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Calyx VPN vs Psiphon: catalog facts
Calyx VPN	Psiphon
Free Free, funded by Calyx Institute members and donations.	Freemium Free to connect, with an optional subscription or PsiCash for ad-free, faster connections.
Android	Windows, Android, iOS
No account needed No logging, according to the provider	Several blocking-resilient transports that keep working where standard VPNs fail Free to use with no payment needed
Only Calyx Institute servers are available Android only	The free tier shows ads and runs at lower speeds Traffic passes through servers run by Psiphon
Downloadable app, Hosted service	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
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.