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Apache Traffic Server vs HAProxy: catalog facts
Apache Traffic Server	HAProxy
Free Apache Traffic Server is open source under Apache-2.0.	Free HAProxy Community Edition is free and open source. HAProxy Enterprise is a paid product.
Self-hosted	Linux, Self-hosted
Caches HTTP requests to reduce origin load Can act as a proxy and load balancer	Handles extremely high connection rates with predictable latency Detailed health checking, queuing and rate limiting built in
Requires server installation and administration	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
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 22, 2026

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