What is Caddy?
ServerCaddy is a web server: Modern automatic HTTPS web server. Tech Stack Detector identifies Caddy on any website by analysing HTTP response headers.
Caddy is a web server (Server). See websites using Caddy ↓
How Tech Stack Detector detects Caddy
Caddy is matched from these signals during a single, ordinary page request. Each one contributes to the confidence score shown on a scan.
- HeaderServer header identifies Caddy
Websites using Caddy
No websites in our public index are known to use Caddy yet. Scan a site above that uses it to be the first. Your result becomes a shareable /site/… page.
Alternatives to Caddy
Other Server technologies Tech Stack Detector detects: popular alternatives and related tools, most-detected first.
Compare Caddy
Side-by-side comparisons of Caddy with other Server technologies.
Popular technologies
The technologies most often detected across all websites scanned on Tech Stack Detector.
Frequently asked questions
What is Caddy?
Caddy is a web server: Modern automatic HTTPS web server. Tech Stack Detector identifies Caddy on any website by analysing HTTP response headers. Its official website is https://caddyserver.com.
How can I tell if a website uses Caddy?
Enter any URL into Tech Stack Detector and it reports whether Caddy is present, with a confidence score and the exact evidence it matched. Detection is based on HTTP response headers. No login or crawling of the site is required.
What are some alternatives to Caddy?
Other Server technologies Tech Stack Detector detects include Nginx, LiteSpeed, Apache HTTP Server, Envoy, Microsoft IIS and OpenResty. You can compare any of them side by side with Caddy.
Data last updated October 20, 2026 · based on 618 recently scanned websites.