Fast, Modern, Secure SIP Client

Sipnetic is a free VoIP softphone based on the SIP protocol. It allows you to connect to your VoIP provider, cloud PBX, or an enterprise telephony server.

Voice over IP (VoIP) technology offers many attractive advantages over the legacy telephony. It is often cheaper and provides some advanced features, such as video calls, instant messages, or data encryption.

Key features

  • Compatibility with all standards-compliant VoIP providers and PBXes.

  • Supports calling over 3G/4G and Wi-Fi.

  • Modern UI.

  • Great audio quality provided by the Wideband Opus codec. Legacy codecs, such as G.722, G.711, Speex, and GSM, are also supported.

  • Acoustic echo cancellation and automatic gain control.

  • Video calls using H.264 and VP8 codecs.

  • Support for various NAT traversal techniques, including STUN, TURN, and ICE.

  • Instant Messaging with text and voice chat capabilities.

  • Secure calls based on TLS, SRTP, and ZRTP protocols. End-to-end encryption of chat messages with OTRv3 protocol.

  • Integration with system contacts including built-in contact editor.

  • Presence information support based on the SIMPLE protocol suite.

  • Multiple SIP accounts support with automatic account selection.

  • Ability to quickly configure an account by scanning a QR code.

  • Advanced telephony features: support for multiple calls, placing call on hold, attended transfer, sending DTMF digits, number rewriting, voicemail message waiting indication.

  • Experimental Walkie-Talkie mode well suited for low-bandwidth links.

  • Eight UI color themes.

  • No ads, no user tracking, no personal data collection.

  • Available in English, German, Dutch, Russian, and Ukrainian.


Sipnetic doesn’t offer a VoIP service. To use Sipnetic you need an account from a SIP service provider. Some features may be not supported by all SIP providers.