As a public medium, calls made across the Internet can in theory 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 privacy.
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Latest release |
| Abbeyphone |
Windows XP/2000 |
Closed Proprietary |
SIP |
|
|
|
| AGEphone |
Windows XP/2000, PocketPC, Windows Mobile |
Freeware / Closed Proprietary |
SIP, SDP, RTP, STUN, UPnP |
|
Recording, Voice Mail, Multiple Services at Once, Outlook Support, Call Forwarding |
1.50, 29/09/2006 |
| BitWise IM |
Linux, Mac OS X, Windows |
Freeware / Closed Proprietary |
|
Blowfish |
File transfer, whiteboard |
1.7.2 |
| Brosix |
Windows |
Freeware / Closed Proprietary |
|
AES |
Text chat, Video, File transfer, Whiteboard, Co-Browse, Voice mail, Voice conference |
1.7.2 |
| Cisco IP Communicator |
Windows |
Closed Proprietary |
SCCP (Skinny) / TFTP |
|
|
2.0.2 |
| Coccinella |
FreeBSD, Linux, Mac OS X, Windows |
GPL Free software |
XMPP, Jabber, IAX |
Supports TLS/SSL and SASL |
File transfer, whiteboard |
0.95.15 |
| Cornfed SIP User Agent |
Linux |
Freeware / Closed Proprietary |
SIP, SDP, RTP |
|
Command-Line Interface (CLI) and Gnome GUI clients |
1.0.1 |
| CounterPath eyeBeam |
Windows, Mac, Linux |
Closed Proprietary |
SIP, STUN, ICE, TLS, SRTP |
SRTP, TLS |
Video, IM, Conferencing, Multiple login account, QoS, Outlook integration, Call transfer, 6 lines |
1.5 |
| CounterPath X-Lite |
Windows, Mac, Linux |
Freeware |
SIP, STUN, ICE |
|
Video, IM, Conferencing, Multiple login account |
3.0 |
| damaka |
Windows |
Freeware |
SIP |
Always end-to-end encrypted using unspecified algorithm. |
CallOuts™, video, desktop sharing, voice commands, file-sharing, SMS, IP Radio, RSS reader |
2.5 (December 26, 2006) |
| DingoTel |
Windows |
Freeware |
Proprietary protocol, SIP, H.323 |
Some of the Dingotel traffic is encrypted. |
Has a 2-way radio feature, so one can tunnel FRS through the internet. |
|
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Latest release |
| Ekiga |
Linux, Windows support in progress |
GPL Free software |
SIP, H.323, STUN |
|
Video, IM |
2.0.4. (January 21, 2007) |
| Express Talk |
Windows |
Freeware |
SIP |
|
6 Lines, multiple accounts, conferencing, transfers, recording, |
2.02 |
| Eyeball Chat |
Windows |
Freeware |
|
|
Free VoIP, video and IM |
2.2 |
| fring |
Nokia S60 2nd and 3rd Edition |
Freeware |
SIP, Proprietary protocol |
Encrypted |
Free mobile VoIP, Skype, SkypeOut, MSN, Google Talk, GSM, IM, 3G, GPRS, Wi-Fi, PC to phone, Phone to PC |
3.01 |
| Gizmo |
Linux, Mac OS X, Windows XP/2000 |
Freeware |
SIP, XMPP, Jabber |
SRTP |
Recording, voicemail, Jabber IM, Gizmo Call Out, Gizmo Call In, Talk with Yahoo! Messenger, Google Talk, or Windows Live user |
3.0.0.266 March 09, 2007 |
| GE2006 |
Windows Only |
Freeware |
|
Cryptography & CP |
Video, voice mail, missed calls |
|
| Globe7 |
Linux, Mac OS X, Windows XP/2000 |
Freeware |
SIP |
SRTP |
Call landline, mobile, Free call to 25 destinations, VOD, SMS, Free US DID number. |
7.0.0.0 Jan 1, 2007 |
| Google Talk |
Windows XP/2000 |
Freeware (libjingle is Free software |
XMPP, Jabber |
|
Chat, file transfer, voicemail, mail via "GMail Integration" |
1.0.0.100 |
| GoSIP |
Linux, Mac OS X, Windows XP/2000,Windows Mobile |
Freeware |
SIP |
|
|
January, 2007 |
| iCall |
Windows XP/2000 |
Freeware |
SIP |
|
Free PC to Phone calling in the US and Canada, Voicemail |
|
| iChat AV |
Mac |
Closed Proprietary |
SIP AIM ICQ Jabber H263 H264 |
|
Integrated, PBX independent |
January 2007 |
| is-phone |
Windows XP SP2 |
Trial / Proprietary |
SIP |
|
Integrated into IBM Lotus Notes/IBM Lotus Sametime, PBX independent |
January 2007 |
| iVisit |
Windows & Mac |
Freeware / Closed Proprietary |
Proprietary P2P protocol |
|
8-way videoconferencing, file sharing, recording in QuickTime format |
3.6.3 (verified on July 7th, 2006) |
| Jabbin |
Linux, Windows |
GPL Free software |
Libjingle, XMPP, Jabber |
SSL |
Instant messaging, file transfer, compatible with Google Talk |
2.0b2 |
| KCall |
Linux |
GPL / LGPL Free software |
SIP |
|
|
0.5.2 (10th July 2005) |
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Latest release |
| KPhone |
Linux |
GPL Free software |
SIP |
SRTP |
Video, voice, IM, external Sessions |
1.0.2 (22nd September 2006) |
| Lotus Sametime |
Linux and Microsoft Windows (Mac OS X expected in 2007) |
Closed Proprietary |
SIP, SIMPLE, T.120 and H.323 |
|
|
7.5 (2006) |
| Lynxphone |
Windows, Mac OS X, Linux, NetBSD, FreeBSD |
Freeware |
SIP, STUN, ICE, TLS, SRTP |
SRTP, TLS |
Voice only, multiple-language support, Windows Address Book integration, skins, custom ringtones |
0.5.5 |
| MindSpring (formerly Vling) |
Windows 2000, Windows XP |
Freeware |
SIP, XMPP |
|
Instant messaging, PC to phone, file transfer, free voicemail |
2.0 |
| Minisip |
Windows XP, 2000, Linux, Pocket PC |
GPL / LGPL Free software |
SIP |
SRTP, TLS, MIKEY (DH, PSK, PKE), end to end encryption |
Video, IM Conferencing |
|
| Mirial (DyLogic) |
Windows 2000/XP/2003 |
Closed Proprietary |
SIP, H.323 |
|
- Video capture
- Call log
- Contact management
- H.264 video support
- 4CIF video format
- DV camera inputs
- Support for Microsoft Office
- Integrated Answering Machine
|
4.5 (February 3, 2006) |
| OpenH323 and OPAL |
Linux, Mac OS X, Windows, PocketPC, VxWorks |
MPL free software |
H.323 |
|
|
OpenH323: 1.19.0.1 (June 12, 2006), OPAL: 2.2.3 (October 9, 2006) |
| PeerMe |
Windows 2000 or Windows XP |
Freeware |
|
|
|
|
| PhoneGaim |
Linux (Linspire), Windows XP/2000 |
GPL free software |
SIP |
|
|
|
| Phoner and PhonerLite |
Windows |
Freeware |
SIP, CAPI |
SRTP |
recording, voicemail |
Phoner: 1.92 (January 2nd, 2007), PhonerLite: 1.19 (January 1st, 2007) |
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Latest release |
| PJSIP |
Linux, Win32 (NT/200/XP), WinCE/Windows Mobile, Mac OS X, FreeBSD, RTEMS, Symbian, etc |
GPL free software/Closed Proprietary |
SIP |
TLS |
Media stack included, Python API |
0.5.10.1 (20 February 2007) |
| ReSIProcate |
Linux, Mac OS X, Windows |
Vovida Software License (open source) |
SIP |
TLS, Identity, Digest-Authentication |
SIP Stack, Dialog layer (DUM), Proxy (repro) |
1.1 (March 30th, 2007) |
| SecurePTT |
Microsoft Windows / Symbian OS |
Closed Proprietary |
Proprietary protocol, RTP |
AES-256 encryption, RSA-2048 key exchange |
SecurePTT Voice communication, SecurePTT Camera, SecurePTT Chat |
1.5 |
| SightSpeed |
Mac OS X / Windows |
Freeware |
SIP |
|
|
6.0 |
| SIP Communicator |
Linux, Mac, Windows XP/2000 (all java supported) |
LGPL free software |
SIP/SIMPLE, Jabber |
|
Text messaging |
|
| SJphone |
Windows 2000/Windows XP, Windows Vista, Mac OS X, Linux, Windows Mobile 5 |
Freeware |
SIP, RTP, STUN, Jabber, H.323 |
|
Customisation for ITSP |
Windows XP/Vista: 1.65 beta (Mar 27.2007) |
| Skype |
Windows 2000/XP, Mac OS X, Linux, Pocket PC |
Freeware |
Proprietary P2P protocol |
Encrypted |
Video, file transfer, voicemail, Skype to phone, phone to Skype, additional P2P extensions (games, whiteboard, etc...) |
Windows: 3.0.0.214, Linux: 1.3.0.53, Mac OS X: 2.5.0.85 (All as of Feb 05, 2007) |
| SmeetX, Smeet SDK |
Linux, Microsoft Windows |
|
SIP, H.323, STUN, proprietary P2P protocol |
Optional encryption plugin (default: Blowfish) |
Video (H.263, H.263+ and MPEG-4), ActiveX control, XML, SgkiP |
1.2.4 (September 2006) |
| SoftBX |
Microsoft/Windows XP/Windows Mobile 5 |
Closed Proprietary |
SIP, H.323, |
|
3 way/multi-party conference, presence display, operator, call centre agent |
4.1.1003 (January 2007) |
| Switchboard, The |
Windows 2000/XP, Mac OS X, Linux, OS/2, and any other Java enabled platform |
Freeware |
Proprietary P2P protocol |
Encrypted |
web-based (no installation), conferencing, file transfer, ICQ, AIM, and MSN compatibility |
3.2 (March 2007) |
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Latest release |
| TelTel |
Windows |
Freeware |
SIP, STUN |
TLS, SRTP |
IM, TelTel-Out, TelTel-In |
0.9.2.18 |
| TERAVoice Server |
Windows 2000, XP, 2003, Vista |
Freeware / Closed Proprietary |
SIP, H.323, ISDN, analog |
TLS |
Soft-PBX, IVR, Voicemail, Voice Portal Server |
2004 (17th of April 2005) |
| Tivi |
Windows, many cell phones, Nokia smartphones |
Freeware |
|
|
tivi-to-land line |
Video call: 0.127a, Lite: 0.602. |
| Twinkle |
Linux |
GPL free software |
SIP |
SRTP, ZRTP |
|
1.0 (January 22, 2007) |
| Vbuzzer |
Windows XP |
Closed / Proprietary freeware |
SIP |
TLS |
IM (MSN), voicemail, personalized voice greeting. |
2.0.282 |
| VoipDiscount |
Windows 2000/XP |
Freeware |
SIP |
|
|
|
| VOIspeed |
Windows 2000/XP |
Freeware |
SIP |
|
IPBX, IVR, CRM integration, LCR, Voicemail |
4 |
| WengoPhone |
Linux, Mac OS X, Windows XP/2000 |
GPL free software |
SIP |
|
Video, IM (Yahoo!, MSN, Jabber, GoogleTalk), voicemail, wengo to phone. |
v2.0 RC5 (October 18, 2006), v2.1 RC1 (March 9, 2007) |
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Latest release |
| Windows Live Messenger |
Windows 2000/XP |
Freeware |
SIP, RTP, proprietary |
|
Video, voice, chat, text messaging, PC to Phone |
|
| Yahoo! Messenger |
Microsoft Windows, Mac OS (8, 9, X), (Linux/FreeBSD version not VoIP capable) |
Freeware |
SIP (using TLS) and RTP (media) |
|
Video, file transfer, PC to phone, phone to PC |
|
| XMeeting |
Mac OS X |
BSD free software |
SIP, H323, STUN |
|
Video, call recording |
v0.33 |
| Zfone (formerly PGPfone) |
Linux, Mac OS X, Windows |
Viewable source / Proprietary license (includes time bomb provision) |
SIP and RTP |
SRTP, ZRTP |
|
Beta (6th of December 2006) |
| Zoiper |
Linux, Mac OS X, Windows |
Freeware + proprietary |
SIP, RTP, STUN, IAX, IAX2 |
|
native conferencing, address book, outlook integration, click to dial |
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Latest release |
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Key and target markets |
Latest release |
| 3cx phone system |
Windows XP, 2000, 2003. |
Freeware / Closed Proprietary |
SIP |
|
IP PBX |
SMB |
2.0 |
| Asterisk PBX |
Linux for PPC, OpenBSD, FreeBSD, Mac OS X Jaguar. |
GPL free software / Proprietary |
SIP, H.323, Inter-Asterisk eXchange |
|
|
|
|
| Brekeke PBX |
Windows and Linux. |
Shareware 60-day trial / Closed Proprietary |
SIP |
|
IP PBX |
Carriers, ITSP, Enterprise |
2.0 |
| CommuniGate Pro |
Solaris, Linux, BSD, OSX, Windows, AIX, HPUX |
Freeware / Closed Proprietary |
SIP, XMPP, XIMSS |
TLS/SSL/HTTPS/SRTP/File Encryption/Cert Authority |
VirtualPBX, Conferencing, ACD, Development environment, Flash UI |
Carriers, IT-SP, Enterprise |
5.1.x |
| GNU Gatekeeper |
Linux, Mac OS X, Windows XP/2000, FreeBSD |
GPL Free software |
H.323 |
|
Routing, Accounting, AUthorization |
|
2.2.4 |
| NetUP UTM billing software |
Linux, FreeBSD, Solaris, Windows (NT, 2000, XP, 2003) |
Closed Proprietary |
H.323, SIP |
RADIUS |
Java-based multiplatform administration interface |
VoIP providers and ISP |
5.2.1-001 |
| OpenSER |
Linux, BSD, Solaris |
GPL free software Open source |
SIP |
TLS |
ENUM, IM, XMPP IM gateway, SMS gateway |
Carrier, ITSP, Enterprise |
1.1.0 |
| PACER |
Windows, Linux, Solaris, AIX, HPUX |
Closed Proprietary |
|
TLS, SSL, HTTPS |
IVR, Voice broadcasting, Virtual PBX, ACD, XML Messaging, Development environment |
Enterprise, Developer, Service Providers |
12.1 |
| pbxnsip |
Windows, Linux, BSD |
Closed Proprietary |
SIP |
TLS for signalling, SRTP and SDES for media and key exchange |
Call Recording, Barge In, NAT-Traversal, Trunking |
Appliances, CPE and Hosted Server Farms |
1.5.2 (release), 2.0 (beta) |
| Solegy-OSS Desktop Dialer |
Microsoft Windows |
Freeware |
SIP |
Hash (CBCOM mode) Encryption |
Call transfer (SIP REFER), IM (SIP/SIMPLE or Jabber), NAT Traversal (STUN), multiple codecs (iLBC, Speex, GSM, G.711, G.723, etc.) |
Service Providers, Developers |
Beta (December 2006) |
| SIP Express Router (SER) |
BSD, Linux, 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 |
Open source L-GPL |
Native SIP Call Control |
HTTPS, TLS |
Full redundancy (HA), plug & play management including phones and gateways, fully featured, 100% SIP standards based |
Enterprises between 200 and 10,000 users, multi-site |
3.6, Feb 12, 2007 |
| SoftBX |
Microsoft/Windows XP/Windows Mobile 5 |
Closed Proprietary |
SIP, H.323, CAPI 2.0, |
|
4-2000 users/per server, up to 128,000 ITSP platform, Voice Mail, Conference, Call Centre |
ITSP Hosting Platforms, PBX replacement, Appliances |
4.2.1003 (January 2007) |
| *starShop |
|
Open source GPL |
Based on Asterisk PBX |
|
(PBX, not client) |
Calling Shops and Internet cafes. |
0.02 (29th of November 2005) |
| SWYX |
Microsoft Windows XP/2000/2003 |
Closed Proprietary |
SIP, H.323, CAPI 2.0, |
|
Too Many to List |
Businesses from 5 users to 10000 Users |
6.01 Maintenance Pack 3 (16th March 2007) |
| SIP Express Media Server (SEMS) |
Linux / FreeBSD |
Open source GPL |
SIP,RTP |
|
Voicemail, IVR, conference mixing, embedded Python interpreter, multiple codecs (iLBC, GSM, G.711, etc.) |
SIP Providers |
0.10.0_rc2 |
| YATE |
Linux, Windows |
GPL / MPL free software |
H.323, IAX, RTP and SIP |
|
Audio conference, PBX, E1/T1, ISDN, VoIP analyzer, PostgreSQL and MySQL support, IVR |
|
| Program |
Operating systems |
Licence |
Protocols/based upon/compatible with |
Encryption |
Other capabilities |
Key and target markets |
Latest release |
