Tor vs Psiphon

Psiphon operates a global network of servers managed by Psiphon Inc., a Canadian company. The client application automatically connects to Psiphon servers using a rotating combination of protocols: SSH tunneling, VPN (L2TP/IPSec), HTTP/HTTPS proxy, and obfuscated protocols. Psiphon's infrastructure is cloud-hosted across multiple providers to resist blocking. When one IP range is blocked, Psiphon automatically rotates to another. This centralized architecture has advantages: rapid response to blocking (Psiphon Inc. can provision new IPs quickly), ease of use (no configuration required), and reliability through infrastructure diversity. Disadvantages: Psiphon Inc. is the single trust point - they can see what their users access. As a Canadian company, they are subject to Canadian and allied intelligence-sharing laws. For users who trust Psiphon Inc. and need circumvention without anonymity: Psiphon is a practical choice. For users who need anonymity from the circumvention infrastructure operator itself: Tor is the only appropriate choice.

Psiphon: your traffic exits through Psiphon servers. Psiphon Inc. can see your browsing destinations (they do not log individual sessions per their policy, but technically can). Your real IP is known to the first Psiphon server you connect to. Traffic content is encrypted between your device and Psiphon servers but decrypted at the Psiphon exit point for clearnet destinations. Tor: no single entity sees both your real IP and your destinations. Tor Project does not operate network infrastructure (relays are run by volunteers). Traffic is encrypted in multiple layers. For activities requiring anonymity from infrastructure operators: Tor provides what Psiphon cannot. For activities requiring only bypass of local censorship with no other privacy requirement: Psiphon is simpler and often faster.

Psiphon's centralized infrastructure allows rapid IP rotation and capacity scaling. Speed: Psiphon often achieves 5-50 Mbps, significantly faster than Tor's 1-5 Mbps. Reliability during blocking events: Psiphon's infrastructure team responds quickly to block-and-rotate cycles. Tor relies on the distributed bridge and relay network to respond to blocking - slower to adapt but more resilient long-term. In Iran during the 2022 protests: both Psiphon and Tor experienced disruptions, but Psiphon's faster IP rotation often provided more consistent access during the acute blocking period. Tor's bridges (especially Snowflake) provided access after Psiphon was temporarily disrupted. The tools are complementary: Psiphon for speed and ease, Tor for anonymity and resilience.

Use Psiphon when: you need fast, reliable censorship bypass for general browsing and social media, ease of use is a priority (no configuration), and the Psiphon Inc. trust model is acceptable. Use Tor when: anonymity from the circumvention operator is required, accessing .onion services, conducting sensitive activities (journalism, whistleblowing, political organizing) where being identified by a VPN-like operator is a risk. Combined use: use Psiphon for everyday browsing in censored environments, use Tor when working on sensitive matters. Some users run Tor over Psiphon: Psiphon provides the bypass layer, Tor adds anonymity on top. This combines Psiphon's reliable bypass with Tor's anonymity, at some performance cost.

Psiphon is funded in part by US State Department agencies (BBG/USAGM) for supporting circumvention in countries with authoritarian governments. This funding provides Psiphon with resources to maintain infrastructure but also means Psiphon aligns with US foreign policy goals. Some users in censored countries are uncomfortable with US government-funded circumvention tools. The Tor Project receives diverse funding and maintains independence from any single government. Both Tor and Psiphon are open source - code can be audited. Organizational independence matters for trust: Tor's non-profit structure, diverse funding, and academic research grounding provide a different trust profile than Psiphon's public-benefit corporate structure with direct government contracts.