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HAProxy vs stunnel: catalog facts
HAProxy	stunnel
Free HAProxy Community Edition is free and open source. HAProxy Enterprise is a paid product.	Free Free under the GPL 2.0 or later, with paid commercial support and non-GPL licences…
Linux, Self-hosted	Windows, Linux, Command line
Handles extremely high connection rates with predictable latency Detailed health checking, queuing and rate limiting built in	Adds TLS to existing programs without code changes Supports load balancing for larger deployments
Configuration is its own language with a steep learning curve No native automatic certificate issuance; ACME is handled alongside it	Configured through text files, with no graphical setup Not a community project; development is controlled by the author
Self-hosted	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-2.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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