Linphone
Linphone is an open source voice over IP (VoIP) phone and instant messaging client for Linux, Windows, macOS, iOS and Android. It supports standard voice and video calls as well as instant messaging between Linphone clients.
Linphone: Free Open Source VoIP Phone
Linphone is an open source voice over IP (VoIP) phone and instant messaging client for Linux, Windows, macOS, iOS and Android, supporting standard voice and video calls as well as instant messaging between Linphone clients.
What is Linphone?
Linphone is a free voice over IP (VoIP) service that allows you to make audio and video calls over the internet. Developed by Belledonne Communications, Linphone is an open source application available for Linux, Windows, macOS, iOS and Android operating systems.
As a softphone application, Linphone relies on SIP protocol to make high quality calls without the need for traditional phone lines. Instead, it utilizes your computer or mobile device's internet connection and bandwidth to route calls. This allows you to talk to anyone else using a SIP address free of charge.
Key features of Linphone include:
- HD audio and video calling support
- Instant messaging and presence capabilities
- Call encryption with ZRTP
- Audio codecs like Speex, G.729, GSM, iLBC
- Video codecs H.263 and H.264
- Call transfer, call waiting, call hold functions
- Answering machine support
- Available in over 20 languages
In addition to basic VOIP calling features, Linphone stands out with its encryption capabilities for secure communications. It implements ZRTP protocol to encrypt calls end-to-end between Linphone clients. The app also supports TLS and SRTP for encryption.
As an open source project under GPLv2 license, Linphone is free to download and use. The source code is available for developers wanting to expand the software or integrate it into their own projects. Overall, Linphone provides a full-featured VoIP client for HD voice and video calls across platforms.
Linphone Features
Features
- Voice over IP calling
- Video calling
- Instant messaging
- Call encryption
- Call recording
- Call transfer
- Audio codecs (Speex, G.711, G.722, G.729, MP3, AMR, etc.)
- Video codecs (H.263, H.264, VP8, H.265)
- NAT traversal using ICE protocol
- Echo cancellation
- DTMF support
- Presence and buddy lists
- Address book integration
- Call logs
- Conference calling
- Call waiting
- Caller ID
- Message waiting indication
Pricing
- Open Source
- Free
Pros
Free and open source
Cross-platform availability
End-to-end encryption
Good call quality
Active development and support
Cons
Limited native integration with mobile OS
Less features than proprietary alternatives
Smaller user base than competitors like Skype
Official Links
Reviews & Ratings
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