Comparison of VoIP software
This is a comparison of voice over IP software used to conduct telephone-like voice conversations across Internet Protocol based networks. For residential markets, voice over IP phone service is often cheaper than traditional public switched telephone network service and can remove geographic restrictions to telephone numbers, e.g., have a PSTN phone number in a New York area code ring in Tokyo.
For businesses, VoIP obviates separate voice and data pipelines, channelling both types of traffic through the IP network while giving the telephony user a range of advanced abilities.
Softphones are client devices for making and receiving voice and video calls over the IP network with the standard functions of most original telephones and usually allow integration with VoIP phones and USB phones instead of using a computer's microphone and speakers. Most softphone clients run on the open Session Initiation Protocol supporting various codecs. Skype runs on a closed proprietary networking protocol but additional business telephone system software can allow a SIP based telephone system to connect to the Skype network. Online chat programs now also incorporate voice and video communications.
Other VoIP software applications include conferencing servers, intercom systems, virtual foreign exchange services and adapted telephony software which concurrently support VoIP and public switched telephone network like Interactive Voice Response systems, dial in dictation, on hold and call recording servers.
Some entries below are Web-based VoIP; most are standalone Desktop applications.
Desktop applications
| Program | Operating systems | License | Costs | Protocols | Codecs | Encryption | Max conference peers | Other abilities | Latest release |
| AudioCodes MobilityPLUS | Windows, Android, iOS | SIP, RTP, XMPP, STUN, ICE | G.722 wideband, G.711a, G.711u, iLBC, G.729a, SILK, GSM, VP8, H.264, Opus | Voice, video, IM, Group chat, content sharing, SMS and MMS over IP services, native and social network contacts integration, incoming call/IM push notifications. | |||||
| Avaya Application Server 5300 Soft Client | Windows | SIP, RTP | 2.0; | ||||||
| Blink | Linux, macOS, Windows | macOS version proprietary on App Store, free version limited to sponsored SIP provider; Windows version proprietary; Linux version open source | ICE, SIP, MSRP, RFB, XCAP | Opus, speex, G.722, GSM, iLBC, PCMU, PCMA | No limit | IM, file transfer, desktop sharing, multi-party conference, wideband | Blink Qt | ||
| CSipSimple | Android | SIP, ICE, STUN, TURN | Opus, AMR, G.711, speex, G.722, GSM, iLBC, G.729, iSAC, SILK | SIP SIMPLE messaging, Support for IPv6, Integration with Android operating system with filters and rewriting rules | 1.0.2; | ||||
| Cisco IP Communicator | Windows | SCCP, SIP, TFTP, HTTP | G.722 wideband, G.711a, G.711u, iLBC, iSAC, G.729a, G.729ab | No limit, 2 otherwise | Call Recording, Silent Monitoring, Multiple lines and directory numbers, Configurable speed dial, Calling name and number display, Call Waiting, Call Forward, Call Transfer, Three-Way Calling, Call Park, Call Pickup, Redial, Hold, Barge, Callback, Extension Mobility, Message waiting indicator, iDivert, Meet Me conferencing, Group Pickup, Do Not Disturb, XML Services | 8.6.6; | |||
| CounterPath Corporation Bria | Windows, macOS, iOS, Android | SIP, RTP, XMPP, STUN, ICE | G.722 wideband, G.711a, G.711u, iLBC, G.729a, SILK, GSM, VP8, H.264, Opus | 6 party voice, 3 party video | Voice and video calling, SIP and XMPP messaging support, group chat, file, image and document sharing, contact integration, incoming call/IM push notifications | 5.3.4 | |||
| Discord | macOS, Android, iOS, Windows, Linux | , Premium "Nitro" Subscription for Additional Features. | RTP, UDP, WS, HTTPS | Opus | 5000 soft limit for voice calls, 25 hard limit for video | IM, file sharing, in-game overlay | 59746; | ||
| Ekiga | Linux, Windows, OpenSolaris | SIP, H.323, STUN, Zeroconf, XMPP, RTP | H.263, H.264/MPEG-4 AVC, Theora, iLBC, Speex, SILK, GSM,... | Video, IM, LDAP, Call Forwarding, Call Transfer, Auto-answering, PC to phone, phone to PC, Multiple accounts, USP support, Message waiting indicator, SIMPLE-based presence etc. | |||||
| Empathy | Linux | SIP, XMPP, ICE, Zeroconf | IM, multi-user A/V, collaborative applications | ||||||
| Eyeball Chat | Windows | SIP, STUN, ICE, XMPP | 5 | IM, Conferencing, Voice, Video and SIMPLE based presence | Windows 3.2; | ||||
| eyeBeam | Windows | SIP-SIMPLE | 6 party audio; 3 party video | Voice and Video calling; IM; Import Microsoft Outlook Contacts; USB Support; Call Recording and Conferencing | 1.5.20.1; | ||||
| FaceTime | iOS, macOS | IETF, technologies for traversing firewalls and NAT | H.264 Video, AAC-ELD Audio, H.263 and VP8 | standards for delivering real-time and encrypted media streams for VoIP. | 20 | Video, voice, conferencing, with additional tools available as "Services". | |||
| Google Hangouts | Linux, Windows, macOS, Android, iOS | XMPP | H.264/SVC, H.264/AVC, H.263 and VP8 | 10 | Video, chat, screen sharing, with additional tools available as "Hangout Apps". | ||||
| IBM Sametime | Linux, macOS, Windows, mobile | SIP-SIMPLE, T.120 | H.323 | IM, File transfer, Voice, Presence, Server stored contact list, HTTP tunneling, plugins, embedable in Lotus Notes | 8.5.2; | ||||
| Jami by Savoir-faire Linux | Android, FreeBSD, iOS, iPhone, Linux, Microsoft Windows, OS X | 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 | 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 | ||||
| Jitsi | Linux, macOS, Windows. Experimental Android builds are also available. | SIP-SIMPLE, XMPP-Jingle STUN ICE, TURN | SILK, G.722, Speex, Opus, G.711, iLBC, GSM, G.729, H.264, H.263, VP8 | Text messaging, audio-video telephony, IPv6, call recording, 64-bit | |||||
| KPhone | Linux | SIP, STUN, NAPTR-SRV | Video, voice, IM, external Sessions, IPv6 support for UDP | 1.2 | |||||
| Librestream Onsight Connect | Windows, Android, iOS | SIP, RTP, STUN | G.711, H.264, MPEG, and others | Voice, video, conferencing, image sharing, incoming call/IM push notifications. | |||||
| Linphone | Linux, Windows, macOS, Android, iPhone, BlackBerry | SIP | Speex, Opus, G711, GSM, G.722, VP8, H263, MPEG4, Theora and H264 | Video, IM, STUN, IPv6 | 4.1.1;, provides daily snapshots via http://www.linphone.org/snapshots | ||||
| Messages | macOS | , only macOS and iOS | SIP AIM ICQ XMPP | H263, H264 | Integrated, PBX independent | 7.0; | |||
| MicroSIP | Windows | SIP, STUN, ICE, SIMPLE | Speex, iLBC, GSM, G.711, G.722, G.729, SILK, Linear PCM | Video, voice, IM and Presence | |||||
| Mirial Softphone | Windows 2000-XP-2003-Vista-7, macOS | not free | SIP, RTSP | H.323 | H.264 Full-HD 1080p video rx/tx, Two independent lines supporting Call Control and 3-Party videoconference in Continuous Presence, G.722.1/C wideband audio, Call recording/export, DV/HDMI/Component capture, Presentation, Encryption, Far End Camera Control, GPU accel | 7.0.24;, discontinued | |||
| Mumble | Linux, macOS, iOS, Windows, Android | ICE | CELT, Speex, Opus | No limit | Chat with 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 | 1.3.0; | |||
| Nymgo | Windows, Android, iOS | SIP, RTP and RTCP | No limit | Address Book integration, Call recording/export, Mute, On Hold, Caller ID definition | 4.2.9; | ||||
| oovoo | macOS, iOS, Windows, Android | SIP, RTP and RTCP | 12 | Address Book integration, Call recording/export, Mute, On Hold, Caller ID definition | 4.2.9; | ||||
| Phoner | Windows | SIP, TAPI, CAPI | G.711a, G.711u, G.722, G.726, G.729, GSM, iLBC, speex, Opus | 8 | Conferencing, call redirection, call recording | ||||
| PhonerLite | Windows | SIP | G.711a, G.711u, G.722, G.726, G.729, GSM, iLBC, speex, Opus | 8 | Conferencing, call redirection, call recording | ||||
| QuteCom | Linux, macOS, Windows XP-2000 | SIP | G.711, G.729, iLBC, AMR-NB, G.722, Speex, AMR-WB, H.263, H.263+, H.264, Dirac | Video, IM, voicemail, wengo to phone, conferencing. | |||||
| Roger Wilco GameSpy | Windows | Proprietary | |||||||
| Signal | Linux, macOS, Windows, Android, iPhone | RingRTC | Opus | 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. | |||||
| Skype | Linux, macOS, Windows 2000-XP-Vista-7-Mobile, BREW, Windows Phone, Android, iPhone, PSP | Proprietary P2P protocol | SILK | 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 ; depending on platform. | ||||
| TeamSpeak | Linux, Windows, macOS, FreeBSD, Android, iOS | CELT, Speex, Opus | 32 unlicensed, 512 with Non-Profit License, up to 1024, 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 | 3.5.2; | ||||
| TeamTalk | Linux, Windows, macOS, Android, iOS, Raspbian | Opus, Speex, WebM | 1000 | Video, file sharing, desktop sharing, stream media files | 5.3.3; | ||||
| TeamViewer | Linux, Windows, macOS, iOS, Android | ||||||||
| Telephone | macOS 10.10.2 | SIP, STUN, ICE | Address Book integration | 1.1.4; | |||||
| Toktumi Unlimited, Line2 Pro | Windows XP-Vista-7, macOS, iOS, Android | Proprietary with SIP core | 20 | Conferencing, voicemail, caller ID, call-waiting, address book integration; auto-attendant, call-forwarding | Windows; ; macOS; | ||||
| Tox | Linux, macOS, Windows, Android, FreeBSD | Tox, VP8 | Opus, | Voice, video, instant messaging, file transfers | |||||
| Tru App | Windows 2000-XP-Vista-7, macOS, Linux iOS, Android, Symbian, BlackBerry OS, | SIP, XMPP | Chat, file transfer, voicemail, inbound numbers, integration with GTalk, Microsoft Live, Skype | ||||||
| Tuenti | Android, iPhone, Windows Phone | WebRTC, SIP, XMPP | iLBC, Opus | Yes | 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 | SIP | G.711 A-law μ-law, G.726, GSM, iLBC, Speex narrow wide ultrawide | 3 | Conferencing, chat, file transfer, Firefox integration, call redirection, voicemail, support of VoIP-to-Phone services | ||||
| Ventrilo | macOS, Windows, iOS, Android | 8 | Conferencing, chat, text-to-speech | 3.0.8 | |||||
| Viber | Linux, macOS, Windows, Android, Bada, BlackBerry OS, iOS, Series 40, Symbian, Windows Phone | Varies by platform: Text, picture and video messaging on all, voice calling only on iPhone, Android and Microsoft's Windows Phone | |||||||
| Vonage | Linux, macOS, Windows, Android, iOS | not free | SIP, STUN, ICE, TURN | Audio: Opus, G.711 Video: VP8 | SRTP | 50 | VoIP, video, instant messaging, presence, PSTN, call waiting, call hold, call forwarding, voicemail, message-waiting indication, 3-way conferencing, contacts integration, receptionist console, video, group chat, content sharing, SMS over IP services, native and social network contacts integration, incoming call/IM push notifications, fax, file sharing, screen sharing, number programmability. | - | |
| Wire | Linux, Windows, macOS, iOS, Android, Web | not free | Audio: Opus Video: VP8 | 10 | 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, timed messages, doodling, identity verification, screen sharing | ||||
| X-Lite | macOS, Windows | SIP, STUN, ICE, TURN | H.263, H.263+, G.711, iLBC, Speex | 3 | VoIP over WiFi, 3G, 4G, video, instant messaging, presence, call waiting, call hold, call forwarding, voice mail, message waiting indication, 3 way conferencing, contacts integration, background noise reduction, automatic gain control | 5.3.3 | |||
| Yahoo! Messenger | Classic Mac OS, macOS, Windows, | SIP and RTP | Video, file transfer, PC to phone, phone to PC | Windows: 11.5.0.228; Mac: 3.0.1; Linux: 1.0.6; SunOS 5.7: 0.99.17-1; Solaris 8: 1.0.4; FreeBSD 4-5: 1.0.4; iOS: 2.2.6; | |||||
| Yate Client | Linux, macOS, Windows | SIP, IAX, XMPP, H.323 | G.711a, G.711u, GSM 06.10, iLBC, Speex, G.723, G.726, G.728, G.729 | 6.0.0; | |||||
| Zfone | Linux, macOS, Windows | SIP, RTP | Beta 2008-09-04,, |
Discontinued softphone service
Mobile phones
For mobile VoIP clients:| Program | Operating systems | License | Open source | Protocols | Codecs | Encryption | Other abilities | Latest release |
| Acrobits Softphone | Android v2.2+, iOS v7.0+ | SIP | G.711, G.722, iLBC, GSM, G.729 | VOIP over Wi-Fi or 3G iOS only: push notifications, video, number rewriting, address book matching, sms for betamax providers and pennytel | Acrobits Softphone: 3.20, 5.2 | |||
| CounterPath Corporation Bria | Android v4.4+, iOS v10+ | SIP | G.722 wideband, G.711a, G.711u, iLBC, G.729a, SILK, GSM, VP8, H.264, Opus | Voice and video calling, SIP and XMPP messaging support, group chat, file, image and document sharing, contact integration, incoming call/IM push notifications. | 5.3.4 | |||
| CSipSimple | Android | SIP | Opus, AMR-WB, G.722, iSAC, iLBC, Speex, Silk, Codec2, G.726, G711, AMR, GSM | 1.02.02 | ||||
| Google Duo | iOS, Android | , freeware | WebRTC | One-to-one voice and video calling. | ||||
| iCall Mobile | iOS v4.3+ | , freeware | SIP AIM ICQ XMPP, Facebook, Yahoo! Messenger, Windows Live | Speex, CELT, WebM | VoIP over Wi-Fi or 3G, SMS, voicemail | 2.0.1; | ||
| Jajah Mobile Web | Symbian, Windows Mobile | web based service, Call back, no download | ||||||
| JusTex by Juphoon | Android, iOS v5.1+ | SIP | PCMA, PCMU, G.722, iLBC, iSAC, Opus, H.264, VP8, H.263 | JusTex Softphone over Wi-Fi or 3G, HD voice and video call, Multiparty call, conference. | 3.0.1 ; ; 3.0 ; | |||
| Line | Android, iOS | |||||||
| Line2 | Android, iOS | , freeware | Proprietary with SIP core | Tri-mode calling, SMS over IP, visual voicemail, 20-person conference calls, auto-attendant, call-forwarding | 1.0.4 Android, 3.2.1 iOS | |||
| Media5-fone | iOS, Android | SIP | PCMA, PCMU, G.722*, iLBC, iSAC*, G.729* | TLS*, SRTP* | Wi-Fi and 3G/4G data, second call*, conference calls*, HD Voice, Bluetooth* | |||
| Signal by Signal Messenger | iOS, Android | WebRTC | Opus | End-to-end encryption by default for everything. CallKit and location privacy, one-to-one and group messaging, video calling, image/video sharing, timed messages, identity verification, screenshot blocking. Android only: SMS/MMS messaging, doodling, GIF sharing. | ||||
| Sipdroid | Android | SIP | Uses Wi-Fi, 3G or EDGE | 2.7 | ||||
| Tango by TangoME Inc. | iOS, Android, Microsoft Windows, macOS, Windows Phone | , freeware | VoIP, Wi-Fi out & in, SMS over IP, call-through & call-back, instant messaging, videoconferencing | |||||
| Truphone | Nokia-Symbian, iOS, Android, BlackBerry | , freeware | SIP | VoIP, Wi-Fi out & in, SMS over IP, call-through & call-back, connection management, provisioning | Symbian 4.0, iOS 1.11.1 | |||
| Vopium | Symbian, Java ME, Android, BlackBerry RIM, iOS, Windows Mobile 2003 SE and higher | , freeware | SIP, MSN, Skype, Yahoo, AOL, ICQ, Google Talk, Facebook & Twitter | GSM | Wi-Fi VoIP, GSM call-through, SMS over IP, least cost routing, synchronising-backup mobile contacts and calendar | 2.0 | ||
Android, BlackBerry, iOS, Symbian, Windows Phone | , freeware | VoIP and instant messaging over Wi-Fi or a data connection. | ||||||
| Windows Mobile 6 | Windows Mobile 6 Professional/Standard | SIP to publicly and non-publicly routable servers | Wi-Fi Mobile VoIP | 6.1 | ||||
| X-PRO for Pocket PC | Windows Mobile 2003 | SIP | Supported devices: AudioVox Maestro, Compaq/HP iPAQ: 365x, 37xx, 385x, 395x, hx4700, Dell Axim X51, X51v, Toshiba e550, e570. iPAQ 545x and Toshiba e7xx are not supported. | 2.2 | ||||
| Yuilop | Android, iOS , Windows Phone, BlackBerry OS | , freeware | XMPP, RTP | iLBC | VoIP over 3G-4G-LTE and Wi-fi, SMS, group chat, photo sharing, Location sharing, virtual phone numbers | |||
| Android V4.4+, iOS v10.0+ | , freeware | SIP | iLBC | HD VoIP Call, Instant Messaging, Conferencing, SRTP Secure Media, Presence information | iOS 2.7.9 Android 2.7.12 |
Frameworks and libraries
Server software
Secure VoIP software
VoIP software with client-to-client encryption
The following table is an overview of those VoIP clients which provide end-to-end encryption.VoIP software with client-to-server encryption
The following table is an overview of those VoIP clients which provide client-to-server encryption.| Client name | Encryption protocols |
| Google Hangouts | |
| Skype |
;Notes