@cbowdon If you're still interested in Caddy you should be aware of this:
https://caddyserver.com/blog/accouncing-caddy-commercial-licenses.html
In summary, Caddy is still open-source (Apache 2.0) but the precompiled binaries available from caddyserver.com have a new EULA that requires you to pay if you're a commercial user. Also the non-commercial builds emit a new HTTP response header that advertises Caddy's sponsors.
Interesting discussion about this announcement on HN:
Announcing Caddy Commercial Licenses
Today, we're pleased to unveil something we've been working diligently on for the past few months: Caddy Commercial Licenses. This change is designed to accommodate the needs of the growing Caddy community and user base. With commercial licenses, we're able to offer exclusive features and services to our business users that we couldn't do before, while sustaining Caddy's open source development. We're even starting today with one new service for our customers, with more planned!