Best for Cross-Platform Desktop + Web / Cloud Integration Tools for building desktop apps that can connect to online APIs, cloud services, and remote databases. Aspect Electron Flutter .NET MAUI Qt Primary Language JavaScript / TypeScript Dart C# C++ / QML Target Desktop OS Windows, macOS, Linux Windows, macOS, Linux Windows, macOS Windows, macOS, Linux Web / Cloud Integration Excellent (native web stack) Very good Very good Very good HTTP / REST APIs fetch, axios, Node.js http, Dio, GraphQL HttpClient, REST, gRPC Qt Network Real-time Support WebSocket, Socket.IO WebSocket built-in SignalR, WebSocket Qt WebSockets ...