WebAssembly Component Model: Composable Cross-Language Apps

The WebAssembly Component Model represents a paradigm shift in how we build and compose software. Imagine a world where you can combine code from Rust, Python, JavaScript, and Go into a single composable unit, with type safety, security boundaries, and zero runtime overhead. That world is arriving now, and it’s going to change everything about how we architect applications.

The Problem With Traditional WebAssembly

Standard WebAssembly has taken us far. We can compile C++, Rust, Go, and dozens of other languages to a portable binary format that runs anywhere—browsers, servers, edge computing platforms. But there’s a fundamental limitation: WebAssembly modules speak only through linear memory and numeric types.