Grunt.js

vs

Yarn

A toolkit to automate & enhance your workflow. Leverage gulp and the flexibility of JavaScript to automate slow, repetitive workflows and compose them into efficient build pipelines.

Bower provides hooks to facilitate using packages in your tools and development workflows. With Bower, you can optimize and build front-end code to follow the flat dependency graph and to help reduce page load. Bower is released free and open-source under the 

Rome is a free and open-source JavaScript build tool that has strong conventions and aims to have minimal configuration. The toolset includes a linter, compiler and bundler for JavaScript, TypeScript, JSON, HTML, Markdown, and CSS. Rome has zero dependencies, and has largely been written from scratch by people from Facebook.

Snowpack enables frontend developers to enjoy a lightning-fast development experience. It's modern build tool that replaces heavier, more complex bundlers like Webpack or Parcel in your development workflow. Snowpack leverages JavaScript's native module system to increase performance and never builds the same file twice. Allowing you to enjoy a near instant hot module reload and refresh no matter how big your project grows. Snowpack supports JSX, TypeScript, React, Preact, CSS Modules and much more, while also provding an extensive plugin catalog with support for almost any technology in the JavaScript eco-system.

Webpack is an open-source module bundler for JavaScript. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset. It can transform front-end assets like HTML, CSS, and images where corresponding loaders ar included and takes modules with dependencies and generates static assets representing those modules.