| | SIP clients | Jitsi | Blink Lite | microSIP | Sfl phone | QuteCom | Ekiga | Linphone | SIPDroid | Csipsimple |
| | www | jitsi.org | Icanblink
.com | microsip
.org.ua | sflphone.org | qutecom.org | ekiga.org | linphone.org | sipdroid.org | code.google
.com/p/
csipsimple |
| | License | LGPLv3 | GPLv3 | GPL | GPLv3 | GPL | GPL | GPLv2 | GPLv3 | GPL |
| | Release | 1.0-beta1-3689 | 0.2.7 | 1.8.2 | 0.9.13 | 2.2.1 | 3.2.7 | 3.4.3 | 2.3 | 0.2.3 |
| | Date | 4.10.2011 | 25.5.2011 | 15.10.2011 | 5.4.2011 | 9.5.2011 | 31.5.2010 | 25.3.2011 | 24.6.2011 | 19.6.2011 |
| | Operating system | Win, Linux, Mac X | Win, Linux, Mac | Win | Linux | Linux, Mac OS, Win, | Linux, Win | Linux, Win, Mac, Android, WebOS | Android | Android |
| | Multiple accounts | Yes | Yes | No | Yes | Yes | Yes | Yes | No | No |
| | Audio | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | | G722, | G722, | Speex, | G722, | iLBC, | G722, | speex, | G.722HD, | Speex, | | G728, | speex, | PCMU, | speex, | PCMA, | G728, | GSM, | PCMU, | PCMU, | | speex, | GSM, iLBC, | PCMA, | GSM, | PCMU, | G726, | PCMU, | PCMA, | PCMA, | | GSM, iLBC, | PCMU, | GSM, iLBC, | PCMU, | G.722, | G721speex, | PCMA, | speex, | GSM, iLBC, | | PCMU, | PCMA | SILK, | PCMA, celt | Licensed: | GSM, | G.722 | GSM, BV16 | SILK, G.722 | | PCMA, | | G.722 | | AMR, AMR- | PCMU, | | | | | DVI4 | | | | WB, G.729 | PCMA, celt | | | |
| | Video | Yes
H264,
H263 | No | No | No | Yes
H.263 | Yes | Yes | Yes | No | | H264, | H264, | | H263, | H263, H263- | | H261 | 1998, | | theora | MPEG4, | | theora |
| | DNS SRV/NAPTR | Yes | Yes | Yes | No | Yes | Yes | Yes | — | — |
| | SIMPLE | Yes | No | Yes | No | Yes | Yes | Yes | — | Yes |
| | IM | Page/session mode | — | Page mode | Page mode | Page mode | Page mode | Page mode | — | Page mode |
| | XCAP | Yes | Yes | No | No | No | No | No | — | — |
| | TLS | Yes | Yes | Yes | Yes | No | No | Yes | — | Yes |
| | Media encryption/key manag. | SRTP/ZRTP, MIKEY on progress | SRTP | SRTP | SRTP/ZRTP | SRTP/key exchange over Everbee | No | No | Not officially confirmed | SRTP/ZRTP |
| | NAT | No | ICE | STUN, ICE | STUN | — | STUN | STUN | STUN | STUN, ICE |
| | Communication protocols | SIP, XMPP, AIM/ICQ, MSN,
Yahoo! | SIP | SIP | SIP, IAX | SIP, MSN, YIM, AIM, ICQ, XMPP | SIP, H.323 | SIP | SIP | SIP |
| | Transport protocols | TCP, TLS, UDP | TCP, TLS, UDP | TCP, TLS, UDP | UDP, TLS/SSL | UDP | UDP | UDP, TCP, TLS | UDP, TCP | UDP, TCO, TLS |
| | IPv4/IPv6 | Yes/Yes | Yes/No | Yes/No | Yes/No | Yes/No | Yes/No | Yes/Yes | — | — |
| | Voice mail | Yes | Yes | No | Yes | — | No | No | — | — |
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