Comparison of VoIP software

Voice over IP (VoIP) software is used to conduct telephone-like voice conversations across the internet. This is cheap, and increasingly popular both in business and privately.

As a public medium, in theory calls made across the Internet can be listened into by users of the computers which relay them, without legal authority. So certain packages use encryption (either rigorously or to a less robust degree) to improve the privacy of the discussion.

A list of VoIP software can be found in the Voice over IP article.

This article is under development, information may be incomplete or missing

Packages

Program	Operating systems	Source and licencing	Security	Other capabilities	Protocols/based upon/compatible with	Key and target markets	Latest release
3cx_phone_system	Windows XP, 2000, 2003.	Closed / SIP		IP PBX	SIP	SMB	2.0
Abbeyphone	Windows XP/2000	Proprietary / SIP
AGEphone	Windows XP/2000, PocketPC, Windows Mobile	Proprietary / Closed	Password Encryption	Recording, Voice Mail, Multiple Services at Once, Outlook Support, Call Forwarding	SIP, SDP, RTP, STUN, UPnP		1.50, 29/09/2006
Asterisk PBX	Linux for PPC, OpenBSD, FreeBSD, Mac OS X Jaguar.	Dual Licensed: GPL / Commercial
Coccinella	FreeBSD, Linux, Mac OS X, Windows	GPL Free software	Supports TLS/SSL and SASL	File transfer, whiteboard	XMPP, Jabber, IAX		0.95.13
Cornfed SIP User Agent	Linux	Free for non-commercial use	Standard SIP authentication (MD5 Digest)	Command-Line Interface (CLI) and Gnome GUI clients	SIP/RTP	Embedded Systems and Linux users	1.0.1
Dingotel	Windows	Closed source	Some of the Dingotel traffic is encrypted.	Has a 2-way radio feature, so one can tunnel FRS through the internet.		Walkie Talkie
Ekiga	Linux	GPL Free software			SIP, H.323		2.0.2. June 5, 2006
Express Talk	Windows	Proprietary freeware		6 Lines, Multiple SIP Accounts, Conferencing, Transfers, Recording,	GSM, G.711 uLaw, G.711, aLaw, PCM		2.02
Eyeball Chat	Windows	Proprietary freeware		Free VoIP, Video and IM			2.2
GameComm	?
Gizmo	Linux, Mac, Windows XP/2000	Proprietary freeware	Gizmo to Gizmo calls use encryption.	Recording, voicemail	SIP, Jabber (text-chat only)		2.0.0.198. August 8, 2006
GE2006	Windows Only	Proprietary freeware	Cryptography & CP,	Voice, Video, Voice Mail, Missed Calls
Google Talk	Windows XP/2000	protocol code is open source (libjingle), the rest is proprietary	Does not use TLS/SSL, but 3rd party clients may	Voice, Chat, File transfer, voicemail, Mail via "GMail Integration"	XMPP, Jabber		1.0.0.98. september 28, 2006
iCall	Windows XP/2000	Proprietary freeware	SIP	Free PC to Phone calling in the US and Canada, Voicemail	SIP
IP Multimedia Subsystem	?
iVisit	Windows & Mac	Proprietary/closed		8-way videoconferencing, chat, file sharing, recording in QuickTime format	Proprietary P2P protocol		3.6.3 (verified on July 7th, 2006)
Jajah		Proprietary freeware update:cannot be downloaded any more	SIP	Video, chat, text messaging, voicemail	SIP, Skype, Gizmo and IAX/H.323
KCall	Linux	GPL / LGPL
KPhone	Linux	GPL	SRTP	Video, voice, IM, external Sessions	SIP
MindSpring (formerly Vling)	Windows XP, 2000,	open SIP, freeware		Instant messaging, Free PC to PC calls, PC to trad phones, file transfer, free voicemail	SIP, XMPP
Minisip	Windows XP, 2000, Linux, Pocket PC	LGPL, GPL	SRTP, TLS, MIKEY (DH, PSK, PKE), end to end encryption	Video, voice, IM Conferencing	SIP
NetUP UTM billing software supporting RADIUS	Linux, FreeBSD, Solaris, Windows	Commercial	Encrypted RADIUS authorization (PAP, CHAP, MS-CHAPv2, EAP-MD5, SIP Digest)	Java-based multiplatform administration interface	RADIUS, H.323, SIP	VoIP providers and ISP	5.2.1-001
OpenH323 and OPAL	?	Open source?/MPL			Used as the basis of several other VoIP applications including Ekiga and GnuGK
PeerMe	?	Proprietary freeware
PGPfone (superseded by Zfone)	?	Viewable source + Proprietary License (includes time bomb provision)	Strong standards based encryption
Program	Operating systems	Source and licencing	Security	Other capabilities	Protocols/based upon/compatible with	Key and target markets	Latest release
PJSIP SIP Stack	Linux, Win32 (NT/200/XP), WinCE/Windows Mobile, MacOS X, FreeBSD, RTEMS, Symbian, etc	GPL Free software		Media stack included	SIP	User agent development
PhoneGaim	Linux (Linspire), Windows XP/2000	GPL Free software			SIP
Phoner	Windows	proprietary freeware	SRTP	recording, voicemail	SIP, CAPI		1.88 September 10th, 2006;
PhonerLite	Windows	proprietary freeware	SRTP		SIP		1.15 September 10th, 2006;
ReSIProcate	?	Vovida Software License (open source)
SightSpeed	Mac / Windows	Proprietary freeware	SIP	Video, Voice, Voice Mail	SIP		4.6 May 26,2006
SIMPLE	?
SIP Communicator	Linux, Mac, Windows XP/2000 (all java supported)	GNU Lesser General Public License		Video, chat, text messaging	SIP/SIMPLE, Jabber, AIM/ICQ, MSN, Yahoo, IRC
SIP Express Router (SER)	?
sipX	?	Open source (different OSI approved licenses)
SJphone	MS Windows, Mac, Linux, Win Mobile 5.0	Proprietary		Conferencing, Video, Presence, Chat and more	Interoperable with al lstandards-based software and services. Support SIP/H.323, RTP, SDP, STUN, Jabber and more	ITSP (Internet Telephony Service Providers) and ISV	1.6
Program	Operating systems	Source and licencing	Security	Other capabilities	Protocols/based upon/compatible with	Key and target markets	Latest release
Skype	Windows XP/2000, Mac, Linux, Pocket PC	Proprietary/closed	Always encrypted. See Skype#Security for detailed discussion.	Video, Chat, file transfer, voicemail, Skype to phone, phone to Skype	Proprietary P2P protocol uses "SuperNodes" on TCP ports 80 and 443 to circumvent firewalls		Windows: 2.5.0.146 Sept 27, 2006 Linux: 1.3.0.53 Oct 04, 2006 Mac OS X: 1.5.0.80 Oct 03, 2006
*starShop	?	Open source			Based on Asterisk PBX	Calling Shops and Internet cafes.
Tapioca	Linux	GNU Lesser General Public License					0.3.9 (June 12, 2006)
TelTel	Windows	Proprietary	SIP over TLS, SRTP	voice, IM, TelTel-Out, TelTel-In	SIP, STUN, TLS, SRTP based on Resiprocate sip stack		0.9.2.18
TERAVoice Server	?
Tivi	?
Twinkle	Linux (especially KDE)	GPL Free software	SIP		SIP		0.8.1 (July 9, 2006)
Vbuzzer	?	Proprietary freeware				Designed to be used in conjunction with Vbuzzer
VoipDiscount	?	Proprietary freeware			Voice chat, text messaging, SMS, lowest rate in the market!!!	SIP
WengoPhone	Linux, Mac, Windows XP/2000	GPL Free software	SIP	Video, chat, text messaging, voicemail, wengo to phone	SIP,Yahoo!, MSN, Jabber, GoogleTalk		v2.0 RC3. July 1, 2006
Windows Live Messenger	Windows XP/2000	Proprietary freeware		Video, voice, chat, text messaging, PC 2 Phone	SIP, RTP, proprietary
Yahoo! Messenger	Windows, Mac, Linux	Proprietary		Video, chat, file transfer, voice (PC to PC, PC to phone, phone to PC)
X-Lite	Windows, Mac, Linux	Proprietary	SIP over TLS, SRTP	Video, voice, IM, Conferencing, Multiple login account	SIP, STUN, ICE, TLS, SRTP based on Resiprocate sip stack		v3.0
YATE	Windows, Linux	GPL / MPL Free software			VoIP server and client for H.323, IAX, RTP and SIP, audio conference - unlimited users, PBX, E1/T1, ISDN,VoIP analyzer, PostgreSQL and MySQL support, IVR	Major application is H.323-SIP signalling proxy.
Zfone (beta testing as at April 2006)	Windows, Linux, Mac	Viewable source + Proprietary License (includes time bomb provision)	Based on SRTP, which uses 256-bit AES together with a 3,000-bit key exchange system and voice based verification to prevent man in the middle attacks. Protocol published as an IETF draft: "ZRTP: Extensions to RTP for Diffie-Hellman Key Agreement for SRTP" [1]			Security conscious individuals and businesses

See also

• Voice over IP
• Secure communication
• softphone