io.js vs Volt: What are the differences?

Developers describe io.js as "A friendly fork of Node.js with an open governance model". io.js is a JavaScript platform built on Chrome's V8 runtime. This project began as a fork of Joyent's Node.js and is compatible with the npm ecosystem. On the other hand, Volt is detailed as "A ruby web framework where your ruby runs on both server and client". Volt is a ruby web framework where your ruby code runs on both the server and the client (via opal.) The DOM automatically update as the user interacts with the page. Page state can be stored in the URL, if the user hits a URL directly, the HTML will first be rendered on the server for faster load times and easier indexing by search engines.

io.js and Volt can be categorized as "Frameworks (Full Stack)" tools.

"Compatible with NPM" is the primary reason why developers consider io.js over the competitors, whereas "Handlebars" was stated as the key factor in picking Volt.

Volt is an open source tool with 3.3K GitHub stars and 209 GitHub forks. Here's a link to Volt's open source repository on GitHub.