The best replacement for i2p is tor.

The best alternatives to i2p are rated as following:
★★★★★  tor
★  cjdns
★  freenet
★  gnunet

Your alternative for i2p is not listed? Suggest!
Speaking about i2p, one probably shouldn't forget about utorrent.

Other search terms related to i2p and their ratings are:
★★★★★ utorrent
★★★ bittorrent
★★★ azureus
★★★ vuze
★ emule
You have in mind a companion for i2p and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of i2p in all years. Click on graph for more.
i2p
tor
cjdns