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Ultrasurf vs Psiphon: catalog facts
Ultrasurf	Psiphon
Free Free to download and use.	Freemium Free to connect, with an optional subscription or PsiCash for ad-free, faster connections.
Windows	Windows, Android, iOS
Traffic is disguised as ordinary TLS web traffic Small, portable download that needs little setup	Several blocking-resilient transports that keep working where standard VPNs fail Free to use with no payment needed
Closed source, so its security claims cannot be independently audited Focused on getting past censorship rather than full VPN features	The free tier shows ads and runs at lower speeds Traffic passes through servers run by Psiphon
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is 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.