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Psiphon vs GreenTunnel: catalog facts
Psiphon	GreenTunnel
Freemium Free to connect, with an optional subscription or PsiCash for ad-free, faster connections.	Free Free and open source under the MIT licence.
Windows, Android, iOS	Windows, macOS, Linux, Command line
Several blocking-resilient transports that keep working where standard VPNs fail Free to use with no payment needed	Works around DPI-based website blocking Desktop app and command-line tool
The free tier shows ads and runs at lower speeds Traffic passes through servers run by Psiphon	Does not hide your IP address like a VPN or Tor Effectiveness depends on how a given ISP filters traffic
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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