# Foundation, release history and use on real websites. A responsive frontend framework by ZURB with an advanced grid system and accessibility features. Once the main competitor to Bootstrap for enterprise projects. Development is minimal and the community has significantly shrunk. - **Status:** Legacy. Minimal development since 2020, migration to a modern alternative is recommended. - **Category:** [JS/CSS Frameworks](https://be1st.ai/technologies/framework) - **First release:** 2011 - **License:** MIT - **Latest version:** 6.9.0 (27 Sep 2024) - **Official website:** https://get.foundation - **Documentation:** https://get.foundation/sites/docs/ - **GitHub:** https://github.com/foundation/foundation-sites - **Page:** https://be1st.ai/technologies/framework/foundation ## Foundation on audited websites 111 of the 16,845 websites audited by be1st run Foundation (<1%). That ranks it #27 of the 35 technologies in JS/CSS Frameworks we have seen in audits. ### Websites running Foundation vs all websites - **Web score:** 72 (all websites 72) - **SEO:** 80 (all websites 79) - **Security:** 60 (all websites 59) - **Performance:** 67 (all websites 72) - **AI Readiness:** 34 (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. ## Foundation versions and release history 2 release lines since 2015, as listed by the npm registry. The latest version is 6.9.0, released 27 Sep 2024. | Version | Released | Latest release | Releases | | --- | --- | --- | --- | | 6 | 19 Nov 2015 | 6.9.0 (27 Sep 2024) | 37 | | 5 | 30 Apr 2015 | 5.5.3 (6 Oct 2015) | 2 | Sources: [npm registry, package foundation-sites](https://www.npmjs.com/package/foundation-sites), 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 Foundation ### What is Foundation? A responsive frontend framework by ZURB with an advanced grid system and accessibility features. Once the main competitor to Bootstrap for enterprise projects. Development is minimal and the community has significantly shrunk. The be1st catalog lists Foundation under JS/CSS Frameworks. License of Foundation: MIT. ### What is the latest version of Foundation? The latest version of Foundation is 6.9.0, released 27 Sep 2024 (source: npm registry, package foundation-sites). ### How many websites use Foundation? 111 of the 16,845 websites audited by be1st run Foundation (<1%), as of 8 Nov 2026. ### When was Foundation first released? Foundation was first released in 2011; the oldest version listed by the npm registry dates from 2015. ### Is Foundation still a modern choice? Not for new projects. Foundation counts as legacy. Minimal development since 2020, migration to a modern alternative is recommended. ### What are the alternatives to Foundation? Technologies that do the same job as Foundation include Tailwind CSS, Bootstrap, and Bulma. Numbers: latest audit of each of 16,845 websites audited by be1st, as of 8 Nov 2026.