Comparison of VoIP software

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This is a comparison of Voice over IP (VoIP) software used to conduct telephone-like voice conversations across Internet Protocol (IP) based networks. For residential markets, VoIP phone service is often cheaper than traditional public switched telephone network (PSTN) service and can remove geographic restrictions to telephone numbers, e.g. have a PSTN phone number in a New York area code ring in Tokyo.

For businesses, VoIP obviates separate voice and data pipelines, channelling both types of traffic through the IP network while giving the telephony user a range of advanced capabilities.

Softphones are client devices for making and receiving voice and video calls over the IP network with the standard functionality of most "original" telephones and usually allow integration with IP phones and USB phones instead of utilizing a computer's microphone and speakers (or headset). Most softphone clients run on the open Session Initiation Protocol (SIP) supporting various codecs. Skype runs on a closed proprietary network, though the network (but not the official Skype client software) also supports SIP clients.[1] Online "Chat" programs now also incorporate voice and video communications.

Other VoIP software applications include conferencing servers, intercom systems, virtual FXOs and adapted telephony software which concurrently support VoIP and PSTN like IVR systems, dial in dictation, on hold and call recording servers.

Some entries below are Web-based VoIP; most are standalone applications.

General softphone clients[edit]

Program Operating systems License Costs Protocols Codecs Encryption Max conference peers Other capabilities Latest release
AOL Instant Messenger Mac OS, Windows Proprietary Free SIP (Windows ver. only), RTP Unknown Unknown Unknown Video, file transfer, PC to phone, phone to PC 8.0.7.1 (February 4, 2014; 2 months ago (2014-02-04)) [±]
Avaya Application Server 5300 Soft Client Windows Proprietary ? SIP, RTP, Unknown TLS, SRTP Unknown 2.0 (2010)
Blink Linux, Mac OS, Windows GPL Free ICE, SIP, MSRP, RFB (VNC) Opus, speex, G.722, GSM, iLBC, PCMU, PCMA TLS, SRTP Unlimited IM, File Transfer, Desktop Sharing(only Mac OS), Multi-party conference, Wideband 1.8.1 (April 20, 2012)
Bria by CounterPath Corporation Windows, Mac OS, Linux (Voice calling only) Proprietary No SIP / SIMPLE, XMPP, STUN, ICE G.722 wideband, G.711a, G.711u, iLBC, G.729a, G.729ab, H.263, H.264/MPEG-4 AVC, iLBC, Speex, SILK, GSM, VP8, H.264, Opus TLS, SRTP 6 party audio; 3 party video Voice and HD (1280 x 720p) Video calling; Multiple Account Integration; Address Book Support (Mac and Windows); Company Chat Rooms; USB Support; Troubleshooting Assistant; Workgroups; Call Recording and Conferencing 3.4.3 (October 2012)
Cisco IP Communicator Windows, Android Proprietary ? SCCP (Skinny), SIP, TFTP G.722 wideband, G.711a, G.711u, iLBC, G.729a, G.729ab SRTP Unknown Call Recording, Silent Monitoring, Multiple lines and directory numbers, Configurable speed dial, Calling name and number display, Call Waiting, Call Forward, Call Transfer, Three-Way Calling (conference), Call Park, Call Pickup, Redial, Hold, Barge, Callback, Extension Mobility, Message waiting indicator, iDivert, Meet Me conferencing, Group Pickup, Do Not Disturb 7.0.6 (Jan 2011)
Ekiga Linux, Windows, OpenSolaris GPL Free SIP, H.323, STUN, Zeroconf, XMPP, RTP H.263, H.264/MPEG-4 AVC, Theora, iLBC, Speex, SILK, GSM, ... No Unknown Video, IM, LDAP, Call Forwarding, Call Transfer, Auto-answering, PC to phone, phone to PC, Multiple accounts, USP support, Message waiting indicator, SIMPLE-based presence etc. 4.0.1 (February 21, 2013; 13 months ago (2013-02-21)) [±]
Empathy Linux GPL Free SIP, XMPP (Jingle), ICE (STUN/TURN), Zeroconf Unknown No Unknown IM, multi-user A/V,[2] collaborative applications 3.12 (March 26, 2014; 21 days ago (2014-03-26)) [±][3]


Eyeball Chat Windows Proprietary Free SIP, STUN, ICE, XMPP Unknown Yes 5[4] IM, Conferencing, Voice, Video and SIMPLE based presence Windows 3.2 (2009)
eyeBeam by CounterPath Corporation Windows Proprietary ? SIP / SIMPLE Unknown TLS, SRTP 6 party audio; 3 party video Voice and Video calling; IM; Import Microsoft Outlook Contacts; USB Support; Call Recording and Conferencing 1.5.20.1 (March 2010)
Gizmo5 Linux, Mac OS X, Windows, Windows Mobile Phone, BlackBerry, Nokia, PDA Java Proprietary Free SIP, XMPP Unknown SRTP Unknown Record Calls, Forward Calls, MSN IM, Windows Live Talk, Google Talk, Talk with Yahoo, Messenger, XMPP Windows: 4.0.5.395 (23 Sep 2009), Mac OS: 4.0.0.269 (23 Sep 2009)
Google+ Hangouts Linux, Windows, Mac OS X, Android, iOS Proprietary (using libjingle) Free XMPP Unknown SRTP 10 Video, chat, screen sharing, with additional tools available as "Hangout Apps". Google Chrome Web Store extension
2013.626.1614.1 (July 9, 2013; 9 months ago (2013-07-09)) [±] [5]
IBM Sametime Linux, Mac OS X, Windows, mobile Proprietary ? SIP, SIMPLE, T.120 H.323 TLS Unknown IM, File transfer, Voice, Presence, Server stored contact list, HTTP tunneling, plugins, embedable in Lotus Notes[6] 8.5.2 (08. May 2011)
iCall Linux, Mac OS X, Windows, iOS, Android Proprietary Free SIP AIM ICQ XMPP Speex, CELT, WebM TLS ZRTP Unlimited Video, file transfer, PC to phone, phone to PC, IM (MSN, AIM, ICQ, Yahoo!, XMPP, Google Talk), Voicemail 7.1.522
Messages Mac OS X Proprietary ? SIP AIM ICQ XMPP H263, H264 Unknown Unknown Integrated, PBX independent 7.0 July 25, 2012; 20 months ago (2012-07-25)
Jitsi Linux, Mac OS, Windows (all java supported) LGPL Free SIP/SIMPLE, XMPP/Jingle STUN ICE, TURN SILK, G.722, Speex, Opus, G.711 (PCMU/PCMA), iLBC, GSM, G.729, H.264, H.263 ZRTP, SRTP, TLS Unknown Text messaging, audio/video telephony, IPv6 (often broken,[7] P2P not supported[8]), call recording, 64-bit 2.4 (build.4997) (January 7, 2014; 3 months ago (2014-01-07)) [±]
KPhone Linux (KDE) GPL Free SIP, STUN, NAPTR/SRV Unknown SRTP Unknown Video, voice, IM, external Sessions, IPv6 support for UDP 1.2 (November 2008)
Linphone Linux, Windows, Mac OS, Android, iPhone, BlackBerry GPL Free SIP Speex, G711, GSM, G.722; VP8 (WebM), H263, MPEG4, Theora and H264 (plugin) TLS, SRTP, ZRTP Unknown Video, IM, STUN, IPv6 (disables IPv4 support when enabled, P2P supported only by version 3.5.1-2) 3.7.0 (20 Feb 2014)
MicroSIP Windows GPL Free SIP, STUN, ICE, SIMPLE Speex, iLBC, GSM, G.711, G.722, G.729, SILK, Linear PCM TLS, SRTP Unknown Video, voice, IM and Presence 3.3.36 (Dec 17, 2013)
Mirial Softphone (Mirial s.u.r.l.) Windows 2000/XP/2003/Vista/7 (including 64bit versions), Mac OS X (x86) Proprietary ? SIP, RTSP H.323 DTLS-SRTP Unknown H.264 Full-HD 1080p video rx/tx, Two independent lines supporting Call Control and 3-Party videoconference in Continuous Presence, G.722.1/C wideband audio, Call recording/export, DV/HDMI/Component capture, Presentation (H.239, RFC-4796), Encryption, Far End Camera Control, GPU accel (D3D and OpenGL) 7.0.24 (May 26, 2010)
Mumble Linux, Mac OS X, iOS, Windows, Android BSD Free Unknown CELT, Speex, Opus TLS and OCB-AES128 No max (limited only by server bandwidth and memory) Chat with (limited) embedded HTML, Automatic Gain Control, Access Control Lists for user management, Customizable In-Game Overlay, Directional Audio, Plugin Support, Nested Channels, Echo cancellation, Logitech G15 support, Push-To-Talk 1.2.4 (June 2013)
Nymgo Windows, Android, iOS Proprietary Free SIP, RTP and RTCP Unknown Yes No Address Book integration, Call recording/export, Mute, On Hold, Caller ID definition 4.2.9 (March 2013)
oovoo Mac OS X, iOS, Windows, Android Proprietary Free SIP, RTP and RTCP Unknown Yes No Address Book integration, Call recording/export, Mute, On Hold, Caller ID definition 4.2.9 (March 2013)
Nextiva Mac OS X, iOS, Windows, Android, Proprietary Free SIP G.711u, Unknown 4 Instant Messaging, Chat Rooms, Voice Calling, Enterprise Directory, Presence, Video Collaboration, Call Controls, Call Pulling, Call Pulling 10.0.4.-3257 (Jan 2014)
Phoner Windows Proprietary Free SIP, TAPI, CAPI Unknown TLS, SRTP, ZRTP 8 Conferencing, call redirection, call recording 2.87 (5 March 2014; 42 days ago (2014-03-05)) [±][9]
PhonerLite Windows Proprietary Free SIP Unknown TLS, SRTP, ZRTP 8 Conferencing, call redirection, call recording 2.14 (5 March 2014; 42 days ago (2014-03-05)) [±][10]
QuteCom Linux, Mac OS X, Windows XP/2000 GPL Free SIP Unknown SRTP, but key exchange via Everbee key Exchange which is not a Standard Unknown Video, IM (MSN, AIM, ICQ, Yahoo!, XMPP, Google Talk), voicemail, wengo to phone, conferencing. 2.2.1 (June 22, 2011; 2 years ago (2011-06-22)[11]) [±]
Revation Communicator Windows 2000/XP/Vista/7 Proprietary ? Proprietary G.722, G.711, VP8, Opus TLS and SRTP No max (limited by server mixing services) Secure Multi-Party Chat/Instant Messaging, Presence, VoIP, Video, File Transfer, Desktop Sharing 6.3 (July 2013)
SFLphone Linux GPL3 Free SIP, RTP, IAX2, STUN per account, SRV Audio: Opus, Speex, G.722, G.711, GSM, VP8, G.729, iLBC. Video: H.264, H.263, VP8, MPEG-4 Voice encryption (SRTP), Signaling encryption (TLS), Multiple realms authentication mechanism Unknown Gnome/KDE client, address book, multiple accounts, unlimited number of calls, call transfer, call hold/unhold, call recording, Multi-way conferencing 1.3.0 (January 2014)
SightSpeed Mac OS X, Windows Proprietary Free SIP, RTP, Proprietary P2P protocol Unknown Unknown Unknown Video, voicemail, phone in, phone out, multiparty calling, conference recording, text messaging, NAT traversal, video mail 6.0 (2007)
Skype Linux, Mac OS X, Windows 2000/XP/Vista/7/Mobile (no longer supported), BREW, Windows Phone , Android, iPhone, PSP Proprietary Free Proprietary P2P protocol (a) SILK Yes, but see this article for more details in this regard.(no longer secure) 25 starting with version 3.6.0.216. 10 with 2.x Conferencing, video, file transfer, voicemail, Skype to phone, phone to Skype, additional P2P extensions (games, whiteboard, etc...); depending on platform.
Spikko Windows 2000/XP/Vista/7/Mobile, iPhone, Proprietary Free SIP Unknown Yes 8 Conferencing, voicemail, PC to phone, phone to PC, Free international phone numbers, address book integration; Dec 2010
TeamViewer Linux, Windows, Mac OS X, iOS, Android[25] Proprietary Free (personal use only) Unknown Unknown AES256 Unknown Unknown
TeamSpeak Linux, Windows, Mac OS X, FreeBSD, Android, iOS Proprietary Free Unknown CELT, Speex, Opus Yes 32 unlicensed / 512 with Non-Profit License / 2000 Simultaneous Server Conferencing with Tabs, 3D Sound Effects, Scalable Permissions System, Firewall Friendly File Transfers, In-Game Overlay for DirectX & OpenGL Games, Global Public Server List, Plugin System 3.0.11
Telephone Mac OS X 10.5 BSD Free SIP, STUN, ICE Unknown No Unknown Address Book integration 1.0.4 (March 6, 2012; 2 years ago (2012-03-06))
Toktumi Unlimited / Line2 Pro Windows XP/Vista/7, Mac OS X, iOS, Android Proprietary Free Proprietary with SIP core Unknown Unknown 20 Conferencing, voicemail, caller ID, call-waiting, address book integration; auto-attendant, call-forwarding Windows: August 2010 / OS X: October 2010
Tru App Windows 2000/XP/Vista/7, Mac OS X, Linux
iOS, Android, Symbian, BlackBerry OS,
Proprietary Free SIP, XMPP Unknown Unknown Unknown Chat, file transfer, voicemail, inbound numbers, integration with GTalk, Microsoft Live, Skype
Twinkle Linux GPL Free SIP Unknown SRTP, ZRTP Unknown Conferencing, chat, file transfer, Firefox integration, call redirection, voicemail, support of VoIP-to-Phone services 1.4.2 (February 25, 2009; 5 years ago (2009-02-25)) [±]
Vbuzzer Windows 2000/XP/Vista Proprietary Free SIP Unknown TLS Unknown IM (MSN), voicemail, personalized voice greeting. 2.8.002
Ventrilo Mac OS X, Windows Proprietary Free Unknown Unknown No 8 Conferencing, chat, text-to-speech 3.0.8
Voice Operator Panel Windows 2000/XP/Vista Proprietary ? SIP, RTP Unknown Unknown Unknown Call forwarding, Call transfer, Call recording, Presence, Outlook integration, Windows Messenger/MSN/Live integration, CRM, Built-in web browser & e-mailer, LDAP, APS. 1.3.2
X-Lite Mac OS, Windows, (Linux) Proprietary Free SIP, STUN, ICE Unknown No Unknown IM, single login account, for Windows and Mac also Conferencing, Video and SIMPLE based presence Windows and Mac OS: 5 (2012). Linux: Discontinued. Cannot transfer calls [26]
Yahoo! Messenger Mac OS (8, 9, X), Windows, (Linux/FreeBSD version not VoIP capable) Proprietary Free SIP (using TLS) and RTP (media) Unknown Unknown Unknown Video, file transfer, PC to phone, phone to PC Windows: 11.5.0.228 / May 31, 2012; 22 months ago (2012-05-31)
Mac: 3.0.1 / July 20, 2011; 2 years ago (2011-07-20)
Linux: 1.0.6 / September 2003; 10 years ago (2003-09)
SunOS 5.7: 0.99.17-1 / September 2003; 10 years ago (2003-09)
Solaris 8: 1.0.4 / September 2003; 10 years ago (2003-09)
FreeBSD 4/5: 1.0.4 / September 2003; 10 years ago (2003-09) iOS: 2.2.6/ July 12, 2012; 20 months ago (2012-07-12)
Yate Client Linux, Mac OS, Windows GPL Free SIP, IAX, XMPP, H.323 G.711a, G.711u, GSM 06.10, iLBC, Speex, G.723, G.726, G.728, G.729 Unknown Unknown 4.3 2013-01
Zfone Linux, Mac OS X, Windows Viewable source (includes time bomb provision) SIP, RTP Unknown SRTP, ZRTP Unknown Beta 2008-09-04 (Linux 0.9.224), (Mac OS 0.9.246), (Windows 0.9.206)

(a) SIP users can connect to the Skype network using alternate software/hardware, but the Skype software does not support it directly[1]

Mobile phones[edit]

For mobile VoIP clients:

Program Operating systems License Open Source Protocols Codecs Encryption Other capabilities Latest release
Acrobits Groundwire Android v2.2+, iOS v4.3+ Proprietary No SIP SIMPLE G.711, G.722, iLBC, GSM, G.729 TLS, SRTP, ZRTP Groundwire voip over Wi-Fi or 3G, supports audio codecs. Multi line, call conferencing, transfer and attended transfer, voicemail.

iOS only - Push Notifications, video, number rewriting, address book matching, sms for betamax providers and pennytel

Groundwire (iOS) 2.4.5, Groundwire (Android) 3.21
Acrobits Softphone Android v2.2+, iOS v4.3+ Proprietary No SIP G.711, G.722, iLBC, GSM, G.729 TLS, SRTP, ZRTP VOIP over Wi-Fi or 3G iOS only - Push Notifications, video, number rewriting, address book matching, sms for betamax providers and pennytel Acrobits Softphone (iOS) 5.2, Acrobits Softphone (Android) 3.20
Bria by CounterPath Corporation iOS 4.3+, Android v2.2+ Proprietary No SIP SIMPLE G.711, G.722, iLBC, GSM, SILK, G.729, H.264 TLS, SRTP VoIP over Wi-Fi or 3G/4G; Audio codecs ; Multiple languages; Option to purchase Video Calls add-on with H.264 codec and Messaging and Presence add-on which uses XMPP and SIP protocols. 2.1.3 (iOS), 2.0.3 (Android)
CSipSimple Android v1.6+ GPL Yes SIP G.711, Speex, GSM, iLBC, G.722, AMR, iSAC, SILK, G.726, G.722.1, Opus, Codec2, G.726 SRTP, ZRTP, TLS VoIP over Wi-Fi or mobile data; Conference; Android integration with filtering/rewriting rules 1.02.00 (11 November 2013)
Gizmo5 Mobile Windows Mobile (non-native, only through SJPhone), Motorola, Nokia, BlackBerry, Java PDA's, Sony Ericsson, Samsung Freeware No SIP, AIM, iChat, XMPP, MSN, Yahoo Unknown Yes Online Phone over EDGE, UMTS, 3G, Call Land and Cell phone, Voicemail, AOL, iChat, XMPP, Yahoo! Messenger, Windows Live. On April 3, 2011 Google shut down Gizmo5 and recommended users to use Google Talk as an alternative. 1.15 (as of May '08)
JusTex by Juphoon iOS v5.1+ Proprietary No SIP PUMA, PCMU, G.722, iLBC, iSAC, Opus, H.264, VP8, H.263 TLS, TCP, UDP, SRTP JusTex Softphone over Wi-Fi or 3G, HD voice and video call, Multiparty call, conference. JusTex (iOS) 1.0.5 updated on 26th Nov. 2013
iCall Mobile iOS v4.3+ Freeware / Proprietary No SIP AIM ICQ XMPP Speex, CELT, WebM TLS, ZRTP VoIP over Wi-Fi or 3G, SMS, Voicemail, AOL, Facebook, XMPP, Yahoo! Messenger, Windows Live 2.0.1 (as of Apr '12)
Jajah Mobile Web Symbian OS, Windows Mobile (version unknown) web based service, Call back,no download[27] No Unknown Unknown
Line2 iOS, Android Freeware / Proprietary No Proprietary with SIP core Unknown Unknown Tri-mode calling (cellular, 3G/4G data, Wi-Fi), SMS over IP, visual voicemail, 20-person conference calls, auto-attendant, call-forwarding 1.0.4 Android, 3.2.1 iOS
Sipdroid Android GPL Yes SIP Unknown Unknown Uses Wi-Fi, 3G or EDGE 2.7
Tango by TangoME Inc., iOS, Android, Microsoft Windows, OS X, Windows Phone Freeware / Proprietary Unknown Unknown Unknown Unknown Wi-Fi VoIP out & in, SMS over IP, call-through & call-back, Voice over IP, Instant messaging, Videoconferencing Unknown
Truphone Nokia-Symbian, iOS, Android, BlackBerry Freeware / Proprietary No SIP Unknown Unknown Wi-Fi VoIP out & in, SMS over IP, call-through & call-back, connection management, provisioning Symbian 4.0, iOS 1.11.1
Vopium Symbian, Java ME, Android, BlackBerry RIM, iOS, Windows Mobile 2003 SE and higher Freeware / Proprietary No SIP, MSN, Skype, Yahoo, AOL, ICQ, Google Talk, Facebook & Twitter GSM Unknown Wi-Fi VoIP, GSM call-trough, SMS over IP, least cost routing, Synchronisation/back-up of mobile contacts and calendar 2.0
Windows Mobile 6 Windows Mobile 6 Professional/Standard Proprietary No SIP to publicly and non-publicly routable servers Unknown Unknown Wi-Fi Mobile VoIP 6.1
X-PRO for Pocket PC Windows Mobile 2003 (earlier versions support Windows PocketPC 2002) Proprietary, discontinued in April 2007[28] No SIP Unknown Unknown Supported devices: AudioVox Maestro, Compaq/HP iPAQ: 365x, 37xx, 385x, 395x, hx4700, Dell Axim X51, X51v, Toshiba e550, e570. iPAQ 545x and Toshiba e7xx are not supported.[29] 2.2
Yuilop Android, iOS, Windows Phone, BlackBerry OS Freeware No XMPP, RTP iLBC TLS VoIP over 3G/4G/LTE and Wifi, SMS, Group chat, Photo sharing, Location sharing, virtual phone numbers iOS 2.0.3 (February 3, 2014; 2 months ago (2014-02-03)) [±]

Android 2.0.2 (February 12, 2014; 2 months ago (2014-02-12)) [±]
Windows Phone 7.x 1.0.1.7 (September 12, 2013; 6 months ago (2013-09-12)) [±]
Windows Phone 8.x 1.0.0.4 (September 18, 2013; 6 months ago (2013-09-18)) [±]
BlackBerry OS 1.0.1 (May 31, 2013; 10 months ago (2013-05-31)) [±]
Kindle Fire 2.0 (December 19, 2013; 3 months ago (2013-12-19)[30]) [±]

Frameworks and libraries[edit]

Program Operating systems License Protocols/based upon/compatible with Encryption Other capabilities Key and target markets Latest release
Tapioca Linux GPL Telepathy (software) Unknown 0.3.9 (June 12, 2006)
Telepathy/Farstream Linux, Mac OS X, Windows LGPL SIP, XMPP (Jingle), ICE (STUN/TURN), UPnP No Multi-user A/V conferencing, IM, collaborative applications Mobile devices (Maemo), Linux Desktop spec 0.17.8 (24-Jul-2008)
OPAL Windows, Linux (including embedded variants), Mac OS X MPL SIP, H.323, IAX2, CAPI, VXML Unknown Multi-user A/V conferencing, IM, IVR Softphones, Softswitches, Telephony application servers 3.10.3 (14-Oct-2011)
GNU oSIP Linux, Windows, Mac OS, Android, iPhone, BlackBerry LGPL SIP, SDP Unknown Multi-user A/V conferencing, IM, IVR Softphones, Embedded and Mobile devices, Telephony application servers 4.1.0 December 18, 2013 (2013-12-18)

Server software[edit]

Program Operating systems License Protocols/based upon/compatible with Encryption Other capabilities Key and target markets Latest release
3CX Phone System Microsoft Windows Proprietary SIP TLS, SRTP Voice and Video IP telephony, Voice and Video conferencing, voice mail and instant messaging <= 50,000 users 12 (Sep 2013)
AS5300 Linux, Windows Server 2003 Proprietary SIP, UNIStim, MLPP SSL, TLS,

SRTP, SDESC

Voice and Video IP telephony, Voice and Video conferencing, voice mail and instant messaging 1,000 - 25,000 users 1.0 (Jan 2008)
AskoziaPBX no additional OS required (Linux based) GPL / Open core SIP, H.323, IAX, SCCP No ISDN, analog, Voicemail, Conferencing, MOH, ACD, IVR, Call forwarding, Call recording SMEs up to 50 users 2.2.2 (Dec 2012)
Asterisk PBX Linux/BSD, Mac OS X, Solaris GPL / Proprietary [31] SIP, H.323, IAX TLS, SRTP VoIP Gateway, voicemail, basic accounting (can be expanded by interface with ODBC-compliant database), billing, conferencing, hot-desking, IVR trees with conditional logic, call queuing, automated call distribution Enthusiasts, developers, enterprise users (capacity dependent on server design, scalable across multiple servers) 11.8.1 (10 March 2014; 37 days ago (2014-03-10)) [±]

3.0.1 (20 March 2013; 12 months ago (2013-03-20)) [±]


CallMax Softswitch Linux Proprietary SIP, H.323 SSL, TLS, HTTPS Integrated billing, Residential/Hosted IP PBX, Multilevel IVR menu, Calling card platform, Callshop module, DID-numbers, SIP Trunking, Authorization by SIP, PIN, ANI, IP address and login/password SIP Service Providers, VoIP service providers, IP PBX Users, Other Class 5 softswitch users 2.12 (January 2012)
Cisco Unified Communications Manager Linux Proprietary SIP, SCCP, MGCP, H.323 SSL, TLS, SRTP SIP Registrar/Proxy, Authentication Enterprise users 9.0
ClearSea (Mirial s.u.r.l.) Windows 2000/XP/2003/Vista/7 (including 64bit versions), Mac OS X (x86), iOS (iPhone 3S+, iPad 2), Android Proprietary SIP, H.323 No H.239 presentation, H.224, H.281 (FECC), Acts as a Session Border Controller, H.323/SIP endpoint autodiscovery on local LAN, Support user authentication with external databases / LDAP,Centralized Contacts Directory, User Groups management, Video IVR for dialing endpoint extensions, Ajax-powered web-based administration console, ClearSea desktop client one-step installation via HTTP browser, Automatic provisioning, configuration and secure authentication of ClearSea client based on user credentials Desktop video conferencing users, Enterprises, Educational and Healthcare organizations 1.0.3 (April 30, 2010)
CommuniGate Pro Linux/BSD, Mac OS X, Windows, Solaris, HPUX, AIX Proprietary SIP, XIMSS Protocol, XMPP SSL, TLS SIP Registrar/Proxy, Authentication, Diameter, RADIUS, ENUM, and many others... Mobile Operators, ISP's, and SaaS providers 6.0.1 (December 2012)
Elastix Linux GPL SIP, IAX, H323, XMPP No Unified communication server that also supports chat, mail and fax. Capacity dependent on server design, scalable across multiple servers 2.4.0 (February 6, 2013)
FreeSWITCH Linux/BSD, Mac OS X, Solaris, Windows Mozilla Public License SIP, NAT-PMP, STUN, SIMPLE, XMPP, Google Talk (Jingle), IAX, H.323, MRCP, RSS, Skype TLS, SRTP, ZRTP Recording, Voicemail, Conferencing, RADIUS, ENUM, IM Proxy, Streaming, Media gateway, Soft-PBX, IVR (modular) Large soft-switch users, home PBX users, softphone users 1.2.14 (October 14, 2013; 5 months ago (2013-10-14)) [±]
GNU Gatekeeper Linux/FreeBSD, Mac OS X, Windows XP/2000/Vista/Windows 7 GPL H.323 H.235 H.460.18 firewall traversal, Routing, Accounting video conferencing, VoIP carriers large and small 2.3.2, May 25, 2010
MediaCore Softswitch Linux Proprietary H.323, SIP SSL, TLS, HTTPS Dynamic routing mechanism, integrated billing, SIP-H.323 protocol converter, Transcoding - codec converter module, Guardian - revenue assurance module, SBC functionality, full and media proxy Transit VoIP services providers, VoIP wholesale carriers 2.24 (December 2011)
Murmur Linux/BSD, Mac OS X, Windows BSD / GPL CELT, Speex, Opus TLS Chat with (limited) embedded HTML, ACLs for user management, Customizable In-Game Overlay, Directional Audio, Plugin Support, Nested Channels Individuals to Small and medium enterprise (25-5000 users) 1.2.4 (June 2013)
Mysipswitch Linux BSD SIP, Ajax SSL SIP proxy server which allows the use of multiple SIP accounts with a single SIP login Individuals August 2007
Objectworld UC Server Windows XP/2003/2008 Proprietary SIP No IP PBX, personal assistants, IVR, automated phone provisioning, fax server, unified messaging, Outlook, Exchange and Lotus Domino/Notes integration, conferencing, outbound dialing Small and medium enterprise (25-2000 users) 4.4.2 (May 2009)
Kamailio/OpenSIPS (formerly known as OpenSER) Linux/BSD, Solaris GPL SIP, XMPP No SIP Registrar/Proxy, Authentication, Diameter, RADIUS, ENUM, least-cost-routing and many others. SIP Service Providers 4.0.1 (25 April 2013; 11 months ago (2013-04-25)) [±]
snom ONE (formerly pbxnsip) Linux/BSD, Mac OS X, Windows Proprietary SIP SRTP IP PBX, presence indication, IVR, automated phone provisioning, fax server, unified messaging, Outlook, Exchange integration, conferencing, outbound dialing Small and medium enterprise (25-256 users) 3.3.1.3177 (April 2009)
Revation LinkLive Windows server / Linux Proprietary Proprietary TLS, SRTP Secure Unified Communications, Presence, Instant Messaging/Chat, VoIP, Video, Desktop Sharing, File Sharing, IVR, PBX, Voicemail, ACD, Email Server Unified Communications Service Providers 6.3 (July 2013)
SIP Express Router (SER) Linux/BSD, Solaris GPL SIP No SIP Registrar/Proxy, Authentication, Diameter, RADIUS, ENUM, and many others... SIP Service Providers 2.0.0 Ottendorf
sipX ECS IP PBX Linux AGPL Native SIP Call Control TLS Full redundancy (HA), plug & play management including phones and gateways, fully featured Enterprises between 200 and 10,000 users, multi-site 4.4, April 2012
Unison Linux Proprietary SIP, XMPP, IMAP, SMTP, CalDAV SSL, TLS Unified messaging, IP PBX, IVR, instant messaging, calendar server, LDAP server, E-mail server Small and medium enterprise (25-256 users) 3.0, February 2010
vzRoom Windows Proprietary SIP SSL, TLS, AES Instant Messaging/Chat, VoIP, Video, Desktop Sharing, Video Sharing, whiteboard, File Sharing, scheduler, recording Individual to small and medium enterprise (2-1,000 users) 0.8.8.735, November 2010
Yate Linux, Mac OS, Windows GPL SIP, IAX, H.323, XMPP TLS voice, data, messages, ussd is being used for large networks with milion users 5.0, October 2013

See also[edit]

References[edit]

  1. ^ a b "Skype Connect". Skype.com. Retrieved 2011-07-27.
  2. ^ "Telepathy Q&A from the Boston GNOME Summit". Retrieved 4 February 2014. 
  3. ^ Clasen, Matthias (2014-03-26). "GNOME 3.12 Released". GNOME mailing list. Retrieved 2014-03-26. 
  4. ^ Eyeball Chat 3.2 Features. EyeballlChat.com.
  5. ^ "Chrome Web Store Hangouts". Retrieved July 11, 2013. 
  6. ^ "Telephony with Lotus Sametime software". IBM.com. Retrieved 2010-02-16
  7. ^ Interview with Emil Ivov, Deploy360 blog
  8. ^ "[#JITSI-1166] P2P IPv6 calls still do not work with explicit IPv6 addresses, no matter if brackets are used - Java.net JIRA". Java.net. Retrieved 2014-02-13. 
  9. ^ Release history on Phoner download page
  10. ^ Changelog on PhonerLite download page
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