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3proxy vs Realm: catalog facts
3proxy	Realm
Free Free and open source.	Free Free and open source under the MIT licence.
Windows, Linux, Self-hosted, Command line	Windows, Linux, Self-hosted, Command line
HTTP, SOCKS and port mapping in one small server Runs on routers through an OpenWrt package	Starts a relay with a single command Concurrent bidirectional forwarding
Configured through text files with no graphical interface Takes some networking knowledge to set up securely	Command-line only, with no graphical interface Documentation is mostly in the repository readme
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License not stated	License: MIT
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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