Caddy
Caddy is a modern, open-source web server and reverse proxy written in Go, designed for simplicity, security, and automatic HTTPS. It automatically obtains and renews SSL/TLS certificates from Let's Encrypt, making it easy to deploy secure websites without manual configuration. It also supports HTTP/2, HTTP/3, and includes features like load balancing, caching, and a flexible configuration system via Caddyfile or JSON.
Developers should use Caddy when they need a lightweight, secure web server that simplifies HTTPS setup, especially for small to medium projects, static sites, or microservices. It's ideal for scenarios requiring automatic certificate management, such as rapid prototyping, development environments, or deployments where security and ease of use are priorities over advanced customization. Compared to traditional servers like Nginx or Apache, Caddy reduces operational overhead with its zero-config approach to TLS.