Server Software
| Program | Operating systems | License | Protocols/based upon/compatible with | Encryption | Other capabilities | Key and target markets | Latest release |
|---|---|---|---|---|---|---|---|
| 3CX Phone System | Microsoft Windows | Closed | SIP | TLS, SRTP | Voice and Video IP telephony, Voice and Video conferencing, voice mail and instant messaging | 25,000 - 50,000 users | 11 (Jul 2012) |
| AS5300 | Linux, Windows Server 2003 | Closed | 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 | 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 / Free software | 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) | 11.1.0
1.8.18.0 |
| CallMax Softswitch | Linux | Closed 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 | 8.5 |
| 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 | Closed Proprietary | SIP, H.323 | 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 | Closed Proprietary | SIP, XIMSS Protocol, XMPP | SSL, TLS, | SIP Registrar/Proxy, Authentication, Diameter, RADIUS, ENUM, and many others... | Mobile Operators, ISP's, and SaaS providers | 5.4c1 (January 2011) |
| Elastix | Linux | GPL / Free software | SIP, IAX, H323, XMPP | Unified communication server that also supports chat, mail and fax. | Capacity dependent on server design, scalable across multiple servers | 2.0.3 | |
| FreeSWITCH | Linux/BSD, Mac OS X, Solaris, Windows | Mozilla Public License / Free software / Open source | 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 | 1.2.5 |
| GNU Bayonne | GNU/Linux, ?? | GNU GPL | SIP (GNU Bayonne 2), ?? | ?? | "free, scalable, media independent software environment for development and deployment of telephony solutions for use with current and next generation telephone networks" | v2.3.2, 2007 | |
| GNU Gatekeeper | Linux/FreeBSD, Mac OS X, Windows XP/2000/Vista/Windows 7 | GPLv2 / Free software | 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 | Closed 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 / GPLv2 | CELT / Speex | 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) | 1.2.3 (February 19, 2011) |
| Mysipswitch | Linux | BSD / Free software / Open source | 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 | Closed Proprietary | SIP | 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 / Free software | SIP, XMPP | SIP Registrar/Proxy, Authentication, Diameter, RADIUS, ENUM, least-cost-routing and many others. | SIP Service Providers | 3.3.1 | |
| snom ONE (formerly pbxnsip) | Linux/BSD, Mac OS X, Windows | Closed 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 | Closed Proprietary | SIP | TLS, SRTP | Secure Unified Communications, Presence, Instant Messaging/Chat, VoIP, Video, Desktop Sharing, File Sharing, IVR, PBX, Voicemail, ACD, Email Server | SIP Service Providers | 5.3 (August 2011) |
| SIP Express Router (SER) | Linux/BSD, Solaris | GPL / Free software | SIP | SIP Registrar/Proxy, Authentication, Diameter, RADIUS, ENUM, and many others... | SIP Service Providers | 2.0.0 Ottendorf | |
| sipX ECS IP PBX | Linux | L-GPL / Open source | Native SIP Call Control | HTTPS, 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 | Closed 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 | Closed 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 / Free software | SIP, IAX, H.323, XMPP | 4.2, August 2012 |
Read more about this topic: Comparison Of Vo IP Software