Comparison of BitTorrent clients

The following is a general comparison of BitTorrent clients, which are computer programs designed for peer-to-peer file sharing using the BitTorrent protocol.[1]

"BitTorrent client" redirects here. For the software application by Bram Cohen, see BitTorrent (software).

The BitTorrent protocol coordinates segmented file transfer among peers connected in a swarm. A BitTorrent client enables a user to exchange data as a peer in one or more swarms. Because BitTorrent is a peer-to-peer communications protocol that does not need a server, the BitTorrent definition of client differs from the conventional meaning expressed in the client–server model.[1]

Bram Cohen, author of the BitTorrent protocol, made the first BitTorrent client, which he also called BitTorrent, and published it in July 2001.[2]

Many BitTorrent programs are open-source software; others are freeware, adware or shareware. Some download managers, such as FlashGet and GetRight, are BitTorrent-ready. Opera 12, a web browser, can also transfer files via BitTorrent.

In 2013 Thunder Networking Technologies publicly revealed that some of their employees surreptitiously distributed a Trojan horse with certain releases of Xunlei, the company's BitTorrent-ready download manager.[3][4] Xunlei is included in the comparison tables.

General
Name Developer Software license Latest stable software release Operating system Year (not dynamic, but easier for sorting)
BitComet BitComet Development Group Proprietary, Adware 1.87 (March 28, 2022 (2022-03-28)) [±][5] Windows, macOS 2020
BitLord House of Life Proprietary, Adware

installs WhenU adware

 Windows:

2.4.6.356 (January 13, 2022 (2022-01-13)) [±]

macOS:
2.4.6-348 (October 24, 2019 (2019-10-24)) [±]

 Windows, macOS 2017
BitTorrent BitTorrent Proprietary, Adware
Windows7.10.5.46097 / September 8, 2021 (2021-09-08)[6]
Mac7.4.3.43797 / September 4, 2019 (2019-09-04)[7]
Android6.5.7 / September 9, 2020 (2020-09-09)[8]
 Windows, macOS 2020
Deluge various GPL-3.0-or-later[Note 1] 2.0.5 (December 15, 2021 (2021-12-15)) [±] Windows, macOS, Linux, BSD 2019
FlashGet Trend Media Proprietary 3.7.0.1220 (May 17, 2013 (2013-05-17)[9]) [±] Windows 2013
Free Download Manager alervd Proprietary 6.13.4.3616 (February 9, 2021 (2021-02-09)) [±][10] Windows, macOS, Android 2020
FrostWire The FrostWire Project GPL-3.0-or-later 6.9.7 (build 311) (January 9, 2022 (2022-01-09)) [±] Windows, macOS, Linux, Android 2019
KGet KDE GPL-2.0-or-later 4.14.38 (November 7, 2017 (2017-11-07)) [±][11] Linux 2019
KTorrent Joris Guisson, Ivan Vasić GPL-2.0-or-later 5.2.0 (June 6, 2020 (2020-06-06)[12]) [±] Linux 2020
Lftp Alexander V. Lukya GPL-3.0-or-later 4.9.2 (August 13, 2020 (2020-08-13)[13]) [±] Linux 2018
LimeWire Lime Wire LLC GPL-2.0-or-later 5.5.16 (September 30, 2010 (2010-09-30)) [±] Windows, macOS, Linux 2010
Miro Participatory Culture Foundation GPL-2.0-or-later 6.0 (April 16, 2013 (2013-04-16)) [±][14] Windows, macOS, Linux 2013
MLDonkey MLDonkey Project GPL-2.0-or-later 3.1.7 (July 6, 2020 (2020-07-06)[15]) [±] Windows, macOS, Linux, MorphOs 2020
μTorrent BitTorrent Proprietary, Adware [a] 3.5.5 (build 46200) (2 February 2022 (2022-02-02)) [±][16] Windows, macOS, Android 2018
Opera 12 Opera Software Proprietary Windows (Presto) – 12.17
Linux, FreeBSD, macOS – 12.16		 Windows, macOS, Linux 2016
qBittorrent Christophe Dumez GPL-2.0-or-later[Note 1] 4.4.2 (March 24, 2022 (2022-03-24)) [±][17]

[18]

 Windows, macOS, Linux, BSD 2021
rTorrent Jari Sundell GPL-2.0-or-later[Note 1] rTorrent 0.9.8 / libTorrent 0.13.8 (July 19, 2019 (2019-07-19)) [±][19] Linux 2019
Robert Sponge, co-developer of I2P GPL 2009
Shareaza Shareaza Development Team GPL 2.7.10.2 (September 18, 2017 (2017-09-18)[20]) [±] Windows 2017
Tixati Kevin Hearn Proprietary 2.89 (March 18, 2022 (2022-03-18)[21]) [±] Windows, Linux 2022
Tonido CodeLathe Proprietary 14.90.0.34030 (January 13, 2017 (2017-01-13)) [±] Windows, macOS, Linux, BSD 2012
Transmission various GPL-2.0-only or GPL-3.0-only[Note 2][Note 1]/MIT[22] 3.00 (May 22, 2020 (2020-05-22)) [±][23] Windows, macOS, Linux, BSD 2020
Tribler The Tribler Team GPL-3.0-only 7.11.0 (January 1, 2022 (2022-01-01)) [±][24] Windows, macOS, Linux, Android 2022
Vuze (formerly Azureus) Vuze Proprietary (platform), GPL-2.0-or-later (core engine), Adware 5.7.6.0 (November 2, 2017 (2017-11-02)) [±][25] Windows, macOS, Linux, Android 2017
Xunlei Thunder Networking Technologies Proprietary, Adware Microsoft Windows:
11,3,3,1842 (9 November 2021 (2021-11-09)) [±][26]

macOS:
4.1.2.65083 (27 November 2021 (2021-11-27)) [±][27]

iOS:
1.3.9 (9 December 2021 (2021-12-09)) [±][28]

Android:
7.35.0.7776 (9 December 2021 (2021-12-09)) [±][26]

 Windows, macOS, Android, iOS 2017
Name Developer Software license Latest stable software release Year
  • a : The option to disable ads is included in the settings.[29]

Operating system support
BitTorrent client Windows macOS Linux BSD iOS Android Other
BitComet Yes Yes No No No No No
BitLord Yes Yes No No No No No
BitTorrent Yes Yes No No No Yes[30] No
Deluge Yes Yes Yes Yes No No Solaris
FlashGet Yes No No No No No No
Free Download Manager Yes Yes Yes No No Yes No
Frostwire Yes[31] Yes[31] Yes[31] Yes[31] No[31] Yes[31] Unix-like,[31] z/OS,[32] Solaris, OS/2, eComStation, ArcaOS[33]
KGet No No Yes Yes No No No
KTorrent No Yes Yes Yes No No No
Lftp Yes Yes Yes Yes No No No
LimeWire Yes Yes Yes Yes No No Yes
Miro Yes Yes Yes Yes No No No
MLDonkey Yes Yes Yes Yes No No Solaris, MorphOS
μTorrent Yes Yes Web No No Yes[34] No
Opera 12 Yes[Note 3] Yes Yes[Note 3] Yes[Note 3] No Yes Solaris
qBittorrent Yes[35] Yes[35] Yes[35] Yes[35] No[35] No[36] OS/2 (including eComStation and ArcaOS), FreeBSD, Haiku[35]
Robert Yes Yes Yes Yes No No No
rTorrent Yes, through Cygwin[37] Yes Yes Yes No No Solaris
Shareaza Yes No No No No No No
Tixati Yes No Yes No No No No
Tonido Yes Yes Yes Yes No No No
Transmission Yes [Note 3] Yes Yes Yes Yes, through Cydia Yes Solaris, OpenWrt
Tribler Yes Yes Yes Yes No No No
Vuze Yes Yes Yes Yes No Yes[38] No
Xunlei Yes Yes No No Yes Yes No
Name Windows Mac OS X Linux BSD iOS Android Other

Interface and programming
BitTorrent client GUI Remote CLI Other Programming language Based on IPv6 μTP
BitComet Yes Yes Partial[39] No C++ - Yes No
BitLord Yes No No No Python, C++ libtorrent (Rasterbar) Yes No
BitTorrent 5, Mainline Yes No Partial No Python - No No
BitTorrent 6 Yes Yes Partial No C++ μTorrent Yes Yes
Deluge Yes Yes Yes Daemon Python, C++ libtorrent (Rasterbar) Yes Yes[40]
FlashGet Yes No No No ? ? No No
Free Download Manager Yes Yes Partial No C++ libtorrent (Rasterbar) No No
Frostwire Yes No No No Java libtorrent (Rasterbar) No Yes[41]
KGet Yes Yes Partial[Note 4] No C++ - Yes No
KTorrent Yes Yes Partial No C++ - Yes Yes[42]
LimeWire Yes No No No Java libtorrent (Rasterbar) No No
Miro Yes No No No C++ libtorrent (Rasterbar) No No
MLDonkey No Third Party[43] Partial Telnet OCaml - No No
μTorrent Yes Yes No[44] RESTful Web API[45] C++[46] - Yes[47] Yes[48]
Opera 12 Yes No No No C++ - Yes No
qBittorrent Yes Yes Partial No Python, C++ libtorrent (Rasterbar) Yes Yes[49]
rTorrent No Third Party Yes SCGI C++ [libTorrent] (Rakshasa) Yes[50] No
Shareaza Yes Yes Partial No C++ - No No
Tixati Yes Yes No Web interface C++ - Yes Yes[51]
Tonido No Yes No No C++ libtorrent (Rasterbar) No No
Transmission Yes Yes Yes Daemon, JSON-RPC over HTTP remote control API C, Objective-C libtransmission Yes Yes[52]
Tribler Yes Partial Partial No Python, C++ libtorrent (Rasterbar) No Yes
Vuze (formerly Azureus) Yes Yes Partial Telnet, XML over HTTP remote control API Java, SWT - Yes Yes[53]
Xunlei Yes No No remote control over internet[54] C++ - No No
BitTorrent client GUI Web CLI Other Programming language Based on IPv6 μTP

Features

The table below details the level of support for the requirements set by BitTorrent Enhancement Proposals

Accepted BEPs

These BEPs describe mechanisms that have been deployed in one or more BitTorrent implementations and have proven useful. They may require minor revisions. They await the blessing of the BDFL before they can be considered Final.

BitTorrent client DHT Protocol
(BEP 5)		 Fast Extension
(BEP 6)		 Extension for Peers to Send Metadata Files
(BEP 9)		 Extension Protocol
(BEP 10)		 Peer Exchange (PEX)
(BEP 11)		 Multitracker Metadata Extension
(BEP 12)		 Local Service Discovery (LPD)
(BEP 14)		 UDP Tracker Protocol
(BEP 15)		 HTTP/FTP Seeding (GetRight-style)
(BEP 19)
BitComet|YesNoYesNoYes[55]
BitLordYesNoYesYesPartial [Note 5][Note 6]
BitTorrent 5, MainlineYesNoYesYesPartial [Note 5][Note 6]
BitTorrent 6YesYesYes[Note 7]Yes
DelugeYesPartial[Note 8]YesYesPartial [Note 5]
FlashGetYesNoNoNo
Free Download ManagerYesNoYesNoNo
KTorrentYesYesYesPartial
LimeWireYesNoYesNoNo
MLDonkeyYesNoNoNo
μTorrentYes[Note 9]Yes[56]Yes[Note 7]Yes[57]Partial [Note 6]
Opera 12NoNoYes[58]No
qBittorrentYesYesYesYesPartial [Note 5]
rTorrentYesNoYesNo[59]No
ShareazaYesNoYesNoNo
TixatiYesYesYesYesPartial [Note 5][Note 10][Note 6]
TonidoYesNoNoNo
TransmissionYesPatch available[60][61][62]Yes[Note 11]YesPartial [Note 6][Note 12]
TriblerYesNoYesNoYes
Vuze (formerly Azureus)Yes[Note 13]YesYesPlug-inYes[63]
XunleiYesNoYesYes
BitTorrent client DHT Protocol
(BEP 5)		 Fast Extension
(BEP 6)		 Extension for Peers to Send Metadata Files
(BEP 9)		 Extension Protocol
(BEP 10)		 Peer Exchange (PEX)
(BEP 11)		 Multitracker Metadata Extension
(BEP 12)		 Local Service Discovery (LPD)
(BEP 14)		 UDP Tracker Protocol
(BEP 15)		 HTTP/FTP Seeding (GetRight-style)
(BEP 19)

Accepted BEPs (cont.)
BitTorrent client Tracker Returns Compact Peer Lists
(BEP 23)		 Private Torrents
(BEP 27)		 uTorrent transport protocol
(BEP 29)		 Holepunch extension
(BEP 55)
BitCometYes
BitLordYes
BitTorrent 5, MainlineNo
BitTorrent 6Yes
DelugeYes
FlashGetNo
Free Download ManagerNo
KTorrentYes
LimeWireNo
MLDonkeyNo
μTorrentYes[64]
Opera 12No
qBittorrentYes
rTorrentNo
ShareazaNo
TixatiYes
TonidoYes
TransmissionNo[65]
TriblerNo
Vuze (formerly Azureus)Yes[Note 14]
XunleiYes
BitTorrent client Tracker Returns Compact Peer Lists
(BEP 23)		 Private Torrents
(BEP 27)		 uTorrent transport protocol
(BEP 29)		 Holepunch extension
(BEP 55)

Draft BEPs

The following BEPs are under consideration for standardization.

BitTorrent client IPv6 Tracker Extension
(BEP 7)		 Superseeding
(BEP 16)		 HTTP Seeding (Hoffman-style)
(BEP 17)		 Extension for Partial Seeds
(BEP 21)		 Tracker Returns External IP
(BEP 24)		 Merkle tree torrent extension
(BEP 30)		 Tracker Failure Retry Extension
(BEP 31)		 IPv6 extension for DHT
(BEP 32)		 DHT scrape
(BEP 33)		 DNS Tracker Preferences
(BEP 34)
BitCometYesNo
BitLordNoNo
BitTorrent 5, MainlineNoYes
BitTorrent 6YesYes
DelugeYesYes
FlashGetNoNo
Free Download ManagerNoYes
KTorrentYesYes
LimeWireYesYes
MLDonkeyNoNo
μTorrentYes[66]Yes[67]
Opera 12NoNo
qBittorrentYesYes
rTorrentYesNo
ShareazaNoYes
TixatiYesYes
TonidoNoNo
TransmissionNoNo
TriblerNoNo
Vuze (formerly Azureus)Yes
XunleiNoNo
BitTorrent client IPv6 Tracker Extension
(BEP 7)		 Superseeding
(BEP 16)		 HTTP Seeding (Hoffman-style)
(BEP 17)		 Extension for Partial Seeds
(BEP 21)		 Tracker Returns External IP
(BEP 24)		 Merkle tree torrent extension
(BEP 30)		 Tracker Failure Retry Extension
(BEP 31)		 IPv6 extension for DHT
(BEP 32)		 DHT scrape
(BEP 33)		 DNS Tracker Preferences
(BEP 34)

Draft BEPs (cont.)
BitTorrent client Torrent Signing
(BEP 35)		 Torrent RSS feeds
(BEP 36)		 Finding Local Data Via Torrent File Hints
(BEP 38)		 Updating Torrents Via Feed URL
(BEP 39)		 Canonical Peer Priority
(BEP 40)		 UDP Tracker Protocol Extensions
(BEP 41)		 DHT Security Extension
(BEP 42)		 Read-only DHT Nodes
(BEP 43)		 Storing arbitrary data in the DHT
(BEP 44)		 Multiple-address operation for the BitTorrent DHT
(BEP 45)
BitCometBetaYes
BitLordYesYes
BitTorrent 5, MainlineNoNo
BitTorrent 6YesYes
DelugePlug-inYes
FlashGetNoNo
Free Download ManagerNoNo
KTorrentYesYes
LimeWireNoYes
MLDonkey3rd party bash scriptYes
μTorrentYes[68]Yes
Opera 12Yes[Note 15]No
qBittorrentYesYes
rTorrent3rd party utility [69]Yes
ShareazaNoNo
TixatiYesYes
TonidoNoNo
TransmissionNoYes
TriblerYesYes
Vuze (formerly Azureus)YesYes
XunleiYesNo
BitTorrent client Torrent Signing
(BEP 35)		 Torrent RSS feeds
(BEP 36)		 Finding Local Data Via Torrent File Hints
(BEP 38)		 Updating Torrents Via Feed URL
(BEP 39)		 Canonical Peer Priority
(BEP 40)		 UDP Tracker Protocol Extensions
(BEP 41)		 DHT Security Extension
(BEP 42)		 Read-only DHT Nodes
(BEP 43)		 Storing arbitrary data in the DHT
(BEP 44)		 Multiple-address operation for the BitTorrent DHT
(BEP 45)


Draft BEPs (cont.)
BitTorrent client Updating Torrents Via DHT Mutable Items
(BEP 46)		 Padding files and extended file attributes
(BEP 47)		 Tracker Protocol Extension: Scrape
(BEP 48)		 Distributed Torrent Feeds
(BEP 49)		 Publish/Subscribe Protocol
(BEP 50)		 DHT Infohash Indexing
(BEP 51)		 The BitTorrent Protocol Specification v2
(BEP 52)		 Magnet URI extension - Select specific file indices for download
(BEP 53)		 The lt_donthave extension
(BEP 54)
BitCometYes
BitLordYes
BitTorrent 5, MainlineNo
BitTorrent 6Yes
DelugeYes
FlashGetNo
Free Download ManagerYes
KTorrentYes
LimeWirePartial
MLDonkeyYes[70]
μTorrentYes
Opera 12No
qBittorrentYes
rTorrentYes[71]
ShareazaYes
TixatiYes
TonidoNo
TransmissionYes
TriblerYes
Vuze (formerly Azureus)Yes
XunleiYes
BitTorrent client Updating Torrents Via DHT Mutable Items
(BEP 46)		 Padding files and extended file attributes
(BEP 47)		 Tracker Protocol Extension: Scrape
(BEP 48)		 Distributed Torrent Feeds
(BEP 49)		 Publish/Subscribe Protocol
(BEP 50)		 DHT Infohash Indexing
(BEP 51)		 The BitTorrent Protocol Specification v2
(BEP 52)		 Magnet URI extension - Select specific file indices for download
(BEP 53)		 The lt_donthave extension
(BEP 54)

Deferred BEPs

The editor(s) deem that the following BEPs are not progressing toward standardization, but they have not yet been withdrawn.

BitTorrent client Tracker Peer Obfuscation
(BEP 8)		 Search Engine Specification
(BEP 18)		 BitTorrent Local Tracker Discovery Protocol
(BEP 22)		 Zeroconf Peer Advertising and Discovery
(BEP 26)		 Tracker exchange
(BEP 28)
BitCometBuilt-in Web browserNo
BitLordBuilt-in Web browserNo
BitTorrent 5, MainlineYesNo
BitTorrent 6YesNo
DelugeNoNo
FlashGetNoNo
Free Download ManagerNo
KTorrentBuilt-in Web browserNo
LimeWireNoNo
MLDonkeyBuilt-in Web browserNo
μTorrentYesNo
Opera 12Built-in Web browserNo
qBittorrentYeshard-coded as disabled in newer versions
rTorrentNoNo
ShareazaYesYes
[Note 16][72][Note 17]
TixatiNoYes
TonidoNoNo
TransmissionNo
TriblerYes (DHT)[73]No
Vuze (formerly Azureus)No
XunleiUn­known
BitTorrent client Tracker Peer Obfuscation
(BEP 8)		 Search Engine Specification
(BEP 18)		 BitTorrent Local Tracker Discovery Protocol
(BEP 22)		 Zeroconf Peer Advertising and Discovery
(BEP 26)		 Tracker exchange
(BEP 28)

List of other features
BitTorrent client Embedded tracker UPnP[Note 18] NAT Port Mapping Protocol Encryption Proxy server
BitComet Separate download Yes Yes Yes HTTP 1.1, SOCKS4-4a-5
BitLord No Yes Yes Yes HTTP 1.1, SOCKS4-4a-5
BitTorrent 5, Mainline Yes[Note 19] Yes Yes Yes Yes
BitTorrent 6 Yes Yes Yes Yes HTTP(S), SOCKS4-5
Deluge No Yes Yes Yes HTTP(S), SOCKS4-5
FlashGet No No No Yes No
Free Download Manager No No No No No
KTorrent No Yes Yes Yes HTTP, SOCKS4-5
LimeWire Yes Yes Yes Yes No
MLDonkey Yes Yes Yes No No
μTorrent Yes[74] Yes[75] Yes Yes[76] HTTP(S), SOCKS4-5
Opera 12 Yes[77] No No No No
qBittorrent Yes Yes Yes Yes HTTP(S), SOCKS4-5
rTorrent No No No Yes No
Shareaza No Yes Yes No No
Tixati No Yes Yes Yes only with out going without DHT if anonymity required
Tonido No Yes Yes No No
Transmission No Yes Yes Yes No[78]
Tribler Yes Yes Yes Yes Uses P2P onion routing to provide anonymity.
Vuze (formerly Azureus) Yes Yes Yes Yes HTTP(S)?, SOCKS4-4a-5
Xunlei Yes Yes Yes No HTTP, SOCKS5, FTP
BitTorrent client Embedded tracker UPnP NAT Port Mapping Protocol Encryption Proxy server

Features II
BitTorrent client Cache[Note 20] Prioritization Selective downloads Sequential downloading SOCKS Remote control via web Auto updates Reviews and Comments Notes
BitComet Yes Yes Yes Yes[Note 21] Yes Yes Yes No Portable version available
BitLord Yes Yes Yes No Yes No Yes No
BitTorrent 5, Mainline No Yes Yes No No No Yes No
BitTorrent 6 Yes Yes Yes Yes[Note 22] Yes Yes Yes Yes
Deluge Yes Yes Yes Yes Yes Yes via PMS No
FlashGet No No No No No No No No FlashGet (standalone application) is not FlashGot (Firefox Addon)
Free Download Manager No Yes Yes Yes No Yes Optional No
KTorrent Yes Yes Yes Yes Yes Yes via PMS No
LimeWire Yes Yes Yes No Yes No Yes No
MLDonkey Yes Yes No No No[79] Yes via PMS No
μTorrent Yes Yes[80] Yes Yes[Note 23] Yes Yes Yes Yes
Opera 12 No No No No No No Windows and Mac OS X only; via PMS on Linux No Web browser
qBittorrent Yes Yes Yes Yes Yes Yes via PMS No
rTorrent Partial Yes Yes No No Yes via PMS No No built-in disk cache but a delayed sync
Shareaza Yes Yes Yes[Note 24] in mod client No Yes Yes No [Note 25]
Tixati Yes Yes Yes Yes Yes Yes Yes No lightweight client, Portable version available, option to keep all peers unchoked available

Integral encrypted chatrooms that allow streaming audio and video, link sharing and searching

Tonido No Yes Yes No No Yes Yes No
Transmission Yes Yes Yes No No Yes Yes No
Tribler Yes Yes Yes No No Partial Yes No Fully distributed keyword search; integrated anti-spam measures[81]
Vuze (formerly Azureus) Yes Yes Yes in paid version [82] Yes Plugin[Note 26] Yes Yes[83] The only client to bridge between i2p and the clearnet.
Xunlei Yes Yes Yes Yes Yes Yes No
BitTorrent client Cache Prioritization Selective downloads Sequential downloading SOCKS Remote control via web Auto updates Reviews and Comments Notes

Libraries
General
BitTorrent library First public release date Latest stable Software license
libtorrent (Rasterbar) 8 September 2005 (2005-09-08)[84] 2.0.6[85] (April 16, 2022 (2022-04-16)) [±] BSD-3-Clause
MonoTorrent September 2006 (2006-09) 2.0.0 (May 4, 2021 (2021-05-04)) [±] MIT
rTorrent (libTorrent Rakshasa) 15 July 2004 (2004-07-15)[86] rTorrent 0.9.8 / libTorrent 0.13.8 (July 19, 2019 (2019-07-19)) [±][87] GPL-2.0-or-later[Note 27]
BitTorrent library First public release date Latest stable Software license
Operating system support and programming language
BitTorrent library Linux/Unix Windows OS X API Programming language
libtorrent (Rasterbar) YesYesYesYes C++
MonoTorrent YesYesYesYes C#
rTorrent (libTorrent Rakshasa) YesNoYesYes C++
BitTorrent library Linux/Unix Windows OS X API Programming language
Supported features 1
BitTorrent library Protocol version X Tracker UPnP[Note 28] NAT Port Mapping Protocol NAT traversal[Note 29] DHT[Note 30] Peer exchange Encryption UDP tracker LPD Fast extensions Magnet URI μTP
libtorrent (Rasterbar) 1, 2[88] YesYesYesYesYesYesYesYesYes Yes[89]YesYesYes[90]
MonoTorrent 1 YesYesYesYesNoYesYesYesYesYesYesYesNo
rTorrent (libTorrent Rakshasa) 1 YesYesNo??YesYesYesYesYesNoYesNo
BitTorrent library Protocol version X Tracker UPnP NAT Port Mapping Protocol NAT traversal X X Encryption UDP tracker X Fast extensions Magnet URI μTP
Supported features 2
BitTorrent library Cache[Note 31] Web seeding[Note 32] WebTorrent Broadcatching (RSS) Prioritization Selective downloads SOCKS Remote control via web Engine Notes
libtorrent (Rasterbar) YesYesYesNoYesYesYesYes?
MonoTorrent YesYesNoYesYesYesNoYesNo
rTorrent (libTorrent Rakshasa) PartialNoNoNoYesYesNoYesNoNo built-in cache-disk cache but a delayed sync
BitTorrent library Cache Web seeding WebTorrent Broadcatching (RSS) Prioritization Selective downloads SOCKS Remote control via web Engine Notes

See also

Notes
  1. With OpenSSL exception.
  2. GPL-2.0-only or GPL-3.0-only or any future license endorsed by Mnemosyne LLC.
  3. x86-32 and x86-64 builds available
  4. Qdbus interface
  5. Does not support HTTP redirection (status codes: 301, 302, 303, 307).
  6. Does not support HTTPS.
  7. Exchanging with BT 6 and μTorrent clients (and now MooPolice).
  8. This is done manually. Right click an item and select "Force Re-Check". This will trigger preload. Note, if deluge is restarted before preload finishes, it will continue downloading torrent content.
  9. μTorrent's DHT implementation Archived 18 March 2009 at the Wayback Machine is the same as Mainline and BitComet's, but unfortunately this is incompatible with Azureus's implementation.
  10. Support only base path ("url-list" path) redirection (message: "HTTP redirect does not match file path").
  11. Exchanges with μTorrent and Azureus peers.
  12. Adds HTTP referer header in request on HTTP redirection (useful behavior).
  13. Has its own DHT, a mainline-DHT compatible implementation is available as plugin.
  14. Since version 2.5.0.2. It's UDP based, an experimental feature and only supported by other Azureus clients.
  15. Opera has a feed aggregator that displays feeds like emails.
  16. Since Shareaza v2.5.3.1.
  17. Shareaza also uses G2 to transmit download metadata, such as BitTorrent trackers to other G2 clients.
  18. Automatically configure port forwarding (requires Router with UPnP support)
  19. Tracker included with Linux binaries and with source, but not with Windows binary.
  20. Reduces disk usage, file fragmentation (in case it is not preallocated) and latencies via larger written blocks and cached data for hash checking finished pieces.
  21. Called "preview mode" Archived 4 October 2013 at the Wayback Machine
  22. Only available in Pro and web version
  23. Only available in Pro and web version.From version 3.0 this feature is called "Streaming mode". The number of pieces to download sequentially is configurable
  24. Since Shareaza v2.4.0.2 r7924.
  25. Maximum active torrent number depends on respective user settings and is limited to 31.
  26. Provides a Java-based and a simple HTML/JS based WebUI.
  27. With OpenSSL exception.
  28. Automatically configure port forwarding (requires Router with UPnP support)
  29. Many clients claim to support this, but just UPnP calls for opening a TCP port is not effective and disabled by factory default in most new hardware. "UDP NAT Traversal" is the proper working solution, supported by just a few.
  30. DHT permits use of trackerless torrents (with supporting clients) to resume normal torrents when their tracker is down. However, some trackers that register their users for keeping tabs on fair usage (such as a ratio of bytes downloaded to uploaded) may not reliably measure and update usage for users employing DHT.
  31. Reduces disk usage, file fragmentation (in case it is not preallocated) and latencies due to larger written blocks and cached data for hash checking finished pieces.
  32. Recently implemented (unofficial) web seeding feature, see HTTP-Based Seeding Specification Archived 28 October 2008 at the Wayback Machine

References
  1. "Glossary". BitTorrent User Manual. San Francisco: BitTorrent, Inc. Archived from the original on 28 June 2013. Retrieved 2 July 2013.
  2. Cohen, Bram (2 July 2001). "BitTorrent – a new P2P app". Decentralization · Implications of the end-to-end principle. Yahoo! Groups. Archived from the original on 29 January 2008. Retrieved 2 July 2013.
  3. Van Der Sar, Ernesto (14 October 2013). "Google-backed BitTorrent client spread malware to Windows PCs and Android devices". TorrentFreak. Archived from the original on 18 December 2013. Retrieved 19 November 2013.
  4. Gibbs, Samuel (15 October 2013). "Google-Backed File-Sharing Service Spreads Malware". The Guardian. Guardian News and Media. Archived from the original on 18 November 2013. Retrieved 19 November 2013.
  5. "BitComet Changelog". www.bitcomet.com. 28 March 2022. Retrieved 20 April 2022.
  6. "Download BitTorrent: Windows". bittorrent.com. Retrieved 27 September 2017.
  7. "Download BitTorrent: Mac". bittorrent.com. Retrieved 27 September 2017.
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