Tangled is built on top of the AT Protocol, and "mediates" between what they call "knots". Git servers. Their strength is to use AT Protocol to make communication across multiple Git servers work smoothly.
Radicle is completely peer to peer. There are no such things as servers and clients, only nodes. However, there are quite a few nodes that then act as HTTP servers to offer convenient access via the browser.
Radicle is completely peer to peer. There are no such things as servers and clients, only nodes. However, there are quite a few nodes that then act as HTTP servers to offer convenient access via the browser.