# Psiphon-Labs/psiphon-tunnel-core

Psiphon is an Internet censorship circumvention system.

Repository: https://github.com/Psiphon-Labs/psiphon-tunnel-core
Canonical: https://ross.abutalabs.com/products/psiphon-tunnel-core
Language: Go
License: GPL-3.0
License Family: copyleft
Topics: psiphon, censorship-circumvention, golang
Last push: 2026-09-02T20:19:03+00:00

## Health v2 (maintenance only)
Score: 96/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 88, longevity 100
- inputs: {"age_days": 4373, "days_push": 0, "days_rel": 1, "gap_med": 43, "n_releases_24m": 10}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1145, forks 353 (observed 2026-09-03T02:15:07.117682+00:00)

## What it is
Psiphon Tunnel Core is the core tunneling client and server implementation of the Psiphon Internet censorship circumvention system, written in Go. It routes user traffic through proxy servers beyond censoring networks using SSH-secured tunnels with obfuscation and server discovery mechanisms.

## Use cases
- circumvent internet censorship and blocking
- tunnel traffic through a proxy beyond a censoring network
- embed a censorship circumvention client in Android or iOS apps
- run a local SOCKS or HTTPS proxy to evade blocking
- deploy a circumvention proxy server
- build a CLI tunnel client for desktop platforms

## When to choose
- you need a battle-tested, actively maintained censorship circumvention tunnel
- you want to embed circumvention into mobile apps via client libraries
- you need SSH-based encrypted tunneling with obfuscation and server discovery

## When to avoid
- you only need a general-purpose VPN without anti-censorship features
- you need a simple personal proxy without Psiphon's server infrastructure
- GPL-3.0 licensing is incompatible with your project

## Facets
- artifact type: library
- maturity: active
- function: proxy, vpn, networking, security, http-client, cli
- domain: censorship-circumvention, privacy, networking, security
- platform: windows, go, cross-platform
- tags: censorship-circumvention, tunneling, ssh, anti-censorship, golang, linux, macos, android, ios

## Member repositories
- Psiphon-Labs/psiphon-tunnel-core (main) score 96

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:07.117682+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:34:26.091827+00:00, confidence not recorded.
  - readme: https://github.com/Psiphon-Labs/psiphon-tunnel-core (fetched 2026-09-03T02:15:07.117682+00:00, sha f993ed9b796e)
- Data as of 2026-08-30T08:39:29.467469+00:00.