Nginx vs Caddy for Django

Problem statement

Every production Django deployment needs a reverse proxy in front of Gunicorn or Uvicorn to terminate TLS, serve static files, buffer slow clients, and enforce limits. Nginx has been the default choice for years. Caddy has become popular because it obtains and renews HTTPS certificates automatically and needs far less configuration. Both are production-grade; the right choice depends on your team's familiarity, your TLS needs, and how much tuning you expect to do.

1. Choose Caddy for small teams and new deployments: automatic HTTPS, a few-line config, sane defaults, and on-demand TLS for customer domains.
2. Choose Nginx when the team knows it, you need fine-grained tuning, rich ecosystem modules, or you follow guides and tools that assume it.
3. Performance is comparable for Django workloads; the app server and database are the bottleneck.
4. Both serve static files efficiently, support HTTP/2 and HTTP/3, and proxy WebSockets.
5. Do not switch proxies to fix a slow app; profile the app instead.

Comparison

HTTPS and certificates

Caddy obtains certificates from Let's Encrypt or ZeroSSL on first start for every site name in its config, renews them automatically, redirects HTTP to HTTPS, and staples OCSP, with no extra tools. Nginx needs Certbot (or another ACME client), a renewal timer, and a reload hook. Both work reliably once set up; Caddy simply removes the steps where people make mistakes.

Configuration

The same Django site in each:

# Caddyfile
example.com {
    encode zstd gzip
    handle_path /static/* {
        root * /srv/app/staticfiles
        file_server
    }
    reverse_proxy unix//run/gunicorn/gunicorn.sock
}

server {
    listen 80;
    server_name example.com;
    return 301 https://$host$request_uri;
}
server {
    listen 443 ssl;
    http2 on;
    server_name example.com;
    ssl_certificate     /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    gzip on;
    location /static/ { alias /srv/app/staticfiles/; }
    location / {
        proxy_pass http://unix:/run/gunicorn/gunicorn.sock;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

Caddy sets forwarding headers by default; Nginx requires them explicitly, which is a frequent source of Django DisallowedHost, CSRF, and redirect issues.

Performance and resources

Nginx is written in C and is extremely efficient; Caddy is written in Go and is also fast. For a Django site, the proxy's overhead is tiny compared with application time, and both handle thousands of concurrent connections on modest hardware. At very high traffic with heavy static or cache workloads, Nginx's tuning options and lower memory use can matter.

Ecosystem and features

Nginx has decades of documentation, Stack Overflow answers, and modules (Brotli, headers-more, GeoIP), plus proxy_cache for microcaching and mature rate limiting. Caddy has a plugin system (DNS providers for wildcard certificates, rate limiting, caching plugins) and a JSON API for live configuration. For multi-tenant SaaS with customer domains, Caddy's on-demand TLS is a standout feature.

Explanation

Both Nginx and Caddy are event-driven reverse proxies that terminate TLS, serve files, and forward requests to an upstream such as Gunicorn. Nginx's configuration language gives precise control and assumes the operator sets every relevant header and limit. Caddy embeds an ACME client and opinionated defaults, trading some control for configurations that are short and hard to get wrong. Django is indifferent to which proxy is in front, as long as it receives the original host and scheme.

Edge cases / notes

• Containers: Caddy in Docker needs a persistent /data volume or it reissues certificates on every recreate; Nginx plus Certbot needs a shared volume for certificates.
• Traefik is a third option for Docker-label-driven routing.
• Cloudflare in front: with Cloudflare terminating TLS, automatic HTTPS matters less; both proxies work with origin certificates.
• Mixing: you can run Caddy for some services and Nginx for others; keep each server consistent.

Next steps

• Configure Nginx thoroughly with Configure Nginx for Django in Production.
• Try the simpler path with Deploy Django With Caddy and Automatic HTTPS.

FAQ

Is Caddy good enough for production Django?

Yes. It is a mature, production-grade server used widely, with automatic HTTPS built in.

Is Nginx faster than Caddy?

Nginx is slightly more efficient, but for Django the difference is negligible compared with app time.

Does Caddy replace Certbot?

Yes. Caddy obtains and renews certificates itself.

Which is easier for beginners?

Caddy, because HTTPS and forwarding headers work with a few lines of configuration.