiny footprint
The library is free. The tiles you load keep their provider's terms.
Leaflet alternativesObservable 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.