Best Kickstart CSS Alternatives & Competitors in 2024

Simple and flexible HTML, CSS, and JS for popular UI components and interactions.

Key Bootstrap features:

Responsive Design Pre-designed Components Cross-browser Compatibility Extensive Documentation

Open Source

BOOTFLAT is an open source Flat UI KIT based on Bootstrap CSS framework. And, for the designers, we offer a free PSD Download. It provides a faster, easier and less repetitive way for web developers or designers to create elegant web apps.

Kimp is an unlimited design company, specializing in graphic design (including print and digital designs, custom illustrations, landing page designs and email designs) and video design. .

Key Kimp features:

Easy to Set-up and use Free Trial

Try for free Free Trial $599.0 / Monthly

Metro UI CSS a set of styles to create a site with an interface similar to Windows 8.

Key Metro UI features:

Modern Aesthetic Responsive Design Ease of Use Customizable

Open Source

Susy: un-obtrusive grid system for designers, built on Compass and Sass.

A UI Component library implemented using a set of specifications designed around natural language.

Key Semantic UI features:

Intuitive Class Names Customizability Comprehensive Components Flexibility

Open Source

A lightweight and modular front-end framework for developing fast and powerful web interfaces.

Key UIKit features:

Modularity Extensive Documentation Responsive Design Customization

Open Source

JS-powered run-time CSS.

A modern responsive front-end framework based on Material Design.

Key Materialize CSS features:

Responsive Design Material Design Component Variety Customization

Open Source

A set of small, responsive CSS modules that you can use in every web project.

Key Purecss features:

Lightweight Responsive Modular Easy Integration

Open Source

A Beautiful Boilerplate for Responsive, Mobile-Friendly Development.

Key Skeleton CSS features:

Lightweight Simplicity Responsive Grid Clean Design

Open Source

Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.

Key Bulma features:

Simple and Elegant Design Responsive Layouts Ease of Use BEM Methodology

Open Source

A utility-first CSS framework for rapidly building custom user interfaces.

Key Tailwind CSS features:

Utility-First Approach Customization Consistent Design Responsive Design

Open Source

CSS toolkit and guidelines that power GitHub.

Key Primer features:

Consistency Open Source Responsive Design Comprehensive Documentation