deck.gl is an open-source JavaScript framework for visual exploration of large datasets. It renders layered visualisations on the GPU using WebGL2 and WebGPU, and developers can combine the existing layers or package their own as reusable ones. It works in plain JavaScript or with React, either on its own or on top of base map libraries such as MapLibre, Mapbox, ArcGIS or Google Maps. The project belongs to the vis.gl family of libraries and runs in the browser of whichever application embeds it.
The code is released under the MIT licence and the project is hosted by the OpenJS Foundation, a member-supported non-profit based in the United States. Because deck.gl is a library, there is no vendor-operated cloud: data stays inside the application and on the infrastructure of the organisation that uses it, so the library itself creates no hosting dependency. Sovereignty questions arise mainly from the map tiles, base maps and data services combined with it, which should be chosen separately. The source can be audited, forked and run entirely on your own infrastructure.