What is the best alternative to W3.CSS?

By number of websites, the most widely used alternatives to W3.CSS are Bootstrap, Animate.css, Normalize.css, Foundation, Tailwind CSS. The right one depends on your needs; compare them on adoption, authority, and audience above.

How many alternatives to W3.CSS are there?

Site Stats Database tracks 28 other ui & css frameworks used by 100 or more websites, plus a long tail of rarer ones. W3.CSS itself is used by 1,051 websites.

Which UI / CSS framework has the most websites?

Bootstrap leads this category with 126,851 websites in our catalog.

Where does this data come from?

Adoption is counted from Site Stats Database's own crawl; authority (Ahrefs Domain Rating) and traffic come from Ahrefs and DataForSEO. Everything reflects the sites we track and refreshes at least monthly.

W3.CSS Alternatives & Competitors

Last updated July 1, 2026 · refreshes automatically as new data lands.

Looking for an alternative to W3.CSS? Site Stats Database tracks 28 other ui & css frameworks; the top ones are below, ranked by adoption, with authority and traffic for each and the leading sites that use them. W3.CSS itself is used by 1,051 websites. Back to W3.CSS.

UI Framework	Websites	Share	Median DR	Median traffic	Compare
W3.CSS (this page)

The top W3.CSS alternatives in depth

Bootstrap

#1 in UI & CSS Frameworks · 126,851 websites

Bootstrap is a popular front-end CSS framework for responsive layouts and prebuilt components. Originally from Twitter, it lets developers assemble consistent, mobile-friendly interfaces quickly. It remains one of the most common UI frameworks on the web.

126,851

Websites

61.9%

Share of UI Framework

Median DR

4,520

Median traffic

Top sites using Bootstrap

merriam-webster.com rapidtables.com bbc.com bestbuy.com nps.gov

Compare W3.CSS vs Bootstrap →See all Bootstrap sites →

Animate.css

#2 in UI & CSS Frameworks · 47,649 websites

Animate.css is a library of ready-to-use CSS animations.

47,649

Websites

23.2%

Share of UI Framework

Median DR

3,603

Median traffic

Top sites using Animate.css

cdc.gov renehersecycles.com mondaymandala.com un.org

Normalize.css

#3 in UI & CSS Frameworks · 15,704 websites

Normalize.css makes browsers render elements more consistently as a CSS reset alternative.

15,704

Websites

7.7%

Share of UI Framework

Median DR

6,707

Median traffic

Top sites using Normalize.css

webmd.com yourdictionary.com 100daysofrealfood.com mybib.com

Foundation

#4 in UI & CSS Frameworks · 8,731 websites

Foundation is a responsive front-end CSS framework.

8,731

Websites

4.3%

Share of UI Framework

Median DR

5,619

Median traffic

Top sites using Foundation

patriots.com uhaul.com nyctourism.com uber.com

Tailwind CSS

#5 in UI & CSS Frameworks · 7,759 websites

Tailwind CSS is a utility-first CSS framework for building designs directly in markup. Instead of writing custom stylesheets, developers compose small utility classes, which speeds up consistent UI work. It has become a default styling choice for many modern React and Vue projects.

7,759

Websites

3.8%

Share of UI Framework

Median DR

4,340

Median traffic

Top sites using Tailwind CSS