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Realm vs tproxy: catalog facts
Realm	tproxy
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Windows, Linux, Self-hosted, Command line	Windows, Linux, Command line
Starts a relay with a single command Concurrent bidirectional forwarding	Simple way to inspect TCP traffic between two services Shows connection statistics alongside traffic
Command-line only, with no graphical interface Documentation is mostly in the repository readme	Some TCP statistics only work on Linux Command line only, with no graphical interface
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Not stated if it works offline	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.