Comparison of VoIP software Software comparison
This is a comparison of voice over IP (VoIP) software that examines applications and systems used for conducting voice and multimedia communications across Internet Protocol (IP) networks. VoIP technology has transformed telecommunications by offering alternatives to traditional telephony systems while providing enhanced features and cost savings.
For residential users, VoIP services typically provide significant cost advantages compared to traditional public switched telephone network (PSTN) services. These systems eliminate geographic restrictions on phone numbers, enabling users to maintain local numbers in any area code regardless of their physical location. For example, a user can operate a New York phone number while residing in Tokyo, facilitating global mobility and reducing international communication costs.
In enterprise environments, VoIP technology enables the consolidation of voice and data networks into a unified IP infrastructure. This consolidation eliminates the need for separate voice and data pipelines while providing advanced capabilities including:
Unified communications integration
Presence management systems
Advanced call routing
Mobile device integration
Multimedia conferencing capabilities Softphone applications serve as the primary client-side implementation of VoIP technology. These applications transform standard computing devices into full-featured communication endpoints, supporting voice and video calls over IP networks while providing standard telephony functions. Most softphone clients utilize the Session Initiation Protocol (SIP), an open standard that supports various audio and video codecs. Some systems, like Skype, operate on proprietary protocols but can integrate with SIP-based systems through specialized business telephone system (PBX) software.
The VoIP ecosystem encompasses various specialized applications beyond basic communication endpoints:
Core components
Conferencing servers for large-scale virtual meetings
Intercom systems for internal communications
Virtual foreign exchange services (FXOs)
Hybrid systems supporting both VoIP and PSTN integration
Specialized applications
Interactive Voice Response (IVR) systems
Automated dictation platforms
Professional call recording solutions
Custom hold music and messaging systems VoIP implementations generally fall into two categories:
Web-based solutions that operate through browsers, offering simplified deployment and platform independence Standalone desktop applications that provide enhanced features, superior reliability, and advanced feature sets
Desktop applications
Program
Operating systems
License
Costs
Protocols
Codecs
Encryption
Max conference peers
Other abilities
Latest release
Blink
Linux , macOS , Windows
Mixed: free software versions under GNU GPLv3 + shareware versions under gplv3 with exception of including proprietary code
macOS version proprietary on App Store, free version limited to sponsored SIP provider; Windows version proprietary; Linux version open source
ICE , SIP , MSRP , RFB (VNC) , XCAP
Opus , speex , G.722 , GSM , iLBC , PCMU , PCMA
TLS , SRTP and ZRTP on all versions, OTR/SMP on Linux and macOS only[ 1] No limit
IM, file transfer, desktop sharing, multi-party conference, wideband
Blink Qt
Battle.net
macOS , Android , iOS , Windows
Proprietary
Free
Unknown
Unknown
Unknown
Unknown
IM, multi-party conference
Unknown
Discord
macOS , Android , iOS , Windows , Linux
Proprietary
Free, Premium "Nitro" Subscription for Additional Features.
RTP , UDP , WS , HTTPS
Opus
TLS
5000 soft limit for voice calls,[ 2] [ 3]
IM, file sharing, desktop sharing, in-game overlay
10.0.19045; December 19, 2024; 8 months ago (2024-12-19 )
Eyeball Chat
Windows
Proprietary
Free
SIP , STUN , ICE , XMPP
Unknown
Yes
5[ 4]
IM, Conferencing, Voice, Video and SIMPLE based presence
Windows 3.2; 2009; 16 years ago (2009 )
FaceTime
iOS , macOS
Proprietary
Free
SIP , IETF , Signaling protocol for VoIP, STUN , TURN and ICE | IETF , technologies for traversing firewalls and NAT
H.264 Video, AAC-ELD Audio, H.263 and VP8
RTP , SRTP IETF |standards for delivering real-time and encrypted media streams for VoIP.
20
Video, voice, conferencing, with additional tools available as "Services".
IBM Sametime
Linux , macOS , Windows , mobile
Proprietary
?
SIP -SIMPLE , T.120
H.323
TLS
Unknown
IM, File transfer, Voice, Presence, Server stored contact list, HTTP tunneling, plugins, embeddable in Lotus Notes [ 5]
8.5.2; May 8, 2011; 14 years ago (2011-05-08 )
Jami
Android , FreeBSD , iOS , iPhone , Linux , Microsoft Windows , OS X [ 6] GPL-3.0-or-later
Free
SIP , RTP , STUN per account, SRV , DHT , P2P
Audio: Opus , Speex , G.722 , G.711 , GSM , VP8 , G.729 , iLBC . Video: H.264 , H.263 , VP8 , MPEG-4
Voice encryption (SRTP with SDES or ZRTP ) and signaling encryption (TLS ), multiple realms authentication mechanism
No limit
Blockchain ID-management, Gnome-KDE client, address book, multiple accounts, unlimited call number, call transfer, call hold-unhold, call recording, multi-way conferencing
iOS 3.28 / December 17, 2021; 3 years ago (2021-12-17 ) [ 7] Android 20211210-01 / December 21, 2021; 3 years ago (2021-12-21 ) [ 8] Windows 202112221025 / December 22, 2021; 3 years ago (2021-12-22 ) [ 9] macOS 2.10 / December 16, 2021; 3 years ago (2021-12-16 ) [ 10]
Jitsi
Linux , macOS , Windows (all java supported). Experimental Android builds are also available.[ 11] Apache-2.0
Free
SIP -SIMPLE , XMPP -Jingle STUN ICE , TURN
SILK , G.722 , Speex , Opus , G.711 (PCMU/PCMA), iLBC , GSM , G.729 , H.264 , H.263 , VP8
ZRTP , SRTP , OTR , TLS
Unknown
Text messaging, audio-video telephony, IPv6 (often broken,[ 12] [ 13]
2.10 (build.5550) (February 5, 2017; 8 years ago (2017-02-05 ) ) [±]
Linphone
Linux , Windows , macOS , Android , iPhone , BlackBerry
GPL-3.0-or-later
Free
SIP
Speex , Opus , G711 , GSM , G.722 , VP8 (WebM), H263 , MPEG4 , Theora and H264 (plugin)
TLS , SRTP , ZRTP
Unknown
Video, IM, STUN, IPv6 (disables IPv4 support when enabled), P2P, Secure Encryption, User own Encryption via Provided API https://gitlab.linphone.org/BC/public/linphone-desktop
4.2.5; June 25, 2020; 5 years ago (2020-06-25 ) , provides daily snapshots via http://www.linphone.org/snapshots [permanent dead link
Messages
macOS
Proprietary
Free, only macOS and iOS
SIP AIM ICQ XMPP
H263 , H264
Unknown
Unknown
Integrated, PBX independent
7.0; July 25, 2012; 13 years ago (2012-07-25 )
Movim
Any, Progressive web application
GPL-2.0-or-later
Free
XMPP , STUN , TURN
Depending the web-browser
TLS
2
IM, microblogging, social-network, OMEMO encryption, screen-sharing, file transfer
2025-07-24
Mumble
Linux , macOS , iOS , Windows , Android
New BSD license
Free
ICE
CELT , Speex , Opus
TLS and OCB-AES128
No limit (limited only by server bandwidth and memory)
Chat with (limited) embedded HTML, Automatic Gain Control , very low latency , Access Control Lists for user management, Customizable In-Game Overlay for OpenGL and DirectX, Directional Audio, Plugin Support, Nested Channels, Echo cancellation for headset free use, Global Public Server List, Logitech G15 support, Push-To-Talk and Voice-Activation
1.4.287; September 14, 2022; 2 years ago (2022-09-14 )
Nymgo
Windows , Android , iOS
Proprietary
Free
SIP , RTP and RTCP
Unknown
Yes
No limit
Address Book integration, Call recording/export, Mute, On Hold, Caller ID definition
4.2.9; March 2013; 12 years ago (2013-03 )
Phoner
Windows
Proprietary
Free
SIP , TAPI , CAPI
G.711a , G.711u , G.722 , G.726 , G.729 , GSM , iLBC , speex , Opus
TLS , SRTP , ZRTP
8
Conferencing, call redirection, call recording
3.23 (5 March 2021; 4 years ago (2021-03-05 ) ) [±] [ 14]
PhonerLite
Windows
Proprietary
Free
SIP
G.711a , G.711u , G.722 , G.726 , G.729 , GSM , iLBC , speex , Opus
TLS , SRTP , ZRTP
8
Conferencing, call redirection, call recording
3.32 (8 August 2025; 34 days ago (2025-08-08 ) ) [±] [ 15]
Roger Wilco GameSpy
Windows
Proprietary
?
Proprietary
MELP
No
Unknown
?
1999; 26 years ago (1999 )
Signal
Linux , macOS , Windows , Android , iPhone
GPLv3 clients and AGPLv3 server
Free
RingRTC (WebRTC over Signal protocol [ 16]
Opus [ 16] TLS , Signal Protocol [ 17] 50[ 18]
Signal also allows users to send text messages, files, voice notes, pictures, GIFs, and video messages over a Wi-Fi or data connection to other Signal users on iOS, Android and a desktop app. The app also supports group messaging, read receipts and typing indicators, both of which can be disabled.
Android 7.53.5[ 19] iOS 7.74[ 20] Desktop 7.68.0[ 21]
Skype
Linux (with limited functionality),[ 22] macOS , Windows 2000-XP-Vista-7-Mobile (unsupported), BREW , Windows Phone , Android , iPhone , PSP
Proprietary
Free
Proprietary P2P protocol [ a]
SILK
TLS
25 starting with version 3.6.0.216. 10 with 2.x
Conferencing, video, file transfer, voicemail, Skype to phone, phone to Skype, additional P2P extensions (games, whiteboard, etc...); depending on platform.
Windows , UWP , discontinued15.150.3125.0 / 5 May 2025; 4 months ago (2025-05-05 ) [ 24] [ 25] [ 26] Windows , desktop, discontinued8.150.0.125 / 5 May 2025; 4 months ago (2025-05-05 ) [ 24] [ 25] macOS , discontinued8.150.0.125 / 5 May 2025; 4 months ago (2025-05-05 ) [ 24] [ 25] Linux , discontinued8.150.0.125 / 5 May 2025; 4 months ago (2025-05-05 ) [ 24] [ 27] Android , discontinued8.150.0.125 / 5 May 2025; 4 months ago (2025-05-05 ) [ 28] [ 29] [ 30] iOS , discontinued8.150.0.125 / 5 May 2025; 4 months ago (2025-05-05 ) [ 28] [ 31]
Steam Chat
Web, Phones, Desktop
Proprietary
WebRTC
TeamSpeak
Linux , Windows , macOS , FreeBSD , Android , iOS
Proprietary
Free
Unknown
CELT , Speex (both until server version 3.5.0), Opus [ 32] Yes
32 unlicensed, 512 with Non-Profit License (available until September 2018), up to 1024 (Gamer License), 2000
Simultaneous server conferencing with tabs, 3D sound effects, scalable permissions system, firewall friendly file transfers, in-game overlay for DirectX & OpenGL games, global public server list, plugin system
3.5.5; November 4, 2020; 4 years ago (2020-11-04 )
TeamTalk
Linux , Windows , macOS , Android , iOS , Raspbian
Proprietary
Free
Proprietary
Opus , Speex , VP8
No
1000
Video, file sharing, desktop sharing, stream media files (MP3 , AVI )
5.3.3; November 2018; 6 years ago (2018-11 )
TeamViewer
Linux , Windows , macOS , iOS, Android[ 33] Proprietary
Free (personal use only)
Unknown
Unknown
AES256
Unknown
Unknown
Windows 15.69.5 / 2 September 2025; 9 days ago (2025-09-02 ) [ 34] macOS 15.69.5 / 2 September 2025; 9 days ago (2025-09-02 ) [ 35] Linux 15.69.4 / 26 August 2025; 16 days ago (2025-08-26 ) [ 36] Android[ b] 15.69.835 / 1 September 2025; 10 days ago (2025-09-01 ) [ 37] [ 38] [ 39] iOS 15.69.1 / 26 August 2025; 16 days ago (2025-08-26 ) [ 40] [ 41] Windows (UWP-only, discontinued) 15.53.6 / 15 April 2024; 16 months ago (2024-04-15 ) [ 34]
Telephone
macOS 10.10.2
BSD
Free
SIP , STUN , ICE
Unknown
No
Unknown
Address Book integration
1.1.4; March 6, 2012; 13 years ago (2012-03-06 )
Tuenti
Android , iPhone , Windows Phone
Proprietary
Free
WebRTC , SIP , XMPP
iLBC , Opus
Yes
Unknown
Voice, video, Instant messaging , group chat, photo and video sharing, SMS and MMS, native and social network contacts integration, incoming call/IM push notifications.
Twinkle
Linux
GPL-2.0-or-later
Free
SIP
G.711 A-law μ-law, G.726 , GSM , iLBC , Speex narrow wide ultrawide
SRTP , ZRTP
3
Conferencing, chat, file transfer, Firefox integration, call redirection, voicemail, support of VoIP-to-Phone services
1.10.3 (February 19, 2022; 3 years ago (2022-02-19 ) ) [±]
Ventrilo
macOS , Windows , iOS , Android
Proprietary
Free
Unknown
Unknown
No
8
Conferencing, chat, text-to-speech
3.0.8
Viber
Linux ,[ c] macOS ,[ c] Windows ,[ c] Android , Bada , BlackBerry OS , iOS , Series 40 , Symbian , Windows Phone
Proprietary
?
Unknown
Unknown
Yes[ 44]
Unknown
Varies by platform: Text, picture and video messaging on all, voice calling only on iPhone, Android and Microsoft's Windows Phone
Android 20.4.3.0[ 45] ; 2 years ago (2 July 2023 ) iOS 20.4.0[ 46] ; 2 years ago (4 July 2023 ) Windows 20.2.0[ 47] ; 2 years ago (12 June 2023 ) macOS 20.2.0[ 47] ; 2 years ago (12 June 2023 ) Linux 20.3.0.1[ 48] ; 2 years ago (14 June 2023 )
Wire
Linux, Windows, macOS, iOS, Android, Web
GPLv3
not free
?
Audio: Opus
Video: VP8
DTLS , SRTP [ 49] 10[ 50]
End-to-end encryption by default for everything, instant messaging, video call, video group call, file sharing, GIF sharing, push to talk, edit message, delete message (on both side), timed messages, doodling, identity verification, screen sharing (desktop only)
?
Yate Client
Linux , macOS , Windows
GPL
Free
SIP , IAX , XMPP , H.323
G.711a , G.711u , GSM 06.10 , iLBC , Speex , G.723 , G.726 , G.728 , G.729
SRTP , maybe ZRTP ?
Unknown
6.0.0; September 2017; 8 years ago (2017-09 )
Zfone
Linux , macOS , Windows
Proprietary (with viewable source)
Includes time bomb provision
SIP , RTP
Unknown
SRTP , ZRTP
Unknown
Beta 2008-09-04 (Linux 0.9.224), (macOS 0.9.246), (Windows 0.9.206)
^ It is possible to connect by SIP to the Skype network via additional "Skype Connect" PBX software and alternative (SIP) client software/hardware. Neither the Skype software nor the Skype network supports SIP directly[ 23]
^ Including ChromeOS
^ a b c Viber must be first installed on a mobile phone to function on a desktop operating system[ 42] [ 43]
Mobile phones
For mobile VoIP clients:
Program
Operating systems
License
Open source
Protocols
Codecs
Encryption
Other abilities
Latest release
Jami
iOS , Android [ 51] GPLv3
Yes
SIP
Video: H264, VP8, MP4V, H263, Audio: Opus 48000 hz, G722 PCMA, PCMU
SRTP , SIP over TLS
?
Version 202103261733 March 2021; 4 years ago (2021-03 )
Line
Android, iOS
Proprietary
No
?
?
?
?
Signal
iOS, Android
GPLv3
Yes
WebRTC [ 17] Opus [ 17] TLS , Signal Protocol [ 17] End-to-end encryption by default for everything. CallKit and location privacy,[ 52] [ 52] [ 53] [ 54]
Android 5.2.3 / 15 September 2023
iOS 6.41.1 / 15 September 2023
Desktop 1.33.4 / 13 September 2023
Tango
iOS, Android, Microsoft Windows, macOS, Windows Phone
Proprietary , freeware
?
?
?
?
VoIP, Wi-Fi out & in, SMS over IP, call-through & call-back, instant messaging, videoconferencing
?
WhatsApp
Android, BlackBerry, iOS, Symbian, Windows Phone
Proprietary , freeware
No
?
?
ECDH , SRTP [ 55] VoIP and instant messaging over Wi-Fi or a data connection.
iOS 25.19.83[ 56] ; 2 months ago (July 8, 2025 ) Android 2.25.19.80[ 57] ; 2 months ago (July 8, 2025 ) Windows 2.2526.2.0[ 58] ; 2 months ago (July 4, 2025 ) macOS 25.19.83[ 56] ; 2 months ago (July 8, 2025 )
Frameworks and libraries
Program
Operating systems
License
Protocols , based on, compatible with
Encryption
Other abilities
Key and target markets
Latest release
Telepathy , Farstream
Linux , macOS , Windows
LGPL
SIP, XMPP (Jingle ), ICE (STUN/TURN), UPnP
No
Multi-user A/V conferencing, IM, collaborative applications
Mobile devices (Maemo, Meego), Linux desktop or embedded
spec 0.27.2; September 24, 2013; 11 years ago (2013-09-24 )
OPAL
Windows , Linux (including embedded variants), macOS
MPL
SIP, H.323, IAX2, CAPI, VXML
Unknown
Multi-user A/V conferencing, IM, IVR
Softphones, softswitches, telephony application servers
3.14.3; October 10, 2014; 10 years ago (2014-10-10 )
GNU oSIP
Linux , Windows , macOS , Android , iPhone , BlackBerry
LGPL
SIP, SDP
Unknown
Multi-user A/V conferencing, IM, IVR
Softphones, embedded and mobile devices, telephony application servers
4.1.0; December 18, 2013; 11 years ago (2013-12-18 )
Server software
Name
Operating systems
License
Protocols
Encryption
Notable features
Target markets
Latest release
3CX Phone System
Windows , Linux
Proprietary
SIP
TLS , SRTP
VoIP /VideoOverIP calls and conferencing, voicemail and instant messaging
< 50,000 users
18.2; December 8, 2021; 3 years ago (2021-12-08 )
AskoziaPBX
Standalone program (Linux -based)
Proprietary
SIP , H.323 , IAX , SCCP
No
ISDN , voicemail , conferencing , MOH , ACD , IVR , call forwarding , call recording
SMEs up to 50 users
5.4; September 2, 2017; 8 years ago (2017-09-02 )
Asterisk PBX
Linux , BSD , macOS , Solaris
GPL-2.0+ , optional: Proprietary [ 59] SIP , H.323 , IAX , MGCP , VoFR , XMPP , Google Talk , TDM
TLS , SRTP
VoIP gateway, voicemail , basic accounting (expandable with ODBC -compliant database), billing, conferencing , hot desking , IVR trees with conditional logic, call waiting , automated call distribution
Enthusiasts, developers, enterprise users (capacity dependent on server design, scalable across multiple servers)
21.3.1 (17 May 2024; 15 months ago (2024-05-17 ) [ 60] 20.5.0 LTS (18 October 2023; 22 months ago (2023-10-18 ) [ 61] ; 2 years ago (2023-07-07 ) [ 62] ; 22 months ago (2023-10-18 ) [ 63]
Brekeke PBX
Linux , Windows Server 2016 and Server 2019
Proprietary
SIP
TLS , SRTP
VoIP /VideoOverIP calls and conferencing, voicemail
Hosted service providers, Mid-large enterprise
3.12.2.2; January 11, 2022; 3 years ago (2022-01-11 )
CommuniGate Pro
Linux , BSD , macOS , Windows , Solaris , HP-UX , AIX
Proprietary
SIP , XIMSS , XMPP , WebRTC
SSL , TLS , SRTP
SIP Registrar/Proxy, Authentication, Diameter , RADIUS , ENUM
Mobile network operators , ISPs , SaaS providers
6.2.14; August 16, 2019; 6 years ago (2019-08-16 )
Dial Gate VoIP Softswitch
Linux , Windows
Proprietary
SIP
TLS , SRTP
Billing server, real-time account and line monitoring, web portal
Softswitch users, service providers
4.3; June 1, 2014; 11 years ago (2014-06-01 )
Dial-Office IP-PBX
Linux , Windows
Proprietary
SIP
TLS , SRTP
Unified communications, conference calls , remote worker support and voicemail
Small businesses, Mid-large enterprises
4.1; December 2013; 11 years ago (2013-12 )
Elastix
Linux
Proprietary
SIP , IAX , H.323 , XMPP
TLS , SRTP
Unified communication server that also supports chat, mail and fax.
Capacity dependent on server design, scalable across multiple servers
5.0.0; December 7, 2016; 8 years ago (2016-12-07 )
FreeSWITCH
Linux , BSD , macOS , Solaris , Windows
Mozilla Public License
SIP , NAT-PMP , STUN , SIMPLE , XMPP , Google Talk (Jingle ), IAX , H.323 , MRCP , RSS , Skype
TLS , SRTP , ZRTP
Recording, Voicemail, Conferencing, RADIUS , ENUM , IM Proxy, Streaming, Media gateway, Soft-PBX, IVR (modular)
Large soft-switch users, home PBX users, softphone users
1.10.11 (December 22, 2023; 20 months ago (2023-12-22 ) [ 64] [±]
FreePBX
Linux , BSD , Solaris
GPL
SIP , IAX , H.323 , XMPP
TLS , SRTP
Complete PABX Service, based on Asterisk and PHP 5.6; provides a full replacement for a legacy non-VoIP phone system; under current and active development
Scales from Raspberry PI (3 users) to multiple parallel clusters (10K+ simultaneous calls)
14.0; August 2017; 8 years ago (2017-08 )
Galene
Linux , Unix , Mac OS , Windows
MIT Licence
WebRTC , WHIP
TLS , SRTP
Lightweight, efficient, easy to install and to administer
Teaching, conferences, meetings
0.96.2; January 2025; 8 months ago (2025-01 )
GNU Gatekeeper
Linux , FreeBSD , macOS , Windows XP-2000-Vista-7
GPL
H.323
H.235
H.460.18 firewall traversal, routing, accounting
video conferencing, VoIP carriers large and small
3.7; August 15, 2014; 11 years ago (2014-08-15 )
HERO Hosted PBX
Linux , Windows
Proprietary
SIP
TLS , SRTP
Unified Communications, billing server, cloud-based management and web interface
Mid-large enterprises, VoIP carriers and service providers, telecom operators
4.3; December 2013; 11 years ago (2013-12 )
Murmur
Linux , BSD , macOS , Windows
BSD , GPL
CELT , Speex , Opus
TLS
Chat with (limited) embedded HTML, ACLs for user management, Customizable In-Game Overlay, Directional Audio, Plugin Support, Nested Channels
Individuals to Small and medium enterprise (25-5000 users)
1.2.17; September 24, 2016; 8 years ago (2016-09-24 )
Kamailio , OpenSIPS (formerly named OpenSER)
Linux , BSD , Solaris
GPL
SIP , XMPP
TLS , SRTP
SIP registrar-proxy, authentication, Diameter , RADIUS , ENUM , least-cost-routing, many others
SIP Service Providers
5.2.8; October 2020; 4 years ago (2020-10 )
SIP Express Router (SER)
Linux , BSD , Solaris
GPL
SIP
No
SIP Registrar/Proxy, Authentication, Diameter , RADIUS , ENUM , many others
SIP Service Providers
2.0.0 Ottendorf
sipXecs IP PBX
Linux
AGPL
Native SIP call control, XMPP
TLS , SRTP
Full redundancy (HA), instant messaging, voicemail, user portal, admin GUI, plug & play management including phones and gateways, fully featured
Enterprises between 10 and 10,000 users, multi-site
14.04.2; July 2014; 11 years ago (2014-07 )
vzRoom
Windows
Proprietary
SIP
SSL , TLS , AES
Instant messaging-chat, VoIP, video, sharing (desktop, video, file), whiteboard, scheduler, recording
Individual to small and medium enterprise (2-1,000 users)
0.8.8.735; November 2010; 14 years ago (2010-11 )
Yate
BSD , Linux , macOS , Windows
GPL
SIP , IAX , H.323 , ISDN , XMPP (Jabber), Jingle (Google Talk ), MGCP , SS7 over IP, Cisco SLT (Signalling Link Transport) (SS7 MTP2 backhaul over IP), SCTP , SCCP , TCAP , MAP CAMEL
SSL , TLS , SRTP
Voice, video, file transfer, data, H323 to SIP signalling proxy, instant messaging, IVR , PC2Phone and Phone2PC gateway, SCCP — GTT routing between networks, Secure Unified Communications, SIP registrar-proxy, SIP SBC (session border controller), USSD, voicemail, VoIP, VoIP to PSTN gateway, conference server (max 200 voice channels per conference), call centre server, prepaid and postpaid cards
Deployed on home servers and large networks with millions of users
6.3; February 2021; 4 years ago (2021-02 )
Secure VoIP software
This section
needs expansion . You can help by
adding to it .
(July 2016 )
This section needs to be updated . Please help update this article to reflect recent events or newly available information. (November 2024 )
VoIP software with client-to-client encryption
The following table is an overview of those VoIP clients which (can) provide end-to-end encryption .
See also
Notes
^ End-to-end authentication protects communications from man-in-the-middle attacks by the service provider.
^ a b Only if the user has registered with a compatible SIP provider. Some SIP providers do not support certain encryption protocols.
^ a b Only the encryption related source code is open.
^ Only on the network connection, not on the end-to-end layer.
References
^ "Download Blink" . Blink Project's Website . 14 January 2016. Retrieved 22 June 2016 .^ "Discord on Twitter" . Twitter . Retrieved 2016-12-29 .^ "Wave Hello to Server Video" . Retrieved 2020-06-21 .^ eyeballchat.com [usurped . EyeballChat.com.^ "Telephony with Lotus Sametime software" . IBM.com. Retrieved 2010-02-16^ "News" . Ring . 2018-07-25. Archived from the original on 2018-12-26. Retrieved 2018-12-01 .^ "Jami" . App Store .^ "Jami - Apps on Google Play" . play.google.com .^ "Index of /windows" . dl.ring.cx .^ "Jami" . Mac App Store .^ "Jitsi (SIP Communicator) Android — Nightly Builds Index" . Jitsi.org. Archived from the original on 2014-11-29. Retrieved 2014-11-15 .^ Interview with Emil Ivov , Deploy360 blog^ "[#JITSI-1166] P2P IPv6 calls still do not work with explicit IPv6 addresses, no matter if brackets are used — Java.net JIRA" . Java.net. Archived from the original on 2014-02-21. Retrieved 2014-02-13 .^ Release history on Phoner download page^ Changelog on PhonerLite download page^ a b "Video calls for Signal now in public beta" . Signal . 2017-03-13. Retrieved 2020-03-02 .^ a b c d Marlinspike, Moxie (14 February 2017). "Video calls for Signal now in public beta" . Open Whisper Systems. Retrieved 22 March 2017 . ^ "Group Calling - Voice or Video" . Signal Support . Retrieved 18 December 2024 .^ signalapp. "Release v7.53.5 · signalapp/Signal-Android" . Retrieved 28 August 2025 . ^ signalapp. "Release 7.74 · signalapp/Signal-iOS" . Retrieved 28 August 2025 . ^ signalapp. "Release v7.68.0 · signalapp/Signal-Desktop" . Retrieved 28 August 2025 . ^ "Microsoft to retire Skype Linux app on July 1" . 9 June 2017.^ "Skype Connect..." skype.com . Microsoft Corporation Inc. Archived from the original on 2014-11-11. Retrieved 15 November 2014 .^ a b c d "Release Notes for Skype for Windows, Mac and Linux" . Skype Support . Retrieved 2025-05-06 .^ a b c "Get Skype" . 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