Notes 
The Invisible Internet Project (I2P) is an anonymous network layer that allows for censorship-resistant, peer-to-peer communication. Anonymous connections are achieved by end-to-end encrypting the user’s traffic, and sending it through a volunteer-run network of roughly 55,000 computers distributed around the world.
Reviewed by Gabriel Bachmann
I2P
geti2p.net 4.9 (8)
Anonymizing Networks Open Source E2E encrypted Decentralized For experts Windows macOS Linux Android Free
Rate I2P: No account needed
Threat level
Targeted
A targeted-tier tool. Built for a real, capable adversary. Overkill for everyone below. Threat levels
Our take
Built for a different job than Tor: a closed peer-to-peer network optimized for hidden services and torrenting inside it rather than anonymous access to the regular web. That focus is the catch, since reaching the normal internet through it is an afterthought and the learning curve is steep. Pick it if you want to host or use eepsites and tolerate the setup friction. Anyone who just wants anonymous browsing of ordinary sites is better served by Tor.
GitHub at a glance
i2p/i2p.i2p anonymitycryptoi2pjavamonotonenetworkp2prouter
Stars
2,752
+12 this week
Forks
365
122 watching
Last commit
2d ago
healthy
Latest release
i2p-2.14.0
13d ago, 100+ total
Star history
Issues
89% closed
12
open
99
closed
+2 / -3
opened / closed, last 4 weeks
Opened vs closed, last 12 weeks
Commits, last 26 weeks
336 commits, active 26 of 26 weeks
28 contributors since May 2012
Languages
- Java 86.2%
- HTML 5.2%
- CSS 4.6%
- Other 4%
Updated daily from the GitHub API. Star tracking since Jun 10, 2026.
Website at a glance
geti2p.net
C score 55
Basic website security headers
Graded by Mozilla HTTP Observatory, tested 8d ago
Inspect this site yourself
Measures the security configuration of the tool's own website, not the privacy of the product itself. A strong tool can still score low here.
I2P alternatives
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Orbot Free, open-source Tor VPN app for Android and iOS that routes device traffic through the Tor network. Supports per-app Tor routing and access to .onion services on Android.
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Retroshare Peer-to-peer communication and file sharing app based on a friend-to-friend network built on GNU Privacy Guard (GPG). Optionally, peers may communicate certificates and IP…