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Caddy vs HAProxy: catalog facts
Caddy	HAProxy
Free Free and open source under Apache 2.0.	Free HAProxy Community Edition is free and open source. HAProxy Enterprise is a paid product.
Windows, macOS, Linux, Self-hosted	Linux, Self-hosted
Automatic HTTPS by default, including a managed local CA for internal names and IPs A working reverse proxy with TLS takes two lines of configuration	Handles extremely high connection rates with predictable latency Detailed health checking, queuing and rate limiting built in
Fewer third-party modules and less documentation than nginx Adding modules means rebuilding the binary with xcaddy	Configuration is its own language with a steep learning curve No native automatic certificate issuance; ACME is handled alongside it
Downloadable app, Self-hosted	Self-hosted
Open source	Open source
License: Apache-2.0	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.