Blink is the best real-time communications client using the SIP protocol.
You can use it with many SIP providers, on the LAN using Bonjour and with SIP2SIP, a free service.
- OSX Integration (iCloud, iTunes, Address Book, Keychain, Voice Over)
- Clear audio using Opus codec optimised for full spectrum audio
- Telephony compatible codecs: AMR, G.711, G.722
- Video calls using H.264, VP8 and VP9 codecs
- Acoustic echo cancelation
- Presence (SIP SIMPLE RLS and XCAP protocols)
- Chat and File Transfers sessions (MSRP protocol)
- Instant Messaging (SIP Message)
- Screen Sharing (VNC protocol)
- Multiparty conferencing (audio, chat and file transfers)
- End-to-end chat encryption (OTR protocol)
- End-to-end audio encryption (ZRTP protocol)
- Corporate directory services (LDAP protocol)
- OpenPGP support for SIP messaging
- Compatible with telephony applications (dialpad, call hold, call transfer)
- Fine-grained settings for SIP experts
Blink does not collect any data. Contacts accessed by Blink from system address-book are not uploaded to any servers.