µTorrent or utorrent is a client program for BitTorrent protocol for sharing files which are normally called as torrents. It supports major platforms and has a Freemium model with ads in the free version. Developed by BitTorrent Inc
License: Freemium
Shareaza is a peer-to-peer file sharing client running under Microsoft Windows which supports the gnutella, Gnutella2 (G2), eDonkey, BitTorrent, FTP, HTTP and HTTPS network protocols and handles magnet links, ed2k links, and the now deprecated gnutella and Piolet links. Developed by Shareaza Development Team
License: Open Source
Shareaza offers multi-protocol support, making it versatile for various file-sharing needs, but struggles with speed and stability. In contrast, µTorrent is a lightweight and efficient torrent client with a strong focus on performance, though it lacks multi-protocol support.