Extism vs. Fermyon vs. JavaScript vs. WebAssembly Comparison Chart

Fermyon greatly reduces the hassle, complexity, and cost of building cloud applications by offering a complete WebAssembly-based execution environment with an associated easy-to-use web interface. Build and run microservices and web applications with WebAssembly. Get up and running within minutes with the Spin CLI. Easily compose apps from functions & components with Spin. Powerful versioning and release management with Bindle. Manage auto deploys and view logs through the web dashboard. Seamlessly run your WebAssembly services & containers side by side. We are building open-source, WebAssembly-powered cloud tools, with the aim of simplifying and unlocking new technologies for all. You can rapidly compose and run web apps and microservices with startup times measured in milliseconds instead of seconds, scale up or down almost instantly and execute in a secure, sandboxed environment. A faster, lighter way to run your services in the cloud, and to harness the power of WebAssembly.

WebAssembly (abbreviated Wasm) is a binary instruction format for a stack-based virtual machine. Wasm is designed as a portable compilation target for programming languages, enabling deployment on the web for client and server applications. The Wasm stack machine is designed to be encoded in a size- and load-time-efficient binary format. WebAssembly aims to execute at native speed by taking advantage of common hardware capabilities available on a wide range of platforms. WebAssembly describes a memory-safe, sandboxed execution environment that may even be implemented inside existing JavaScript virtual machines. When embedded in the web, WebAssembly will enforce the same-origin and permissions security policies of the browser. WebAssembly is designed to be pretty-printed in a textual format for debugging, testing, experimenting, optimizing, learning, teaching, and writing programs by hand. The textual format will be used when viewing the source of Wasm modules on the web.