Best free SoftPhone for Mac. Ok, the interface is not Mac-like, in fact a bit ugly but that doesn't matter. ISoftPhone is buggy and laggy, Zoiper is just a little but still buggy. X-Lite works well and that's it for me. ``Solid Softphone for SIP calls`` The largest benefit to this software is convenience and cost effectiveness. Bria is compatible with many third party applications and most SIP providers will offer configuration support. The combined softphone and USB headset cost is much less than a VOIP phone / headset combo and has no desktop footprint. Free VoIP Server for Windows OS. The Mizu SIP softswitch is available for free -no limits. The Mizu compact VoIP server is the first free unlocked softswitch for the Windows platform with business features and a comfortable graphical user interface, with all the goodies from the commercial softswitch edition. X-lite was alright too, but I outgrew it’s limitations. Other than a couple codec limitations their basic functionality is similar enough that I’d recommend both. We use Skype for Business at work, it’s meh but does the job. I know Avaya also offers a SIP.

From VoIP.ms Wiki

A softphone is a software program for making telephone calls over the Internet using a general purpose computer, tablet or smartphone, rather than using dedicated hardware. Often a softphone is designed to behave like a traditional telephone, sometimes appearing as an image of a phone with a display panel and buttons with which the user can interact. A softphone is usually used with a headset connected to the sound card of the PC, or as an installed app on your phone. See also: Smartphone

Take a peek at VoIP.ms Blog Article : Back to Basics, What is a Softphone and How to Leverage It?

Acrobits

Product: Acrobits

Company:Acrobits

OS: IOS, Android

Overview: Acrobits is a mobile software development company with a focus on SIP Clients for mobile devices; their SIP client, Acrobits Softphone, is the leading app of it's type on the iTunes App Store.

Bria Mobile

Product: Bria Mobile

Company:CounterPath

OS: Windows, MacOS, Linux (Ubuntu), iOS, Android

Overview: Bria 5 is a carrier-grade next generation softphone application that enables you to manage your communications easily and efficiently – all from your computer desktop. Replacing or complementing your hard phone, the Bria softphone allows you to make VoIP and Video calls over IP, see when your contacts are available, send Instant Messages and transfer files with ease and efficiency.

Bria Mobile for Andoid and IOS is a highly secure, standards-based mobile VoIP softphone that works over both 3G and Wi-Fi networks.

Using the device’s existing contact list, Bria Android Edition facilitates easy and effective communication management with an intuitive interface. Deskphone-class calling functionality includes the ability to swap between two calls, merge calls and perform attended and unattended transfers.

Bria Teams

Product:Bria Teams

Company:CounterPath

OS: Windows, MacOS, iOS, Android

Overview: Team Communication made EasyBria Teams helps you regain productivity by streamlining all team communications into one application across your devices. With Bria's provisioning, it's easy to get your team talking.

It offers a softphone that helps you gain productivity by streamlining all team communications into one application. It has all the tools you need in one interface, across your devices and can be managed by one simple dashboard.

Dialer+

Product: cd26

Company: cd26

OS: IOS

Overview: Dialer+ is a SIP-based softphone for iPhone , iPod touch and iPad

Standard Phone Features

• Fast Contact Search – Use phone pad to find contacts by names, initials or any part of the numbers.

• iOS 4.0+ Background Support• Supports GSM calls when the network is unavailable or slowly• Multiple Account Support• Auto switch to best service provider when use multiple account• Pre-configured VoIP providers list• Call display• Speakerphone, Mute and Hold• Call history• Contact List and Contact Favorites - leveraging the iPhone Contacts• Ringtones and contact avatars• Multiple incoming Call Support - swap between two active calls; merge and split calls• Audio codecs include G.711,G.722, iLBC ,Speex and GSM, Make an in app purchase to add G.729 for great performance over 3G networks• Support for RFC 2833 DTMF• VPN Support• uPNP Support• iPhone 4 Retina Display Support

See Configuration Details

Ekiga

Product: Ekiga

Company: Ekiga

OS: Windows, Linux

Overview:Ekiga is a software phone and video conferencing application. It allows you to hear and see your friends for free using your computer and Internet. You can also chat with them and see if they are online or not. It works on GNU/Linux and Windows.

More specifically, Ekiga is a VoIP, IP Telephony, and Video Conferencing application that allows you to make audio and video calls to remote users with SIP or H.323 compatible hardware and software.

It supports many audio and video codecs and all modern VoIP features for both SIP and H.323. Ekiga is the first Open Source application to support both H.323 and SIP, as well as audio and video. Ekiga was formerly known as GnomeMeeting.

Express Talk

Product: Express Talk

Company: NCH Software

OS: Windows, MacOS

Overview: Express Talk works like a telephone to let you make calls through your computer. Call anyone via the internet who also has a softphone installed and if you sign up with a VoIP gateway service company you call regular telephone numbers as well.

With Express Talk you could potentially call someone using their internet IP (eg. 'bob@1.2.3.4') but this is not usually practical. It is much easier to use a friendly address like 'bob@myphoneco.com'. To have this you need to sign up with a SIP proxy service. This is almost always free to signup for and usually requires nothing more than an email address. See our Recommended SIP Service Providers List for a list of options.

Some of the companies also provide gateway services. This means connecting phone calls to ordinary (non internet or analog PSTN) phone lines. These calls tend to be much less expensive particularly for international calls compared to regular long distance charges since they can offer local call rates.

FgVoIP

Product: FgVoIP

Company: FG Microtec

OS: BlackberryOS

Overview: fg's BlackBerry SIP VoIP Client is a feature rich soft phone application for BlackBerry devices. It can register to any SIP VoIP provider or IP/SIP capable PBX using a WiFi connection in office, campus, home, hotel rooms, public hot-spots etc.

Its much like having a BlackBerry desktop phone in your pocket, providing significantly higher overall productivity while at the same time lowering telephony costs.

Experience the freedom of choosing your own VoIP provider whenever you want, wherever you want. All you need is a WiFi network and a VoIP account.

See Configuration Details

Fring

Product: Fring

Company: Fring

OS: Windows, MacOS, IOS, Linux, Android, Symbian

Overview: Fring mobile communication service that gives users internet-rich communication from their mobile phones.

Fring members make FREE video calls, voice calls, live chat to other fringsters and to friends on other social networks.

You can now use your SIP account even from non-SIP enabled phones.

Choose whichever SIP provider you have and in just few clicks, start using this account to make calls to landlines, GSM phones, or to other SIP providers.

Supports Symbian S60, iPhone/ iPod touch, Android, Windows Mobile, MeeGo, Linux, J2MEand proprietary OS.

Fring allows you to easily switch between them, without having to reconfigure your handset through a nightmarish process.

Grandstream Wave

Product: Grandstream Wave

Company: Grandstream

OS: Android & iOS

Overview: Grandstream Wave is a FREE softphone application that allows users to make and receive voice calls through their business or residential SIP accounts on any Android™ device (version 4.0+) from anywhere in the world.

This application supports integration of up to 6 SIP accounts, 6-way voice conferencing, and allows users to monitor their PBX (such as Grandstream's UCM6100 series IP PBX & UCM6510 IP PBX) while utilizing speed dial with up to 24 virtual BLF keys.

Grandstream Wave also supports advanced SIP telephony features including call transfer, LDAP phonebook integration and more.

Jitsi

Product: Jitsi

Company: Jitsi

OS: Windows, MacOS, Linux

Overview: Jitsi (formerly SIP Communicator) is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, AIM/ICQ, Windows Live, Yahoo! and many other useful features.

Jitsi is an Open Source / Free Software, and is available under the terms of the LGPL.

Kiax

Product: Kiax

Company: Kiax

OS: Windows, MacOS, Linux

Overview: Kiax is a softphone (soft phone, VoIP client) with a simple and comfortable user interface for making VoIP calls to Asterisk PBX. It depends on the iaxclient library to use Asterisk's IAX2 protocol for easy call configuration and audio setup.

See Configuration Details

Linphone

Product: Linphone

Company: Linphone

OS: Windows, Linux, MacOSX, IPhone, Android.

App Storage Consumption: 8.09mb (ability to move app to SD card. Data uses an additional ~0.89mb approx.)

Overview: Linphone is an internet phone or Voice Over IP phone (VoIP). With linphone you can communicate freely with people over the internet, with voice, video, and text instant messaging. Linphone makes use of the SIP protocol, an open standard for internet telephony. You can use Linphone with any SIP VoIP operator.

Free Sip Client Macos

See Configuration Details for PC
See Configuration Details for iOS
See Configuration Details for Android

NetDial Sip Phone

Product: NetDial Sip Phone

Company: NeoMecca

OS: iOS, Android.

Media5-fone

Product: Media5-fone

Company: Media5 Corporation

OS: Android, iOS

Overview: The Media5-fone is a softphone application that runs on the Android and the iOS Operating System. It is a SIP Client (softphone) that enables users to make and receive VoIP calls, enabling them to use their devices as an IP-PBX phone extension in their office or anywhere else in the world.

MicroSIP

Product: MicroSIP

Company: MicroSIP

OS: Windows XP/Vista/7/8/8.1/10, Linux, macOS

Overview: MicroSIP is a softphone that works on Windows Operating Systems. It is a SIP Client (softphone) that enables users to make and receive VoIP calls, enabling them to use their devices as an IP-PBX phone extension in their office or anywhere else in the world as well as being really easy to configure.

MizuPhone

Product: MizuPhone

Company: Mizutech

OS: Windows

Overview: Mizu SoftPhone is our award winner professional VoIP client application based on the open standard SIP protocol with an easy to use modern interface. With Mizu SoftPhone you can connect to any SIP server on the public internet or on your local area network.

Multiple accounts and multiple SIP server registrations combined with a powerful dial plan can minimize your telecom bills while using the greatest features from the VoIP industry.

Features include built-in encryption, IM, presence, HD Video, history with voice records, skype like voice quality using ultra-wideband codecs and much more.

A free edition is also available based on the same engine as our corporate sip softphone but it has some features disabled (like G.729 and wideband codecs, multiple accounts and file transfer over SIP).

See Configuration Details

NinjaLite

Product: NinjaLite

Company: Global IP Telecommunications

OS: Windows

Overview: Ninja Lite offers Audio- and video telephony for everybody, Ninja features individual skins and ringtones!, Ninja is natively Vista 32bit /64 bit and Windows7 compatible.

See Configuration Details

PhonerLite

Product: PhonerLite

Company: PhonerLite

OS: Windows

Overview: PhonerLite is a clearly arranged application for Windows. PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP ). Pre-conditions are a full-duplex sound card , a microphone and speakers (alternativelya headset), an internet connection and a registration at a provider supporting the protocol SIP .PhonerLite supports several SIP profiles, each configurable independently. In thesame way the integrated phone book and call log are easy to use.

PortGo

Product: PortGo

Company: PortSIP Solutions, Inc

OS: Windows (desktop and mobile)

Overview: PortGo is the newest SIP softphone from PortSIP, it's built base on PortSIP VoIP SDK, allowing users to enjoy multimedia communications in a dynamic way.

Featuring an intuitive interface, PortGo is expanding the softphone experience by making it even easier to make VoIP and Video over IP calls, see when your contacts are available and send Instant Messages. PortGo features an IM interface which focuses on your contacts and friends.

QuteCom

Product: QuteCom

Company: QuteCom

OS: Windows,MacOS,Linux

Overview: QuteCom is a community of enthusiasts and developers, creating free software products related to communication over IP. The flagship product of the QuteCom project is a softphone which allows you to make free PC to PC video and voice calls, and to integrate all your IM contacts in one place.

SIP Droid

Product: SIP Droid

Company: SIP Droid

OS: Android

App Storage Consumption: 1.85mb (ability to move app to SD card. Data uses an additional ~4kb approx.)

Overview: SIPDroid is a java based, open source SIP client that has recently been developed for use with mobile devices based on Google’s Android platform.

SJPhone

Product: SJPhone

Company: SJ Labs, Inc.

OS: Windows,Windows Mobile

Overview: SJphone is a VOIP softphone that allows you to speak with any other softphone, any stand-alone IP-phone, or using ITSP with any traditional wired or mobile phone.

It supports both SIP and H.323 standards and is fully inter-operable with most major VOIP vendors and ITSP.

Taki

Product: Taki

Company: Taki

OS: BlackBerry 10, BlackBerry PlayBook

Project site:http://taki.sourceforge.net/

App in the AppWorld:http://appworld.blackberry.com/webstore/content/130295

Overview: Taki is a native SIP softphone for BlackBerry® PlayBook™ andBlackBerry® 10 platforms.

Main Features:- Multiple SIP accounts support- Multiple simultaneous calls- Call recording- Conference calls- Advanced call control: Transfer, Hold, Mute, Reject, Redial, switchbetween multiple active calls- Speaker phone support- Address book. Integration with local contacts on BlackBerry 10 phones- Comprehensive SIP settings (port binding, outbound proxy, registrar,codecs priority, NAT traversal, STUN, Presence, and more)- Transports: UDP/TCP- Audio codecs: G.711a/u, GSM, iLBC, G.722 (HD), Speex (NB, WB, UWB)- Built for BlackBerry

Telephone

Free Sip Phone Mac

Product: Telephone

Company: 64 Characters

OS: OS X 10.9 or later

Project site:http://www.64characters.com/telephone/

Mac App Store:https://itunes.apple.com/us/app/telephone/id406825478

Overview: Telephone is a fully-featured SIP client with a minimalist user interface.

Main Features:

• Multiple SIP accounts
• Multiple simultaneous calls w/conferencing
• Call control: Transfer, Hold, Mute, Reject, Redial, Call Waiting, multiple active calls
• Speaker phone/headset support (via Mac sound device)
• Integration with Contacts app, dial by name, autocomplete, click to dial
• Send DTMF tones
• Languages: English, German, Russian

X-Lite

Product: X-Lite

Company: CounterPath

OS: Windows, MacOS, Linux

Overview: CounterPath's X-Lite helps you seamlessly transition from a traditional phone environment into the world of Voice over IP.

The latest release of X-Lite provides a completely redesigned interface that allows for a contact-centric or dialpad-centric user experience, or a combination of the two. It also provides you with some of the most popular features of our fully loaded Bria and eyeBeam softphones so you can take them for a test drive before you make your purchase.

Having a simple voice conversation, you’ll soon see why having a softphone on your desktop or laptop is the ultimate communications experience.

ZoiPer

Product: ZoiPer

Company: ZoiPer

OS: Windows, Mac OS, Android, iOS

Overview: IAX & SIP multilanguage softphone is a VoIP soft client, meant to work with any IP-based communications systems and infrastructure.

Zoiper is available for Windows, Mac OS X and Linux and supports the following languages: English, German, Spanish, French, Dutch, Portuguese, Russian, Chinese, Japanese, Italian, Polish, Magyar.

• See Configuration Details for Zoiper Classic for PC/MAC
  
• See Configuration Details for ZoiPer 5 for PC/MAC
  
• See Configuration Details for android
  
• See Configuration Details for iOS
  

ZoiPer Communicator

Product: Zoiper Communicator

Company: Zoiper

OS: Windows, MacOS, Linux, Solaris

Overview: Zoiper Communicator IAX & SIP softphone is a converged Internet communication tool combining high-quality voice and video calls, fax, instant messaging and presence through a contact-centric intuitive interface.