Caddy vs Nginx as a reverse proxy (2026)
Both are excellent reverse proxies. Caddy wins on automatic HTTPS and config simplicity; Nginx wins on battle-tested tuning and ecosystem breadth. An honest comparison.
If you are putting a reverse proxy in front of a self-hosted service, you will land on one of two names: Caddy or Nginx. Both are mature, both are fast, both will serve you well. They differ in philosophy more than performance — and choosing well saves an afternoon of configuration.
The core difference
Caddy is built around automatic HTTPS: it obtains and renews certificates on its own the moment you name a domain in the config. Nginx expects a certificate already on disk and wants you to point it at the files. That single design decision cascades into most of the practical differences below.
Comparison
| Caddy | Nginx | |
|---|---|---|
| HTTPS certificates | Automatic (ACME, renews itself) | Manual — certbot or commercial |
| Config style | Small, readable Caddyfile | More verbose, directive-based |
| Learning curve | Gentle | Moderate to steep |
| Performance at high load | Excellent | Excellent, slightly more tunable |
| Static file serving | Very good | Excellent, the traditional choice |
| Ecosystem / tooling | Growing steadily | Vast — most third-party docs assume Nginx |
| Best for | Fast, correct HTTPS with minimal config | Tuning, high concurrency, existing Nginx expertise |
When Caddy is the obvious choice
Most self-hosted services need a working HTTPS endpoint this weekend, not a tuned one eventually. Caddy gets you a valid, auto-renewing certificate in about three lines of config, which means fewer moving parts between you and a working reverse proxy. If your goal is a self-hosted stack that just works, start with Caddy.
When Nginx is the better fit
Nginx is the better fit when you are serving a lot of static files at once, when you need fine-grained tuning of workers and buffers, or when you are following a tutorial written for Nginx. Its ecosystem is decades deep, and when something breaks, the fix is almost certainly documented somewhere for Nginx first.
Note · Whichever you pick, the non-negotiable steps are the same: terminate TLS properly, proxy the real client IP through, and never expose the backend port directly to the internet.
Migrating or running both
You do not have to choose forever. Both read a plain config file, so you can stand up Caddy in front of an existing Nginx, or move an Nginx config to Caddy line by line. Our Caddy guide covers the common self-hosting patterns.
Recommendation
- ▹Self-hosted service, want HTTPS without thinking → Caddy.
- ▹High-traffic static site, or you already run Nginx → stay with Nginx.
- ▹You want to learn proxy fundamentals → either; Caddy is the gentler teacher.
FAQ
QIs Caddy or Nginx faster?
AAt typical self-hosting loads, the difference is irrelevant — both are extremely fast. Nginx has more tuning knobs at very high concurrency.
QDoes Caddy really handle HTTPS automatically?
AYes. It requests, installs and renews certificates itself via ACME as soon as you name a domain.
QCan I use Caddy in front of Nginx?
AYes. Many people terminate TLS in Caddy and proxy to an Nginx backend for the services that prefer it.