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tproxy vs Realm: catalog facts
tproxy	Realm
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Windows, Linux, Command line	Windows, Linux, Self-hosted, Command line
Simple way to inspect TCP traffic between two services Shows connection statistics alongside traffic	Starts a relay with a single command Concurrent bidirectional forwarding
Some TCP statistics only work on Linux Command line only, with no graphical interface	Command-line only, with no graphical interface Documentation is mostly in the repository readme
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
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.