ArcGIS API for JavaScript vs. TerriaJS
Take a look at this side-by-side comparison of ArcGIS API for JavaScript and TerriaJS.
At a Glance
ArcGIS API for JavaScript
About ArcGIS API for JavaScript
ArcGIS API for JavaScript is a tool used to embed maps and tasks in web applications.
TerriaJS
About TerriaJS
TerriaJS is an open-source framework for web-based geospatial catalogue explorers.