Comparison of Internet Relay Chat daemons

The following tables compare general and technical information including the differences in feature sets between popular IRC daemons. Grey entries in the list represent supposedly unmaintained daemons.

This article is neither all-inclusive nor necessarily up-to-date, be warned.

Servers

IRC daemon	Creator/network	Basis	Programming language	First public release	Latest version (numeric 351)	Software license
Asuka[1]	QuakeNet Dev Team	ircu	C	Unknown	1.2.1 (now replaced by snircd)	GPL
Bahamut[2]	DALnet	DreamForge, IRCD-Hybrid	C	1999[3]	bahamut-2.0.7	GPL
bIRCd[4]	DAMnet	DreamForge	C	1999	bIRCd-2.1.0rc4	GPL
beware ircd[5]	beware	from scratch	Delphi	Unknown	beware1.6	GPL
Charybdis[6]	atheme.org (nenolod, jilles, dwr, gxti)	ircd-ratbox, IRCD-Hybrid, ircu, ShadowIRCd	C	2005	charybdis-3.4.2	GPL/BSD
dancer-ircd	freenode	Hybrid 6	C	1999	? (replaced by hyperion)	GPL
Elemental-IRCd[7]	[8]	ShadowIRCD	C	2007	6.6.2	GPL2
DreamForge	DALnet	irc2.8.mu3	C	1994 (dal), 1997? (df)	? (replaced by bahamut)	GPL
Faerion IRC Server[9]	vhex	DreamForge	C, C++	2003	1.17.7.1[10]	GPL
hyperion[11]	freenode	dancer-ircd 1.0.35+pre2	C	2005	? (replaced by ircd-seven)	GPL
InspIRCd [12]	InspIRCd Development Team	from scratch	C++	2002	2.0.21[13]	GPL
ignitionServer[14]	The Ignition Project	Pure-IRCD (VB6 version)	Visual Basic	2004	ignitionServer-0.3.6-P1[15]	GPL[16]
IRCd[17]	Jarkko Oikarinen, IRCnet[18]	from scratch	C[19]	1988	2.11.2[20]	GPL v1
ircd-hybrid[21]	ircd-hybrid Development Team,[22] Rizon, OFTC, EFnet	irc2.8[23]	C[23]	1997[23]	8.2.21[24]	GPL[25]
ircd-ratbox	Aaron Sethman, Lee Hardy, EFnet	Hybrid 7-rc1	C	2002	ircd-ratbox-3.0.10	GPL
ircd-seven	freenode	charybdis 3.1.x/trunk	C	—	stable	GPL
ircu[26]	Undernet Coder Committee	irc2.7[27]	C[28]	1991	u2.10.12.14[26]	GPL
ithildin[29]	Chip Norkus	from scratch	C	2006	1.1[30]	BSD[31]
kike[32]	Přemysl Janouch	from scratch	C	2015	0.9[33]	ISC
miniircd[34]	Joel Rosdahl	from scratch	Python	2003	1.1[35]	GPL
Nefarious IRCu	Evilnet Development, AfterNET	ircu2.10.12.14	C	2004	u2.10.12.14+Nefarious(2.0.0)	GPL
ngIRCd[36]	Alex Barton	from scratch	C	2001[37]	ngircd-19.1[38]	GPL
OfficeIRC Server	Office IRC Inc, Paul Heinlein	from scratch	VB.NET	2006	2.2	Proprietary
PleXusIRCd	Rizon, thaprince, static	Hybrid 7.2.3	C	2005	hybrid-7.2.3+plexus-3.0.1(20090612_0-523)	GPL
ProvisionIRCd[39]	Sirius, Y4kuzi	from scratch	mSL	2006	2.2	GPL
pureIRCd	Dennis Fisch aka Diligent	from scratch	C	2002	Unknown	GPL
RockIRCd[40]	Mike Chambers	from scratch	QuickBASIC[41]	2009	1.0.0-testing	GPL
RubIRCd[42]	Lloyd Dilley	from scratch	Ruby	2013	0.1a-maiden voyage	GPL
ShadowIRCd[43]	Taros, jdhore, jilles, nenolod	Charybdis[43]	C	2003	6.3.3	GPL
snircd	QuakeNet	ircu2.10.12[44]	C[44]	Unknown	1.3.4a[1]	GPL[44]
solid-ircd	Toshi Morita, Juan Baez,Gabriel Baez	Bahamut	C	2004[45]	solid-ircd 3.4.8	GPL
Synchronet IRCd[46]	Randy E. Sommerfeld	from scratch	JavaScript	2003	SynchronetIRCd-1.3a(1.151)	GPL
TR-IRCd [47]	Yusuf Iskenderoglu, Ekim Engin, Dimitris Ginosatiris, Maksut Cagil, Burak Cifter	Hybrid 7 and Bahamut	C	1999	5.6.1	GPL
UltimateIRCd	ShadowRealm Creations	DreamForge 2.8	C	2001	3.0.2 [48] (now unmaintained)	GPL
UnrealIRCd[49]	UnrealIRCd Team	EliteIRCd (potvin)[50]	C	1999	Unreal4.0.5[51]	GPL
Viagra IRCd[52]	Chris Schiffner	Titan	C	2003	1.3.3 (now unmaintained)	GPL
WeIRCd	Eloxoph IRC Network[53]	from scratch	C	2007	0.8.2 (now unmaintained)	GPL
Pocosi[54]	Chris Williams, Hinrik Örn Sigurðsson	POE::Component::Server::IRC[55]	Perl	2003	0.02 (1.53 of POE::Component::Server::IRC)	Artistic

Operating system support

The operating systems the daemons can run on without emulation; also supported I/O facilities for network sockets (see IRCd for further information).

IRC daemon	Windows	DOS	Mac OS	Linux	BSD	Solaris	HP-UX	AIX	select()	poll()	epoll[56]	kqueue[57]	threads	RT signals[58]	/dev/poll[59]	Windows IOCP[60]	Solaris IOCP[61]
Bahamut	No	No	Yes	Yes	Yes	Yes	Unknown	Unknown	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	No
bIRCd	Yes	No	Unknown	Yes	Yes	Yes	Yes	Unknown	Yes	Yes	No	No	Unknown	No	No	No	No
Charybdis	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	Yes
ConferenceRoom	Yes	No	Yes	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes	Unknown	No	Yes	Yes	No
InspIRCd[62][63]	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	No	Yes	Yes	Yes
IRCD[64]	Yes	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	Unknown	No	No	No	No
ircd-hybrid	No	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Unknown	No	Yes	No	No
ircd-ratbox	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	Yes	Yes	No	Yes
ircu	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	No
ithildin	No	No	No	Yes	Yes	Unknown	Unknown	Unknown	Yes	Yes	No	Yes	Unknown	No	No	No	No
kike	No	No	Unknown	Yes	Yes	Unknown	Unknown	Unknown	No	Yes	Yes	No	No	No	No	No	No
miniircd	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	No	No	No	No	No
Nefarious IRCu	No	No	Yes	Yes	Yes	Yes	Yes	Unknown	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	No
ngIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	No
OfficeIRC Server	Yes	No	Yes	Emulated	Yes	No	No	No	Unknown	Unknown	No	No	Unknown	No	No	Yes	No
PleXusIRCd	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	Yes	Yes	No	No
pureIRCd	Yes	No	No	No	No	No	No	No	Yes	No	No	No	Unknown	No	No	No	No
RockIRCd	No	Yes	No	No	No	No	No	No	No	No	No	No	Unknown	No	No	No	No
RubIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	No
ShadowIRCd	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	Yes	Yes	No	Yes
snircd	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	No
solid-ircd	No	No	Yes	Yes	Yes	Yes	Unknown	Unknown	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	No
Synchronet IRCd	Yes	No	Yes	Yes	Yes	Yes	Unknown	Unknown	Yes	Yes	Yes	Yes	Unknown	No	Yes	No	No
UnrealIRCd	Yes	No	Yes	Yes	Yes	Yes	Unknown	Unknown	Yes	Yes	Yes	Yes	Unknown	No	No	No	No
WeIRCd	Yes	No	Yes	Yes	Yes	Unknown	Unknown	Unknown	Yes	No	No	No	Unknown	No	No	No	No

Technology

Various networking and IRC technology implemented to date.

IRC daemon	Modularity	Remote includes	IPv6	Client SSL	SSL linking	Zip linking	Hostmasking, cloaking	Services integration (built-in services)	LDAP authentication	IRCX support	SASL support	SASL EXTERNAL support	Server protocol
Bahamut	Yes	No	Yes	Yes	Yes	Yes	No	No	No	No	No	No	TS5 with extensions
bIRCd	No	No	Yes	Yes	Yes	No	No	No	No	No	No	No	RFC 1459 and TSpre8
beware ircd	No	No	Yes	No	No	No	Yes	No	No	No	No	No	P10
Charybdis	Yes	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes	TS6 with extensions
ConferenceRoom	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	Proprietary, binary
InspIRCd	Yes[65]	Yes	Yes	Yes	Yes	Yes	Yes	Partial	Yes	Partial	Yes	Yes	custom[66]
IRCD	No	No	Yes	No	No	Yes	No	No	No	No	No	No	RFC 2813 with IDs
IRCD-Hybrid	Yes	No	Yes	Yes	Yes	Yes	Yes	No	No	No	No	No	TS6
ircd-ratbox	Yes	No	Yes	Yes	Yes	Yes	No	No	No	No	No	No	TS6
ircu	No	No	Yes	No	No	No	Yes	No	No	No	No	No	P10
ithildin	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	No	Module-dependent
kike	No	No	Yes	Yes	No	No	No	No	No	No	No	No	No
miniircd	No	No	No	Yes	No	No	No	No	No	No	No	No	No
Nefarious IRCu	No	No	2.0+	Yes	Yes	No	Yes	No	No	No	2.0+	2.0+	P10 with extensions
ngIRCd	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	No	No	RFC 2813
OfficeIRC Server	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown	Compatible with DreamForge and UnrealIRCd
PleXusIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	No	Yes	No	No	No	TS5/TS6
pureIRCd	No	No	No	No	No	No	No	No	No	No	No	No	No
RockIRCd	No	No	No	No	No	No	Yes	No	No	No	No	No	No
RubIRCd	Yes	No	Yes	Yes	No	No	Yes	Partial	No	No	No	No	TS5 with extensions
ShadowIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes	TS6 with extensions
snircd	No	No	Yes	No	No	No	Yes	No	No	No	No	No	P10 with extensions
solid-ircd	No	No	No	Yes	Yes	Yes	Yes	No	No	No	No	No	TS5 with extensions
Synchronet IRCd	No	No	No	No	No	No	No	No	No	No	No	No	TS5 with extensions
UnrealIRCd	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Module	No	Yes	Yes	DreamForge/TS5 with extensions
WeIRCd	Partial	No	Yes	No	No	No	Yes	Yes (module)	No	No	No	No	No

Features

IRC server features, mostly extensions to RFC 1459. Probably also implementations of RFC 2810, RFC 2811, RFC 2812, RFC 2813, and possibly IRCX.

• +channels (In early IRCds, these were simply named channels. At least one modern IRCd (IRCD) uses the + prefix for modeless channels, i.e. no modes are supported other than +t, which is forced. Since no user can become a chanop, no topic can be set. This is described in RFC 2811.)
• #channels ("+channels" were later replaced with "#channels" in version 2.7, numeric channels were removed entirely and channel bans (mode +b) were implemented.)
• &channels (irc2.8, those that exist only on the current server, rather than the entire network)
• !channels (irc2.10, those that are theoretically safe from suffering from the many ways that a user could exploit a channel by "riding a netsplit"; IRCds using timestamping provide (most of) this functionality on #channels)
• %#channels (#channels whose name are in UTF-8 for IRCX)
• %&channels (&channels whose name are in UTF-8 for IRCX)
• %!channels (!channels whose name are in UTF-8 for IRCX)

IRC daemon	Channel types	Halfop support (+h %)	Admin/protect support (+a/+u &/!/*)	Founder/owner support (+q ~/.)	Operator prefixing[67]	Advanced operator ACL	Operator "levels"[68]	vHost via I-line (or equivalent)	i18n nicknames[69]	RDBMS integration (SQL)
Bahamut	#	No	No	No	No	No	No	Partial	No	No
bIRCd	# &	No	No	No	No	No	No	Partial	No	No
Charybdis	# &	No	No	No	No	Yes	Yes	Yes	No	No
ConferenceRoom	# &	No	No	Yes	No	Yes	Yes	Yes	Partial	Partial
InspIRCd	#	Yes	Module	Module	Module	Yes	Module	Yes	Module	Old versions: MySQL, SQLite & PostgreSQL: Authorization, Services Integration, Logging, Operaccess
IRCD	# & ! +	No	No	No	No	Unknown	No	No	No	No
IRCD-Hybrid	#	Yes	No	No	No	No	No	Yes	No	No
ircd-ratbox	# &	No	No	No	No	No	No	Yes	No	No
ircu	# &	No	Yes	No	No	Yes	No	No	No	No
ithildin	#	No	No	No	Yes	Yes	Yes	No	No	No
kike	#	No	No	No	No	No	No	No	No	No
miniircd	+ # & !	No	No	No	No	No	No	No	No	No
Nefarious IRCu	# &	Yes	No	No	No	Yes	No	Yes	No	No
ngIRCd	# & +	Yes[70]	Yes	Yes	No	No	No	No	No	No
OfficeIRC Server	# %# & %&	No	Yes	Yes	Yes	Partial	Yes	Yes	Yes	Partial
PleXusIRCd	# &	Yes	Yes	Yes	No	No	Unknown	Yes	Unknown	No
pureIRCd	#	No	No	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown
RockIRCd	#	No	Yes	Yes	Unknown	Unknown	Yes	No	Unknown	No
RubIRCd	#	Yes	Yes	Yes	Yes	No	Yes	Yes	No	No
ShadowIRCd	# &	Yes	Yes	No	No	Yes	Yes	Yes	No	No
snircd	# &	No	Yes	No	No	Yes	No	Yes	No	No
solid-ircd	#	Yes	No	No	No	No	No	Partial	No	No
Synchronet IRCd	# &	No	No	No	No	No	No	No	No	No
UnrealIRCd	#	Yes	Yes	Yes	No	Yes	Third party module (netadmins)[71]	Yes, vhost block in conf	iso8859-1/2/7/8-I/9/16, windows-1250/1251, Multibyte	MySQL & PostgreSQL: Third party modules [72]
WeIRCd	#	Yes	No	No	No	No	No	No	No	SQLite in services module

IRC daemon	Connect-flood detection	Channel flood controls basic / advanced	Join throttling	Spamfilter regexp / glob	Channel censor IRCd config / chanop-controlled	Variable per-channel banlist size	Timed bans	DNSBL	CGI:IRC/WEBIRC host spoofing
Bahamut	Yes	Yes / No	Yes	No / No	No / No	No	No	No	Yes
bIRCd	No	No / No	No	No / No	No / No	No	No	No	No
Charybdis	Yes	No / No	Yes	No / No	No / No	Yes	Yes	Yes	Yes
ConferenceRoom	Yes	Yes / Yes	Yes	No / Yes	Partial / No	No	Partial	Yes	No
InspIRCd	Yes	Yes / Yes	Yes	Yes / Yes	Yes / Yes	Yes	Yes	Yes	Yes
IRCD	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	No
IRCD-Hybrid	Yes	No / No	No	No / No	No / No	No	No	No	Yes
ircd-ratbox	Yes	No / No	No	No / No	No / No	No	No	No	Yes
ircu	Yes	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	No	No
ithildin	Module	No / No	No	No / No	No / No	No	No	Unknown	Unknown
kike	No	No	No	No	No	No	No	No	No
miniircd	No	No	No	No	No	No	No	No	No
Nefarious IRCu	Yes	No / No	No	Yes / No	No / No	No	No	Yes	Yes
ngIRCd	No	No / No	No	No / No	No / No	No	No	No	Yes
OfficeIRC Server	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unknown
PleXusIRCd	Yes	No / No	No	No / No	No / No	No	No	Unknown	Unknown
pureIRCd	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown
RockIRCd	No	Yes / No	No	No	No	No	No	No	Unknown
RubIRCd	No	No	No	No	No	No	No	No	No
ShadowIRCd	Yes	No / No	Yes	No / No	No / No	Yes	Yes	Yes	Yes
solid-ircd	Yes	Yes / No	Yes	No / No	No / No	No	No	No	Unknown
Synchronet IRCd	Yes	Yes / No	Yes	No / No	No / No	No / No	No	No	Unknown
UnrealIRCd	Yes	Yes	Yes	Yes	Yes / third party module[73]	No	No	Yes	Yes
WeIRCd	Partial	No / No	No	No / No	No / No	No	No	No	Yes

Notes

1. "QuakeNet Development Team". quakenet.org.
2. "The DALnet IRC Network". dal.net.
3. "Linux Help - Bahamut Setup Guide". linuxhelp.net.
4. "bircd - bIRCd IRC server. SSL and IPv6 supported.". uu3.net.
5. "beware ircd". bircd.org.
6. "Jilles' IRC page: charybdis". stack.nl. Retrieved 2015-01-08.
7. "Continuation of ShadowIRCD to meet people's needs". github.com. Retrieved 2015-01-08.
8. "Contributors". Retrieved 2015-01-08.
9. "Faerion — ircd". sourceforge.net.
10. vhex. "Faerion Software Components". sourceforge.net.
11. freenode: hyperion-ircd
12. "InspIRCd - The Stable, High-Performance and Modular IRCd". inspircd.org.
13. "InspIRCd - v2.0.21 released!". inspircd.org.
14. The Ignition Project : ignitionServer
15. "Log in - Tumblr". ignition-project.com.
16. ziggythehamster. "The Ignition Project". SourceForge.
17. "Index of /ftp/irc/server/". irc.org.
18. "IRC.org". irc.org.
19. Source code
20. Release Notes
21. "IRCD-Hybrid -- High Performance Internet Relay Chat". Retrieved 2015-01-08.
22. "Team". ircd-hybrid.org. 9 September 2014. Retrieved 2015-01-08.
23. "IRCd-Hybrid". irc-wiki.org. 17 September 2011. Retrieved 2015-01-08.
24. "Downloads". irc-hybrid.org. 6 January 2015. Retrieved 2015-01-08.
25. "COPYING". github.com. Retrieved 2015-01-08.
26. "Undernet IRCd Development - Home". undernet.org.
27. "Serverwatch's Recent Server Reviews". serverwatch.com.
28. ircu2.10.12.12 source code (tar.gz)
29. "elly/ithildin". GitHub.
30. Downloads - Ithildhin
31. "ithildin/COPYING at master · elly/ithildin · GitHub". GitHub.
32. "pjanouch/uirc3". GitHub.
33. "Releases · pjanouch/uirc3 · GitHub". GitHub.
34. "Joel Rosdahl — Software". rosdahl.net.
35. "miniircd/CHANGES at master · jrosdahl/miniircd · GitHub". GitHub.
36. Alexander Barton. "ngIRCd: Next Generation IRC Daemon". barton.de.
37. "arthur.barton.de Git - ngircd.git/commit". barton.de.
38. Alexander Barton. "Download - ngIRCd: Next Generation IRC Daemon". barton.de.
39. "News - ProvisionIRCd :: Brings IRC to life" Check |url= value (help). provisionircd.tk.
40. "Welcome to rubbermallet.org [software: RockIRCd]". rubbermallet.org.
41. RockIRCd 1.0.0-testing source (.zip)
42. "RubIRCd - The Ruby IRC daemon". rubircd.rocks.
43. ShadowIRCd Archived August 13, 2010, at the Wayback Machine.
44. http://www.quakenet.org/development/releases/snircd.12.10.1.3.4a.tar.gz
45. sheik. "Solid IRCd". SourceForge.
46. ircd.js : The Synchronet IRCd Service
47. "TR-IRCD Daemon and Services". sourceforge.net.
48. shadowmaster. "The Ultimate IRC daemon". sourceforge.net.
49. "UnrealIRCd - The most widely deployed IRC server - UnrealIRCd". unrealircd.com.
50. unrealircd.doc
51. "UnrealIRCd - The most widely deployed IRC server - UnrealIRCd". unrealircd.com.
52. Christopher Schiffner. "Viagra IRCd". Chris Schiffner's Corner of the Web.
53. "404 Not Found". eloxoph.com.
54. Hinrik Örn Sigurðsson. "App::Pocosi - A command line tool for launching a POE::Component::Server::IRC instance - metacpan.org". metacpan.org.
55. Hinrik Örn Sigurðsson. "POE::Component::Server::IRC - A fully event-driven networkable IRC server daemon module. - metacpan.org". metacpan.org.
56. epoll. xmailserver.org. (Linux since 2.6) - I/O event notification facility. Has a much better performance than select() and poll() system calls.
57. kqueue (FreeBSD since 4.1) - asynchronous event dispatch mechanism.
58. "POSIX.4 Real Time Signals" (Linux since 2.4) - special class of Linux system signals used for notification of events on file descriptors. Deprecated in favour of epoll.
59. Acharya, Shridhar (March 2002). "Using the devpoll (/dev/poll) Interface". Sun.com. Archived from the original on February 2, 2007.
60. "CreateIoCompletionPort function". Microsoft MSDN Library.
61. "The Event Completion Framework for the Solaris Operating System (Solaris IOCP)". Sun.com.
62. "Supported Operating Systems". inspircd.org.
63. "FAQ/General". inspircd.org.
64. [ 50 ]
65. "2.0/Modules". inspircd.org.
66. "InspIRCd Spanning Tree (1.2)". inspircd.org.
67. Operator prefixing: The ability for network staff (not channel ops, but ircd opers) to be denoted in a channel with a special prefix.
68. Operator "levels": protect "higher" opers from being killed and/or z, k, or g-lined by "lower" opers
69. "Features: nickchars". Vulnscan.org.
70. "Handle channel user modes 'a', 'h', and 'q' from remote servers". GitHub.
71. "Modules". unreal.x-tab.org.
72. "Custom coding: SQLMod". Vulnscan.org.
73. "Modules: TextBan". Vulnscan.org.

See also

• Comparison of Internet Relay Chat clients
• Comparison of instant messaging clients
• Comparison of instant messaging protocols
• Internet Relay Chat
• Internet Relay Chat services
• IRCd
• IRCX

External links

• History of IRC
• IRCD distribution
• IRC numerics and modes from major IRCds