Built on the Holepunch/Pear protocol suite https://docs.pears.com/

Holepunch is the company and Keet is an example app. 

All of the components are open source https://github.com/holepunchto/

They’ve got some kind of long term crypto funding that’s been supporting all this. Originally Dat Protocol

For others, utopia is an island flowing with milk and honey with communal property, religious tolerance, and equality for all.

For me, utopia is an Internet with no NAT devices so peer-to-peer protocols could function the way God intended.

NAT isn't the only thing that makes p2p protos have a hard time, but it certainly is up there in the list of "it's probably X" in diagnostics

BDFL of Quilibrium, Eng @ Farcaster, ex-Coinbase, always opinionated, never hydrated

/quilibrium

What else is on your list of things that make p2p protos have a hard time? I suspect scaling private groups is one?