Caddy supports the HTTP-01 and TLS-ALPN-01 challenges by default, you just need to expose 80/443 and it just works. But if you want to use the DNS-01 challenge you’d need to build it with a plugin of your DNS provider.

Traefik supports all 3 challenges equally ootb, with a wide range of DNS providers. But it is a bit harder to configure and doesn’t support being a web server.