The following is a general comparison of the best open-source and free of adware BitTorrent clients, which are computer programs designed for peer-to-peer (P2P) file sharing using the BitTorrent protocol.
| BitTorrent client | Initial release | Compatibility | Features | Programming language |
|---|---|---|---|---|
| May 16, 2006 | Mac, Windows, Linux, PortableApps.com | Ad-free, Magnet URI, Preload Magnet metadata, Super seeding, HTTP Web seeding, Built-in RSS reader, Command line interface, Integrated Search, Lightweight, Multiple languages, Torrent search, Speed charts | C++ (Qt), Python | |
| September 15, 2005 | Mac, Windows, Linux, PortableApps.com | Ad-free, Magnet URI, Preload Magnet metadata, HTTP Web seeding, Command Line support, Lightweight | C, Objective-C | |
 Deluge | September 25, 2006 | Mac, Windows, Linux | Ad-free, Magnet URI, HTTP Web seeding, Extensible by Plugins/Extensions | Python, C++ |
