Try one, or try them all, they're free!
We frequently are asked by our customers who are in the process of installing or configuring a new PBX system, "which softphones do you recommend?." While we support most SIP-based softphones available on the market, we do tend to work with some vendors more than others.
Below is a list of the more popular SIP softphones, all of which are completely free download and use. Choosing the right softphone for your particular needs will depend on many factors, like which operating system you plan to use, what phone features you require, and what PBX system it will be connected to.
Have a look, download and play around with one or all of them to find the right softphone for your requirements.
Zoiper runs on a multitude of different platforms: Mac, Linux or Windows, iPhone and Android - with support for both SIP and IAX, and includes free and paid versions of their software.
CSipSimple is a SIP softphone for Google Android operating system using the Session Initiation Protocol (SIP). It is open source and free software released under the GNU General Public License.
Switchvox Softphone for Mobile
Switchvox Softphone app gives you all of the enterprise-class Unified Communications features you expect from Switchvox, now available on the go.
The 3CX softphone for Windows is a free softphone that you can use to make and receive VoIP phone calls from your PC. The advantage of using the 3CX softphone for Windows is that you can leverage low cost or free VoIP calls.
A very popular SIP softphone supporting a range of codecs and also offering great support for desktop business video conferencing