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BitTorrent client 

This article is about BitTorrent clients in general. For the client created by Bram Cohen, see BitTorrent (software).

A BitTorrent client is a program that manages torrent downloads and uploads using the BitTorrent protocol.

The first client, known as BitTorrent, was created by Bram Cohen in the summer of 2002. Many subsequent clients have been at least partially based on it. Not all clients were originally built for BitTorrent, having added support for the protocol later on. There have been attempts to package malware as BitTorrent clients, probably due to the availability of many legitimate clients and users' willingness to try new ones.

Contents

Comparison

The following tables compare general and technical information for a number of applications supporting the BitTorrent protocol. Please see the individual products' articles for further information. This article is neither all-inclusive nor necessarily up-to-date.

General

BitTorrent client Open Source Linux/Unix Windows Mac OS X IPv6[1] Programming language Based on Interface Spyware/Adware/Malware-free
ABC Yes Partial Yes No buggy[2] Python BitTornado GUI and web Yes
Acquisition Partial No No Yes ? Objective-C and Cocoa Limewire GUI Yes
Anatomic P2P Yes Yes Yes Yes No Python BitTornado GUI and old CLI Yes
Arctic Torrent Yes No Yes No No C++ libtorrent GUI Yes
aria2 Yes Yes Yes Yes ? C++ - CLI Yes
Vuze (formerly Azureus) Yes Yes Yes Yes Partial[3] Java and SWT - GUI, CLI, Telnet, Web, XML over HTTP remote control API Yes
BitComet No No Yes Yes No C++ ? GUI Yes [4]
BitFlu Yes Yes No Yes Yes Perl - Telnet and Web Yes
BitLet Planned Yes Yes Yes ? Java and JavaScript - Web XHTML Yes
BitLord No No Yes No No C++ BitComet GUI Adware[5]
BitPump No No Yes No No C++ - GUI No
BitThief No Yes Yes Yes ? Java ? GUI Yes
BitTornado Yes Yes Yes Yes Yes Python BitTorrent GUI and CLI Yes
BitTorrent 5 / Mainline Yes Yes Yes Obsolete No Python - GUI and CLI Yes
BitTorrent 6 No No Yes No Yes C++ µTorrent GUI and CLI Yes
BitSpirit No No Yes No No C++ BitComet GUI Yes
Bits on Wheels No No No Yes Yes Objective-C and Cocoa - GUI Yes
BitTyrant Yes Yes Yes Yes Partial [3] Java and SWT Azureus GUI, CLI, Telnet, Web, XML over HTTP remote control API Yes
Blizzard Downloader No No Yes Yes ? ? BitTorrent client for early version GUI Yes
Blog Torrent Yes No Yes Yes ? ? BitTorrent client for early version GUI Unknown
BTG Yes Yes Partial[6] Yes No C++ libtorrent CLI, GUI and web Yes
BTPD Yes Yes No No Planned C - CLI Yes
BTSharp (library) No No Yes No No C# No No Yes
burst! Yes No Yes No ? Python ? GUI Yes
CTorrent Yes Yes No No No C++ ? CLI Yes
Deluge Yes Yes Yes Yes[7] Yes Python and C++ libtorrent GUI and Web Yes
FlashGet No No Yes ? No ? ? Yes Yes
FoxTorrent Partial[8] Yes Yes Yes No XUL / JavaScript Red Swoosh GUI (FireFox) Yes
Free Download Manager Yes No Yes No ? C++ libtorrent GUI Yes
freeloader Yes Yes No No ? Python ? GUI Yes
G3 Torrent Yes No Yes No ? Python BitTorrent GUI and web Yes
Gnome BitTorrent Yes Yes No No ? Python ? GUI Yes
Halite Yes No Yes No ? C++ libtorrent GUI Yes
KTorrent Yes Yes No [3] Yes Yes C++ - GUI, Web and CLI (Alpha) Yes
LimeWire Yes Yes Yes Yes No Java - GUI Yes
Localhost Yes Yes Yes No ? Java and SWT Azureus Web Yes
Miro Yes Yes Yes Yes ? C++ libtorrent GUI Yes
MP3 Rocket Yes No Yes No No Java - GUI Yes
MLDonkey Yes Yes Yes Yes No Ocaml - CLI, Telnet, Web, Network GUI Yes
MonoTorrent (library) Yes Yes Yes Yes Yes C# - API Yes
MooPolice No No Yes No Yes C++ libtorrent GUI Yes
Opera 9.0/9.50 No Yes Yes Yes Yes C++ - GUI Yes
QTorrent Yes Yes No No ? C++/PyQt BitTornado GUI Qt (toolkit) Yes
Qbittorrent Yes Yes No Yes Yes C++ libtorrent GUI Qt (toolkit) Yes
rTorrent Yes Yes No Yes buggy[2] C++ [http://libtorrent.rakshasa.no/ Rakshasa's libtorrent CLI and SCGI Yes
Rufus Yes Yes Yes No No Python G3 Torrent GUI and web Yes
Shareaza Yes No Yes No No C++ - GUI and web Yes
sharktorrent Yes Yes Yes Yes ? C++ libtorrent GUI wxwidgets Yes
Snark Yes Yes ? ? ? ? ? ? Yes
SymTorrent Yes No No No ? ? ? ? Yes
Tomato Torrent Yes No No Yes No Cocoa BitTorrent GUI Yes
Torrent Swapper Yes Yes Yes Yes buggy[2] Python BitTorrent GUI and web Yes
TorrentFlux Yes Yes Yes Yes Yes PHP BitTornado Web Yes
TorrentRelay No Yes Yes Yes Yes Perl & Python Bittorent Web Yes
TorrentVolve Yes Yes Yes Yes [9] PHP Azureus Web Yes
Transmission Yes Yes No Yes No C and Cocoa - GUI, CLI, Daemon and Web Yes
Tribler Yes Yes Yes Yes Yes Python ABC GUI and CLI Yes
Turbo Torrent No No Yes No ? Python G3 Torrent GUI and web Malware
tvitty No No Yes No Yes C++/C# libtorrent Media Center GUI Yes
TorrentSpy Rufus Yes No Yes No ? Python Rufus GUI Adware[10]
µTorrent No[11] With Wine[12] Yes[12] With Wine[12] and in development.[13] Yes C++[14] BitTorrent GUI and Web Yes
WizBit Yes No No No ? Python - Mobile phone GUI (alpha) Yes
XTorrent No No No Yes No C and Cocoa Transmission GUI Yes
ZipTorrent No No Yes No ? C++ libtorrent GUI Yes
BitTorrent client FOSS Linux/Unix Windows Mac OS X IPv6[1] Programming language Based on Interface Spyware/Adware/Malware-free

Features I

BitTorrent client Super-seeding Tracker UPnP[15] NAT Port Mapping Protocol NAT traversal DHT[16] Peer exchange Encryption UDP tracker
ABC No Yes Yes ? No No No No ?
Acquisition No No No Yes No No ? No ?
Anatomic P2P Yes Separate download Yes ? ? ? ? No ?
Arctic Torrent No No No ? No No Yes No ?
aria2 ? ? ? ? ? Yes Yes Yes ?
Azureus Yes Yes Yes Yes Yes[17] Yes[18] Yes Yes Yes
BitComet Yes Separate download Yes Yes Yes Yes Yes Yes Yes
BitFlu No No No No No No Yes No ?
BitLet No No Yes No No No No No ?
BitLord No No Yes ? Yes No Yes No Yes
BitPump Yes ? No No No No No ? ?
BitThief ? ? ? ? ? ? ? ? ?
BitTornado Yes Yes[19] Yes ? No No No Yes ?
BitTorrent 5 / Mainline No Yes[19] Yes Yes No Yes Yes Yes ?
BitTorrent 6 Yes Yes Yes Yes No Yes Yes[20] Yes ?
BitSpirit Yes No Yes Yes Yes Yes ? Yes Yes
Bits on Wheels No No No No No No No No ?
BitTyrant Yes Yes Yes Yes Yes[21] Yes[18] Yes Yes ?
Blizzard Downloader No No No ? No No No No ?
Blog Torrent ? Yes ? ? ? ? ? ? ?
BTG ? No Yes Yes ? Yes Yes Yes Yes
BTPD ? ? ? ? ? Yes ? ? ?
BTSharp(library) No Yes Yes No No No No No ?
burst! Yes No ? ? ? ? ? No ?
CTorrent ? ? ? ? ? ? ? No ?
Deluge No No Yes Yes Yes Yes Yes Yes Yes
FlashGet ? ? ? ? ? Yes ? Yes ?
FoxTorrent No No Yes No No No No No ?
Free Download Manager ? Yes ? ? ? Yes ? ? ?
freeloader ? No ? ? ? ? ? No ?
G3 Torrent No No No ? No No ? No ?
Gnome BitTorrent ? No No ? ? No No No ?
Halite No No Yes Yes No Yes No Yes Yes
KTorrent No No Yes Yes No Yes Yes Yes Yes
LimeWire No No Yes No No Yes No No No
Localhost Yes Yes Yes ? Yes Yes [22] ? No ?
MLDonkey No Yes No ? No No ? No ?
MonoTorrent (library) No Yes Yes Yes No No No Yes ?
MooPolice No No Yes Yes No Yes Yes[23] Yes Yes
Opera 9.0 No Yes[24] ? ? ? ? No ? ?
Opera 9.5 No Yes ? ? ? ? Yes[25] ? ?
QTorrent No No No ? No No No No ?
Qbittorrent No No Yes ? No Yes Yes Yes Yes
rTorrent Yes No No No No Yes Yes Yes ?
Rufus No No ? ? No No ? No ?
Shareaza No No Yes ? No Yes[26] ? No ?
sharktorrent No No Yes ? No Yes ? No ?
Snark ? Yes ? ? ? ? ? ? ?
SymTorrent No No ? ? ? No No No ?
Tomato Torrent No Yes ? ? ? Yes ? No ?
Torrent Swapper Yes Yes[19] Yes ? No No Yes No ?
TorrentFlux Yes No Yes ? No No No Yes ?
TorrentRelay No No Yes ? No No Yes Yes ?
TorrentVolve [9] No [9] [9] [9] [9] [9] [9] ?
Transmission No No Yes Yes Yes No Yes[27] Yes ?
Tribler ? ? Yes Yes ? Yes Yes Yes ?
Turbo Torrent Yes Yes Yes ? No No ? No ?
tvitty No No Yes Yes Yes Yes Yes No Yes
TorrentSpy Rufus No No ? ? ? No ? No ?
µTorrent Yes Yes Yes Yes No Yes[28] Yes[29] Yes No
WizBit No No No ? No No No No ?
XTorrent No No Yes Yes No No Yes[30] No ?
ZipTorrent ? ? Yes ? No ? ? No ?
BitTorrent client Super-seeding Tracker UPnP[15] NAT Port Mapping Protocol NAT traversal DHT[16] Peer exchange Encryption UDP tracker

Features II

BitTorrent client Cache[31] Web seeding[32] Broadcatching (RSS) Prioritization Selective downloads SOCKS Remote control via web Engine Auto updates Notes
ABC ? Yes No Yes No ? Yes Separate download ? Linux version = old version
Acquisition ? No No No No No No No ? 3 torrents max, infinity when registered
Anatomic P2P ? Yes ? ? ? ? ? ? ? Tracker exists as a separate download
Arctic Torrent ? No No No No No No No ?
aria2 No No No No Yes ? No No ?
Azureus Yes Yes [33] Plugin Yes Yes Yes Plugin[34] Yes Yes
BitComet Yes No Beta Yes Yes Yes No Built-in Web browser Yes Tracker exists as a separate download
BitFlu Partial No No No Yes No Yes No No No built-in Cache-Disk cache but a Delayed commit
BitLet No No No No No No No No Yes
BitLord Yes No Yes Yes Yes Yes No Built-in Web browser Yes
BitPump ? ? ? ? ? ? ? ? ?
BitThief ? ? ? ? ? ? ? ? ? Designed to abuse the BitTorrent protocol. Never uploads real data, only downloads
BitTornado Yes Yes No Yes Yes No No No No
BitTorrent 5 / Mainline ? Yes No Yes Yes No No Yes Yes
BitTorrent 6 Yes Yes Yes Yes Yes Yes Yes Yes Yes
BitSpirit Yes No No Yes Yes Yes No Yes Yes
Bits on Wheels ? ? ? ? No ? No ? ?
BitTyrant Yes Yes [33] Plugin Yes Yes Yes Plugin[34] 3rd party plugins Yes
Blizzard Downloader ? No No No No ? No No ?
Blog Torrent ? No No No No ? No No ?
BTG Yes Yes No Yes Yes ? Yes No No
BTPD ? ? ? ? ? ? ? ? ?
BTSharp (library) Yes No No No No