Comparison of Internet Relay Chat daemons

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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.

Please see the individual products' articles or websites or the cited references for further information. This article is neither all-inclusive nor necessarily up-to-date.

1 Servers
2 Operating system support
3 Technology
4 Features
5 Notes
6 See also
7 External links

Servers

IRC daemon	Creator/network	Basis	Programming language	First public release	Latest version (numeric 351)	Software license	Website
Asuka	QuakeNet Dev Team	ircu	C	?	1.2.1 (now replaced by snircd)	GPL	?
Austhex	AustNet Development	ircu2.9	C, Scheme	?	? (now replaced by inspircd)	GPL	?
Bahamut	DALnet	DreamForge, IRCD-Hybrid	C	1999	bahamut-1.8.6	GPL	[1]
bIRCd	DAMnet	DreamForge	C	1999	bIRCd-2.1.0rc4	GPL	[2]
beware ircd	beware	(from scratch)	Delphi	?	beware1.5.7	GPL	[3]
Charybdis	nenolod, jilles, dwr, gxti	ircd-ratbox, IRCD-Hybrid, ircu, ShadowIRCd	C	2005	charybdis-3.2.0	GPL/BSD	?
ConferenceRoom	WebMaster Incorporated	(from scratch)	C++	1996	ConferenceRoom/3.5	Proprietary	[4]
csircd	Comstud	(from scratch)	C	1998	csircd-1.14	GPL	?
dancer-ircd	freenode	Hybrid 6	C	1999	? (replaced by hyperion)	GPL	?
DreamForge	DALnet	irc2.8.mu3	C	1994 (dal), 1997? (df)	? (replaced by bahamut)	GPL	?
Faerion IRC Server	vhex	DreamForge	C, C++	2003	1.17.7.1	GPL	[5]
hyperion	freenode	dancer-ircd 1.0.35+pre2	C	2005	? (replaced by ircd-seven)	GPL	[6]
InspIRCd	InspIRCd Development Team	(from scratch)	C++	2002	1.2.1	GPL	[7]
ignitionServer	The Ignition Project	Pure-IRCD (VB6 version)	Visual Basic	2004	ignitionServer-0.3.6-P1	GPL	[8]
IRCd	Jarkko Oikarinen, IRCnet	(from scratch)	C	1988	2.95	GPL	[9]
IRCD-Hybrid	Hybrid Development Team, EFnet	irc2.8	C	1997	7.2.3	GPL	?
ircd-ratbox	Aaron Sethman, Lee Hardy, EFnet	Hybrid 7-rc1	C	2002	ircd-ratbox-3.0.0	GPL	[10]
ircd-seven	freenode	charybdis 3.1.x/trunk	C	—	stable	GPL	[11]
ircu	Undernet Coder Committee	irc2.7	C	1991	u2.10.12.13	GPL	?
IRCXpro Server	IRCXpro, Paul Heinlein	IRCPlus	Visual Basic	2002	1.2 (build 1572) (now replaced by OfficeIRC)	Proprietary	?
ithildin	Chip Norkus	(from scratch)	C	2006	1.1	BSD	[12]
Nefarious IRCu	Evilnet Development, AfterNET	ircu2	C	2004	u2.10.11.07+Nefarious(1.2.0)+[2212 2008-08-03]	GPL	[13]
ngIRCd	Alex Barton	(from scratch)	C	2001	ngircd-16	GPL	[14]
OfficeIRC Server	Office IRC Inc, Paul Heinlein	(from scratch)	VB.net	2006	2.2	Proprietary	[15]
pircd	Jay F Kominek	(from scratch)	Perl	1999	? (now unmaintained)	Open Source (custom)	[16]
PleXusIRCd	Rizon, thaprince, static	Hybrid 7.2.3	C	2005	hybrid-7.2.3+plexus-3.0.1(20090612_0-523)	GPL	[17]
pureIRCd	Dennis Fisch aka Diligent	(from scratch)	C	2002	?	GPL	?
PTlink IRC server	PTlink IRC Software	Hybrid 6	C	2001 (v.6)	5.4.0 (now unmaintained)	GPL	[18]
QuakeIRCd	QuakeIRCd Team, Tiburon, blackcomb	UnrealIRCd	C	2003 (v1.1)	? (now unmaintained)	GPL	[19]
RockIRCd	Mike Chambers	(from scratch)	QuickBASIC	2009	1.0.0-testing	GPL	[20]
ShadowIRCd	Taros, jdhore, jilles, nenolod	Charybdis	C	2003	shadowircd-6.0.1	GPL	[21]
snircd	QuakeNet	ircu2.10.12	C	?	1.3.4a	GPL	[22]
solid-ircd	Toshi Morita, Juan Baez,Gabriel Baez	Bahamut	C	2004	solid-ircd 3.4.8	GPL	[23]
SorIrcd	SorceryNet	dal4.4.10 and irc2.8.mu3	C	1996	? (replaced by Charybdis)	GPL	[24]
Synchronet IRCd	Randy E. Sommerfeld	(from scratch)	JavaScript	2003	SynchronetIRCd-1.3a(1.151)	GPL	?
synIRCd	Nathan (nate) Bishop	(from scratch)	C++	-	In Development	GPL	[25]
TR-IRCd	Yusuf Iskenderoglu, Ekim Engin, Dimitris Ginosatiris, Maksut Cagil, Burak Cifter	Hybrid 7 and Bahamut	C	1999	5.6.1	GPL	[26]
UltimateIRCd	ShadowRealm Creations	DreamForge 2.8	C	2001	3.0.2 (now unmaintained)	GPL	[27]
UnrealIRCd	UnrealIRCd Team	EliteIRCd (potvin)	C	1999	Unreal3.2.8.1	GPL	[28]
Viagra IRCd	Chris Schiffner	Titan	C	2003	1.3.3 (now unmaintained)	GPL	[29]
WeIRCd	Eloxoph IRC Network	(from scratch)	C	2007	WeIRCd 0.8	GPL	[30]

Operating system support

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

IRC daemon	Windows	MS-DOS	Mac OS X	Linux	BSD	Solaris	HP-UX	AIX	select()	poll()	epoll	kqueue	RT signals	/dev/poll	Windows IOCP	Solaris IOCP
Bahamut	No	No	Yes	Yes	Yes	Yes	?	?	Yes	Yes	Yes	Yes	No	Yes	No	No
bIRCd	Yes	No	?	Yes	Yes	Yes	Yes	?	Yes	Yes	No	No	No	No	No	No
Charybdis	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes
ConferenceRoom	Yes	No	Yes	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No
InspIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	Yes	Yes
IRCD	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	No	No	No
ircd-ratbox	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
ircu	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	No
ithildin	No	No	No	Yes	Yes	?	?	?	Yes	Yes	No	Yes	No	No	No	No
Nefarious IRCu	Yes	No	Yes	Yes	Yes	Yes	Yes	?	Yes	Yes	Yes	Yes	No	Yes	No	No
ngIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	No
OfficeIRC Server	Yes	No	Yes	Yes	Yes	No	No	No	?	?	No	No	No	No	Yes	No
PleXusIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
pureIRCd	Yes	No	No	No	No	No	No	No	Yes	No	No	No	No	No	No	No
RockIRCd	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No	No	No
ShadowIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
snircd	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	No
solid-ircd	No	No	Yes	Yes	Yes	Yes	?	?	Yes	Yes	Yes	Yes	No	Yes	No	No
Synchronet IRCd	Yes	No	Yes	Yes	Yes	Yes	?	?	Yes	Yes	Yes	Yes	No	Yes	No	No
synIRCd	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
UnrealIRCd	Yes	No	Yes	Yes	Yes	Yes	?	?	Yes	No	No	No	No	No	No	No
WeIRCd	Yes	No	Yes	Yes	Yes	?	?	?	Yes	No	No	No	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	Server Protocol
Bahamut	Yes	No	No	Yes	Yes	Yes	No	No	No	No	No	TS5 with extensions
bIRCd	No	No	Yes	Yes	Yes	No	No	No	No	No	No	RFC 1459 and TSpre8
Charybdis	Yes	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	TS6 with extensions
ConferenceRoom	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes	No	No	Proprietary, binary
InspIRCd	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	TS6-based Spanning Tree
IRCD	No	No	Yes	No	No	Yes	No	No	No	No	No	RFC 2813 with IDs
ircd-ratbox	Yes	No	Yes	Yes	Yes	Yes	No	No	No	No	No	TS6
ircu	No	No	Yes	No	No	No	Yes	No	No	No	No	P10
ithildin	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	Module-dependent
Nefarious IRCu	No	No	No	Yes	No	No	Yes	No	No	No	No	P10 with extensions
ngIRCd	No	No	Yes	Yes	Yes	Yes	No	No	No	No	No	RFC 2813
OfficeIRC Server	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Compatible with DreamForge and UnrealIRCd
PleXusIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	No	Yes	No	No	TS5/TS6
pureIRCd	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
ShadowIRCd	Yes	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	TS6 with extensions
snircd	No	No	Yes	No	No	No	Yes	No	No	No	No	P10 with extensions
solid-ircd	No	No	No	Yes	Yes	Yes	Yes	No	No	No	No	TS5 with extensions
Synchronet IRCd	No	No	No	No	No	No	No	No	No	No	No	TS5 with extensions
UnrealIRCd	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	No	DreamForge/TS5 with extensions
WeIRCd	Partial	No	Partial	No	No	No	Yes	Yes (module)	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, ie no chanops and channel mode forced to +nt. 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	Advanced Operator ACL	Operator "Levels"	vHost via I-line (or equivalent)	i18n Nicknames	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	via 3.1 privilege system	Yes	No	No
ConferenceRoom	# &	No	No	Yes	No	Yes	Yes	Yes	Partial	Partial
InspIRCd	#	Yes	Module	Module	Module	Yes	Module	Yes	Module	MySQL, SQLite & PostgreSQL: Authorization, Services Integration, Logging, Operaccess
IRCD	# & ! +	No	No	No	No	?	No	No	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
Nefarious IRCu	# &	Yes	No	No	No	Yes	No	Yes	No	No
ngIRCd	# & +	No	No	No	No	No	No	No	No	No
OfficeIRC Server	# %# & %&	No	Yes	Yes	Yes	Partial	Yes	Yes	Yes	Partial
PleXusIRCd	# &	Yes	Yes	Yes	No	No	?	Yes	?	No
pureIRCd	#	No	No	?	?	?	?	?	?	?
RockIRCd	#	No	Yes	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	Third party module [31]	No	No	iso8859-1/2/7/8-I/9/16, windows-1250/1251, Multibyte	MySQL & PostgreSQL: Third party modules [32]
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	No
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	?	? / ?	?	? / ?	? / ?	?	?	?
ircd-ratbox	Yes	No / No	No	No / No	No / No	No	No	No	Yes
ircu	Yes	? / ?	?	? / ?	? / ?	?	?	No	No
ithildin	Module	No / No	No	No / No	No / No	No	No	?	?
Nefarious IRCu	Yes	No / No	No	No / 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	?
PleXusIRCd	Yes	No / No	No	No / No	No / No	No	No	?	?
pureIRCd	?	? / ?	?	? / ?	? / ?	?	?	?	?
RockIRCd	No	Yes / 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	?
Synchronet IRCd	Yes	Yes / No	Yes	No / No	No / No	No / No	No	No	?
UnrealIRCd	No	Yes	Yes	Yes / No	Yes / Third party module [33]	No	No	Third party module [34]	Yes
WeIRCd	Partial	No / No	No	No / No	No / No	No	No	No	Yes

Notes

^ ^a ^b The official website for the QuakeNet IRC network
^ DALnet: Bahamut project page
^ Linux Help - Bahamut Setup Guide
^ Official bIRCd website
^ beware ircd
^ Jilles' IRC page: charybdis
^ Faerion - ircd
^ Browse Faeron Software Components Files on SourceForge.net
^ freenode: hyperion-ircd
^ Inspire IRCd - The Stable, High-Performance Modular IRCd
^ SourceForge.net: InspIRCd - The Modular C++ ircd: Files
^ The Ignition Project : ignitionServer
^ The Ignotion Project : Downloads
^ The Ignition Project | Get The Ignition Project at SourceForge.net
^ IRCD - the server
^ IRC history
^ Source code
^ Undernet Coder Committee
^ ServerWatch.com: Dalnet DreamForge Daemon
^ ircu2.10.12.12 source code (tar.gz)
^ Ithildin
^ Downloads - Ithildhin
^ Ithildin license file (1.1 branch in repository)
^ ngIRCd: Next Generation IRC Daemon
^ ngIRCd download page
^ rubbermallet.org: RockIRCd
^ RockIRCd 1.0.0-testing source (.zip)
^ BerliOS: ShadowIRCd
^ ^a ^b ^c http://www.quakenet.org/development/releases/snircd.12.10.1.3.4a.tar.gz
^ SolidIRCd SourceForge Project Page
^ ircd.js : The Synchronet IRCd Service
^ synIRCd SourceForge Project Page
^ TR-IRC Daemon and Services
^ Browse The Ultimate IRC daemon Files on SourceForge.net
^ About UnrealIRCd
^ unrealircd.doc
^ Download Unreal
^ Viagra IRCd (Unmaintained/Orphaned)
^ WeIRCd - the simple & easy IRCd (IRC Daemon)
^ Index of /weircd/releases/
^ epoll (Linux since 2.6) - I/O event notification facility. Has a much better performance than select() and poll() system calls.
^ kqueue (FreeBSD since 4.1) - asynchronous event dispatch mechanism.
^ "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.
^ Supported Operating Systems - Inspire IRCd (InspIRCd)
^ Modules - Inspire IRCd (InspIRCd)
^ The ability for network staff (not channel ops, but ircd opers) to be denoted in a channel with a special prefix
^ Protect "higher" opers from being killed and/or z, k, or g-lined by "lower" opers

External links

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

v • d • e

Internet Relay Chat (IRC)

General topics

Common terms	Admin · BNC · Bot · Channel · DoS attack · Channel Operator · Client · Flood · Hostmask · IRC · Netsplit · Network · Operator · Script · Server · Services · Takeover · vhost

Lists and comparisons	List of IRC commands · Comparison of IRC clients · Comparison of mobile IRC clients · Comparison of IRC daemons · Comparison of IRC services

Related protocols	IRC · IRCX · MSN Chat · P10 · CTCP · DCC · XDCC · Ident

See also	IRC subculture · Jarkko Oikarinen

Clients

Mac OS X	Colloquy · Fire · Homer(Mac OS) · Ircle · Linkinus · MacIrssi · Snak

Microsoft Windows	Bersirc · KoolChat · mIRC · Microsoft Comic Chat · Neebly · NexIRC · Orion · PIRCH · Shareaza · Visual IRC

MS-DOS	LeetIRC

Unix-like	ircII

Cross-platform	BitchX · Irssi · Konversation · naim · Smuxi · WeeChat · XChat

Cross-platform (Java)	DMDirc · jIRC

Multi-IM	Centericq · Empathy · Kopete · Miranda IM · Pidgin · Trillian

Multi-IM (Java)	Qnext · SIP Communicator

Embedded systems	WLIrc

Web-based	CGI:IRC · Mibbit

Web browser components	ChatZilla · Mozilla Application Suite · Opera

Library and plug-ins	ERC · rcirc

Bots

Eggdrop · Infobot

Bouncers, Gateways and Proxies

BitlBee

Daemons

IRCd · ircu · UnrealIRCd

Networks

AbleNET · DALnet · EFnet · freenode · GameSurge · IRC@2ch · IRCnet · OFTC · QuakeNet · Rizon · RusNet · SlashNET · Undernet

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