Use Free SIP Accounts to Make Free Internet Calls

Use a SIP account with smartphone software or an app

Free SIP Account
Busakorn Pongparnit / Getty Images

Session Initiation Protocol (SIP) is used in Voice Over Internet Protocol (VoIP) communications. It allows users to make mostly free voice and video calls over the internet. Having a free SIP account is a great way to make free calls. You begin by choosing a SIP provider that assigns you a SIP account at no charge. Use it with softphone software, an app, or a VoIP-compatible phone.

OnSIP is a paid VoIP service offered by Junction Networks. However, the company also offers the OnSIP Free Plan to people who want to create a free SIP address. The OnSIP Free Plan provides a web-based voice, video, and messaging solution for teams. ​The features include:

  • Up to 100 users
  • Free SIP-to-SIP calling
  • Custom web call links and HTML buttons
  • Integrates with Slack and Zendesk
  • Google Chrome extension 

The OnSIP Free Plan replaces the company's GetOnSIP program. More »

02
of 05

IPTel.org provides IP telecommunications services and hosts several projects like the SIP Express Router, SIP Express Media Server, and the SIP Express Router Web. IPTel also provides a wealth of information on SIP communications on its website. The free SIP account IPTel offers is of good quality and is available with only a straightforward registration.

You are assigned a lifetime SIP account you can use to make audio and video calls with users of IPTel.org and other domains. You can access VoIP telephony services through web browsers without needing any special equipment, a SIP-compliant phone, softphone, or a smartphone app. 

  More »

03
of 05

Ekiga.net is a VoIP service that offers a softphone program and free VoIP service. It is known for its Linux VoIP app. Ekiga also offers free SIP addresses that you can use with any SIP-supporting softphone application. To call users at another service, you dial a prefix assigned to that service. The prefixes are listed on the Sip Broker White Pages prefix page.

The service assigns an address you can use to make and receive calls. The webpage contains tests you can use to try out your softphone with the service and to ascertain if your number is reachable worldwide. More »

04
of 05

SIP2SIP is a straightforward SIP service offered by AG Projects. It is a free SIP service based on fair-use policy. Registration and account management are easy. AG Projects offers this free SIP service as one way for users to test the features present in its products. Using any of the compatible apps or clients you can:

More »
05
of 05

The Antisip service offers a set of SIP-based services. Among them is a free SIP account that provides VoIP-to-VoIP services. The company recommends downloading its Antisip app for Android mobile devices, but the SIP account works with other devices. 

Links to YouTube tutorials are available at the website for users who are new to the SIP experience. More »