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HAProxy vs Apache Traffic Server: catalog facts
HAProxy	Apache Traffic Server
Free HAProxy Community Edition is free and open source. HAProxy Enterprise is a paid product.	Free Apache Traffic Server is open source under Apache-2.0.
Linux, Self-hosted	Self-hosted
Handles extremely high connection rates with predictable latency Detailed health checking, queuing and rate limiting built in	Caches HTTP requests to reduce origin load Can act as a proxy and load balancer
Configuration is its own language with a steep learning curve No native automatic certificate issuance; ACME is handled alongside it	Requires server installation and administration
Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: GPL-2.0	License: Apache-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 September 22, 2026	Official website Full listing and sources Checked October 8, 2026

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