You should look up i2psnark in particular, that was the first big one I'm aware of, but there are plenty of others too. Tor has a large critical mass - which m

You should look up i2psnark in particular, that was the first big one I'm aware of, but there are plenty of others too. Tor has a large critical mass - which makes it safer in general, through pure volume - but I2P is more suited to this for a bunch of technical reasons I'm not going to go into in detail right now, but they involve garlic routing vs onion routing, end-to-end correlation, single-ended vs double-ended tunnels/circuits... basically, Tor hidden services are okay, but I2P is actually designed for more generalised use like this. I may or may not be biased. :)