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Katzenpost vs GNUnet: catalog facts
Katzenpost	GNUnet
Free Free and open-source software.	Free Free software from the GNU project with no paid tier.
Self-hosted, Command line	Linux
Protects metadata, not just message content Uses post-quantum cryptography	Designed to protect metadata, not only message content Backed by academic research
A research project aimed at technical users Running a useful network requires several operators and nodes	A protocol stack and framework rather than a polished end-user app Technical to install and understand
Self-hosted	Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is 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 September 23, 2026

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