# List of SIP software

This list of SIP software documents notable software applications which use Session Initiation Protocol (SIP) as a voice over IP (VoIP) protocol.

## Servers
### Free and open-source license

A SIP server, also known as a SIP proxy, manages all SIP calls within a network and takes responsibility for receiving requests from user agents for the purpose of placing and terminating calls.
* Asterisk
* ejabberd
* FreeSWITCH
* GNU SIP Witch
* Kamailio, formerly OpenSER
* Mobicents Platform (JSLEE[2] 1.0 compliant and SIP Servlets 1.1 compliant application server)
* OpenSIPS, fork of OpenSER
* SailFin
* SIP Express Router (SER)
* Enterprise Communications System sipXecs
* Yate

### Proprietary license

* 3Com VCX IP telephony module: back-to-back user agent SIP PBX
* 3CX Phone System, for Windows, Debian 8 GNU/Linux
* Aastra 5000, 800, MX-ONE
* Alcatel-Lucent 5060 IP Call server
* Aricent SIP UA stack, B2BUA, proxy, VoLTE/RCS Client
* AskoziaPBX
* Avaya Application Server 5300 (AS5300), JITC certified ASSIP VoIP
* Bicom Systems IP PBX for telecoms
* Brekeke PBX, SIP PBX for service providers and enterprises
* Cisco SIP Proxy Server, Cisco unified border element (CUBE), Cisco Unified Communication Manager (CUCM)
* CommuniGate Pro, virtualized PBX for IP Centrex hosting, voicemail services, self-care, ...
* Comverse Technology softswitch, media applications, SIP registrars
* Creacode SIP Application Server Real-time SIP call controller and IVR product for carrier-class VoIP networks
* Dialogic Corporation Powermedia Media Servers, audio and video SIP IVR, media and conferencing servers for Enterprise and Carriers.
* Dialexia VoIP Softswitches, IP PBX for medium and enterprise organizations, billing servers.
* IBM WebSphere Application Server - Converged HTTP and SIP container JEE Application Server
* Interactive Intelligence Windows-based IP PBX for small, medium and enterprise organizations
* Kerio Operator, IP PBX for small and medium enterprises
* Microsoft Lync Server 2010 & 2013
* Mitel Communications Director
* NEC SV7000 back-to-back user agent SIP PBX
* NEC UNIVERGE 3C Unified Communications and Collaboration software
* Nokia Siemens Networks hiQ8000
* Nortel SCS500
* Nortel SIP Multimedia Communication Server 5200
* Objectworld UC Server
* Oracle Communications Converged Application Server (OCCAS)
* Oracle WebLogic SIP Server
* Spirent SIP Server Platform
* ShoreTel IP phone systems with unified communications and contact center built in
* Snom One free/blue/yellow (Snom acquired and renamed pbxnsip) (SIP)
* Speedflow Communications VoIP class 4/5 softswitches with integrated billing, transcoding, SIP-H.323 converter.
* Sterlite Technologies Neox IPPBX, IMS - ISC, Dial Center - OmniChannel Call Center, IVR products
* Sun Microsystems Sun GlassFish Communication Server
* Tadiran Telecom Coral Ipx family and Aeonix softswitch
* Tandberg Video Communication Server - SIP application server, media server and H.323 gateway
* Unify OpenScape Voice, OpenScape 8000 SIP softswitch, mediaserver, ... (SIP)
* Voice Elements Inventive Labs' .NET Voice Development software and SIP stack platform.
* Zultys MX250/MX30 IP PBXs for SMB and enterprise

## Clients
### Free and open-source license

* Ekiga (formerly known as GnomeMeeting). SoftPhone, Video Conferencing and Instant Messenger. No longer maintained, but still available.
* Jami, with GTK/Qt GUI, also supports IAX2 protocol, for Linux, OS X, Windows GPL
* Jitsi, a Java VoIP and Instant Messaging client with ZRTP encryption, for FreeBSD, Linux, OS X, Windows; LGPL
* Linphone, with a core/UI separation, the GUI is using Qt libraries, for Linux, OS X, Windows, and mobile phones (Android, iPhone, Windows Phone, BlackBerry)
* MicroSIP, lightweight softphone, using PJSIP stack, for Windows
* Telephone, OS X softphone written in Cocoa/Swift
* Twinkle, using Qt libraries, GPL, for Linux
* Yate client, using Qt libraries, GPL

### Proprietary license

* Blink, for Mac
* Librestream's 2500 Camera, 5000HD camera, Onsight Cube (wearable/modular camera), Onsight Connect (Windows, iOS, Android).
* LifeSize Desktop, for Windows
* Phoner and PhonerLite, for Windows, Voice: G.711, G.722, G.726, GSM, iLBC, Speex, Opus; security: TLS, SRTP, ZRTP
* Polycom PVX, for Windows. Voice: G.711, G.722, G.722.1, G.728, G.729A, Siren Codec; Video: H.261, H.263, H.264; Data: T.120, People+ Content, H.239, H.323 Annex Q far-end camera control

### Discontinued

* QuteCom, formerly named OpenWengo, using Qt libraries, GPL, for Windows, Mac, and RPM- DEB-based Linux, discontinued in 2016
* Gizmo5, formerly PhoneGaim, discontinued in 2011
* Empathy, using GTK libraries and Telepathy framework, GPL, discontinued in earliest visible, 2021.
* Windows Messenger versions 4 and 5 (not to be confused with Windows Live Messenger or MSN Messenger which do not support SIP)

## Mobile clients
### Free and open-source license

* Jami for Android, iOS; GPL v3
* Linphone for Android, BlackBerry, iPhone, Windows phone; GPL v2
* Sipdroid for Android, GPL v3

### Proprietary license

* Acrobits for iOS and Android

## Session border controllers

* Acme Packet Session Director
* Audiocodes Mediant
* Genband Quantix SBC
* Ingate Systems Ingate SIParators
* Metaswitch Perimeta
* Kamailio

## Enabled firewalls

* Check Point VPN-1 firewalls, include complete SIP support for multiple vendors
* The firewall feature in Cisco IOS includes complete SIP support
* Cisco PIX/ASA firewalls include complete SIP support
* D-Link Firewall DFL-210/260/800/860/1600/2500 supports SIP (SIP-ALG) with firmware 2.20.01.05 and above
* Fortinet, all FortiGates running v280/v300 builds
* Intertex SIP transparent routers, firewalls and ADSL modems, for broadband deployments and SOHO market
* Juniper Networks Netscreen and SRX firewalls include complete SIP Application Layer Gateway support
* Linux Netfilter's SIP conntrack helper fully understands SIP and can classify (for QOS) and NAT all related traffic
* Netopia Netopia supports ALG
* PF, built-in OpenBSD firewall PF can handle the NAT through the "static-port" directive and the bandwidth control through the built-in queuing system of SIP connections
* pfSense, a firewall/router distribution based on FreeBSD and PF; has QoS that properly tags VoIP traffic and a SIP proxy package that is available for NATed endpoints. Its functionality can be expanded with packages like FreeSWITCH, a free/open source software communications platform for making SIP, voice and chat driven products.
* Secure Computing, SnapGear firewall includes siproxd SIP proxy, Sidewinder 7 firewall includes a SIP proxy
* SonicWall, supports SIP
* ZyXEL ZyWALL P1, 2Plus, 5 UTM, 35 UTM, 70 UTM, 1050, USG 100, USG 200, USG 300, USG 1000 supports SIP-ALG

## Libraries

* oSIP

## Test tools

* Codenomicon Defensics: commercial test automation framework
* Ixia (company) commercial SIP-VoIP and Video test and emulation and load test platform
* Mu Dynamics: commercial SIP-VoIP, RTSP-IPTV Triple Play service assurance platform