RakNet is a networking API that is a wrapper for reliable UDP and higher level functionality on Windows, Linux, and Unix. It allows any application to communicate with other applications on the same computer, over a LAN, or over the internet.

RakNet is a cross-platform, open-source, object-oriented networking library for C++ created by RakkarSoft. It is specialized for game development, and is available under three different licenses. It uses UDP for network communications, and supports Client/Server and P2P systems.