What is Symfony?
FrameworkSymfony is a web framework: PHP framework for web projects. Tech Stack Detector identifies Symfony on any website by analysing HTTP response headers and cookies.
Symfony is a web framework (Framework). See websites using Symfony ↓
How Tech Stack Detector detects Symfony
Symfony is matched from these signals during a single, ordinary page request. Each one contributes to the confidence score shown on a scan.
- HeaderSymfony debug token header
- CookieSymfony cookie
Detecting Symfony also implies PHP.
Websites using Symfony
No websites in our public index are known to use Symfony yet. Scan a site above that uses it to be the first. Your result becomes a shareable /site/… page.
Alternatives to Symfony
Other Framework technologies Tech Stack Detector detects: popular alternatives and related tools, most-detected first.
Compare Symfony
Side-by-side comparisons of Symfony with other Framework technologies.
Popular technologies
The technologies most often detected across all websites scanned on Tech Stack Detector.
Frequently asked questions
What is Symfony?
Symfony is a web framework: PHP framework for web projects. Tech Stack Detector identifies Symfony on any website by analysing HTTP response headers and cookies. Its official website is https://symfony.com.
How can I tell if a website uses Symfony?
Enter any URL into Tech Stack Detector and it reports whether Symfony is present, with a confidence score and the exact evidence it matched. Detection is based on HTTP response headers and cookies. No login or crawling of the site is required.
What does detecting Symfony imply?
When Symfony is detected, Tech Stack Detector also infers PHP, because Symfony is built on top of it.
What are some alternatives to Symfony?
Other Framework technologies Tech Stack Detector detects include React, Next.js, Laravel, Astro, Vue.js and Nuxt. You can compare any of them side by side with Symfony.
Data last updated October 20, 2026 · based on 618 recently scanned websites.