# Semantic UI, release history and use on real websites.

A CSS framework with class names in natural language (for example "ui primary button"). It ships a large set of components and themes.

- **Status:** Legacy. Development has stalled; the community fork Fomantic UI continues.
- **Category:** [JS/CSS Frameworks](https://be1st.ai/technologies/framework)
- **First release:** 2013
- **License:** MIT
- **Latest version:** 2.5.0 (6 Oct 2022)
- **Official website:** https://semantic-ui.com
- **GitHub:** https://github.com/Semantic-Org/Semantic-UI
- **Page:** https://be1st.ai/technologies/framework/semantic-ui

## Semantic UI on audited websites

118 of the 16,845 websites audited by be1st run Semantic UI (<1%). That ranks it #26 of the 35 technologies in JS/CSS Frameworks we have seen in audits.

### Websites running Semantic UI vs all websites

- **Web score:** 64 (all websites 72)
- **SEO:** 71 (all websites 79)
- **Security:** 51 (all websites 59)
- **Performance:** 61 (all websites 72)
- **AI Readiness:** 27 (all websites 31)

### Most used in JS/CSS Frameworks

1. [Tailwind CSS](https://be1st.ai/technologies/framework/tailwind-css): 34% (5,653)
2. [jQuery](https://be1st.ai/technologies/framework/jquery): 29% (4,883)
3. [Next.js](https://be1st.ai/technologies/framework/next-js): 23% (3,836)
4. [React](https://be1st.ai/technologies/framework/react): 22% (3,626)
5. [Bootstrap](https://be1st.ai/technologies/framework/bootstrap): 13% (2,198)
6. [PHP](https://be1st.ai/technologies/framework/php): 3.0% (502)
7. [Lit](https://be1st.ai/technologies/framework/lit): 2.9% (487)
8. [Astro](https://be1st.ai/technologies/framework/astro): 2.4% (405)
9. [Vue.js](https://be1st.ai/technologies/framework/vue-js): 2.2% (373)
10. [Alpine.js](https://be1st.ai/technologies/framework/alpine-js): 2.0% (341)

The number for React counts only websites where Tech Stack detects it directly, not websites built with Next.js, Gatsby, and Remix, which run it too. The number for Vue.js counts only websites where Tech Stack detects it directly, not websites built with Nuxt, which run it too.

## Semantic UI versions and release history

3 release lines since 2014, as listed by the npm registry. The latest version is 2.5.0, released 6 Oct 2022.

| Version | Released | Latest release | Releases |
| --- | --- | --- | --- |
| 2 | 1 Jul 2015 | 2.5.0 (6 Oct 2022) | 41 |
| 1 | 28 Nov 2014 | 1.12.3 (20 May 2015) | 41 |
| 0.x (before 1.0) | 25 Jun 2014 | 0.19.3 (15 Sep 2014) | 2 |

Sources: [npm registry, package semantic-ui](https://www.npmjs.com/package/semantic-ui), checked 8 Nov 2026.

## Other technologies in JS/CSS Frameworks

- [TanStack Start](https://be1st.ai/technologies/framework/tanstack-start): 1.9% of websites
- [Nette](https://be1st.ai/technologies/framework/nette): 1.8% of websites
- [Nuxt](https://be1st.ai/technologies/framework/nuxt): 1.5% of websites
- [Angular](https://be1st.ai/technologies/framework/angular): 1.2% of websites
- [Preact](https://be1st.ai/technologies/framework/preact): 1.2% of websites
- [UnoCSS](https://be1st.ai/technologies/framework/unocss): 1.2% of websites
- [Express](https://be1st.ai/technologies/framework/express): 1.1% of websites
- [SvelteKit](https://be1st.ai/technologies/framework/sveltekit): 1.1% of websites
- [ASP.NET](https://be1st.ai/technologies/framework/asp-net): 1.0% of websites
- [Django](https://be1st.ai/technologies/framework/django): <1% of websites
- [HTMX](https://be1st.ai/technologies/framework/htmx): <1% of websites
- [Turbo (Hotwire)](https://be1st.ai/technologies/framework/turbo): <1% of websites

[All 38 in JS/CSS Frameworks](https://be1st.ai/technologies/framework)

## Questions about Semantic UI

### What is Semantic UI?

A CSS framework with class names in natural language (for example "ui primary button"). It ships a large set of components and themes. The be1st catalog lists Semantic UI under JS/CSS Frameworks. License of Semantic UI: MIT.

### What is the latest version of Semantic UI?

The latest version of Semantic UI is 2.5.0, released 6 Oct 2022 (source: npm registry, package semantic-ui).

### How many websites use Semantic UI?

118 of the 16,845 websites audited by be1st run Semantic UI (<1%), as of 8 Nov 2026.

### When was Semantic UI first released?

Semantic UI was first released in 2013; the oldest version listed by the npm registry dates from 2014.

### Is Semantic UI still a modern choice?

Not for new projects. Semantic UI counts as legacy. Development has stalled; the community fork Fomantic UI continues.

### What are the alternatives to Semantic UI?

Technologies that do the same job as Semantic UI include Bootstrap, Bulma, and Foundation.

Numbers: latest audit of each of 16,845 websites audited by be1st, as of 8 Nov 2026.