Swift

Swift is a modern language with strong type safety, value semantics, and performance that competes with C++. The compiler catches entire categories of bugs — optionals force null handling, structs prevent unintended mutation, and the protocol system enables clean abstractions.

For Apple platforms, there is no alternative. iOS, macOS, watchOS, and visionOS development all start with Swift. The language has also matured for server-side use with Vapor and Swift on Server, though TypeScript remains more practical for backend work. Where Swift excels is native application development — the integration with Apple's frameworks is seamless and the performance is native.