Best VoIP Softphone for iPhone Users

iPhone Softphone

It can be difficult to choose the best softphone for iPhone users, especially with the wide variety of softphones available today. After doing some research, we found there are a number of options on the market that can fit many of your business needs. In the past, we've noted that the VoIP softphone offered in the AVOXI Genius platform is our top web-phone for desktop performance, but what about for mobile-users? To help make your decision a little easier, we downloaded a variety of apps, tested them and compiled a list of the best iOS SIP client applications.

Best SIP Client for iPhone

Bria 5

The Bria 5 is a next generation softphone that allows you to manage your communication needs efficiently, no matter where you are.  It allows you to make VoIP and video calls over IP, see when your contacts are available, send instant messages, and easily transfer files.

Bria's 5 release offers new features, such as a multiple license key capability that allows retail users to further enhance their communication software with add-ins and services like screen sharing and an integration for Outlook.

The Bria iPhone Edition, a SIP-based phone designed with the needs of iPhone or iPod touch users in mind, makes and receives calls using a Wi-Fi or data network connection.  Drawing on your existing iPhone or iPod contact list, you can manage communication through the Bria iPhone Edition's user-friendly interface.  Additional features include the capability to merge and split calls, complete attended and unattended transfers, and more.

Bria's iPhone Edition also includes features designed specifically for business and enterprise users, like audio encryption and secure call signaling.



  • Attractive, user-friendly interface
  • Stong feature set
  • Great for video conferencing
  • iOS and Andriod app available
  • Easy and efficient software
  • Zero battery life impact
  • Graphical settings - customize the product name to match your brand


  • Expensive - must purchase a monthly subscription to maintain service
  • VoIP app requires a lot of memory, recommended 2 GB


ZoiPer is another popular VoIP softphone for iPhone users. Available for both SIP and IAZ systems, ZoiPer is a reliable option for service providers, call centers or any business looking to benefit from VoIP communications.  Unlike some of the other softphones on this list, ZoiPer allows you to integrate with the provider of your choice, or even a combination of providers.

The ZoiPer VoIP softphone is great for handling contacts and integrates well with mail clients such as Outlook, Thunderbird and Lotus Organizer.  Its multi-tabbed interface allows you to view all call logs and effortlessly change statuses to away or be right back.  By clicking the Contacts tab, you can manually add contacts from another source, or find contacts that are already available.

best softphone for iphone


  • Video calls are effective
  • Manages all contacts well
  • Integrates well with various mail clients
  • Customize to match your brand


  • Some reviews state the new app version crashes on opening.
  • We received an error when configuring setup: 63, network unavailable. This error means that the non-ZoiPer service contact you are trying to reach is offline, or they are using an unsupported PBX server.


Sessiontalk offers a free to download iPhone VoIP client, with a good feature set included in their product. While they do not offer a lot on their website, their app in the App Store carries decent ratings. One thing they note on their website is their app won't drain your battery like some SIP apps tend to do, and will send you a push notification when someone is calling in and your application is closed. Some of their features include:

  • CallKit Support
  • Push notifications
  • Call recording
  • Video calls
  • SMS messaging
  • Call conferencing

best sip app iphone


  • Free mobile app
  • Call recording included
  • Good video conferencing feature


  • Calls can be dropped periodically
  • Calls may be limited unless you upgrade your plan
  • May not be available in all countries


Another great choice is the 3CX Phone app, which has been recognized for its sleek and user-friendly design, as shown above. 3CX is available for mobile platforms, including iOS and Android, as well as desk top platforms, such as Windows and Mac OS.

If you are looking for more than just a softphone, this is a great option.  3CX can be used as a PBX office phone system for businesses, and it's very easy to install. 3CX also provides many of the standard VoIP features such as call recording, blind transfers and call forwarding.

best ios sip client


  • Sleek and user-friendly interface
  • Can be used as a PBX office phone system


  • Some users experienced crashing

Whether you're searching for the right softphone client for personal use, or to meet the unique needs of your business, there are a wide variety of VoIP softphones available for iPhone users. We hope this overview will be a helpful guide as you search for the right option for your business.