The best free alternative to I2P is Tor, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to I2P and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to I2P are Matrix, Hyphanet, Snowflake Tor and IPFS.
Tor is free software and an open network that helps you defend against traffic analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security.
United States
Open standard protocol enabling decentralized, encrypted instant messaging, VoIP signaling, IoT device connectivity, and persistent data management across federated servers without central control or single points of failure, bridging communication platforms.
United Kingdom
Hyphanet (former Freenet) is free software which lets you anonymously share files, browse and publish "freesites".
Snowflake is a system to defeat internet censorship. People who are censored can use Snowflake to access the internet. Their connection goes through Snowflake proxies, which are run by volunteers.
United States
IPFS is a global, versioned, peer-to-peer filesystem. It combines ideas from Git, BitTorrent, Kademlia, SFS, and the web. It is like a single bittorrent swarm, exchanging git objects. IPFS provides an interface as simple as the HTTP web, but with permanence built in.
United States
SOCKS5 proxy offering high-speed asynchronous networking, flexible encryption, and easy deployment. Optimized for cross-platform use on PC, Mac, mobile, and routers. Open-source design supports secure, uncensored, and private Internet access worldwide.
China
ZeroNet uses cryptography (Bitcoin library) and BitTorrent DHT (centralized trackers) to build a distributed censorship-resistant network.
Lokinet is a decentralised onion router that uses Oxen service nodes as relays, giving Lokinet the same market-based Sybil attack resistance as the Oxen blockchain. Lokinet supports web browsing, onion-routed real-time voice communications, and other applications.
Australia
I2P (Invisible Internet Protocol) is a universal anonymous network layer. All communications over I2P are anonymous and end-to-end encrypted, participants don't reveal their real IP addresses.
Switzerland
GNUnet is a framework for secure peer-to-peer networking that does not use any centralized or otherwise trusted services. A first service implemented on top of the networking layer allows anonymous censorship-resistant file-sharing.
Germany
EU
A proof-of-concept scalable IPv6 meshnet, featuring end-to-end encryption, a unique spanning tree routing algorithm and aiming to implement novel backpressure routing metrics.
The I2Pd Browser Bundle is a folder consisting of Purple I2P/I2Pd & Portable Firefox.
Russia