SIP Service Providers That Offer Free SIP Accounts

Use any of these SIP accounts to make free online calls

By
Nadeem Unuth
Nadeem Unuth
Contributor
  • University of Mauritius
Nadeem Unuth is a former contributor to Lifewire who specializes in information and communication technology with a focus on VoIP.
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Updated on November 6, 2024
Reviewed by
Michael Barton Heine Jr
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Reviewed by Michael Barton Heine Jr
    Michael Heine is a CompTIA-certified writer, editor, and Network Engineer with 25+ years' experience working in the television, defense, ISP, telecommunications, and education industries.
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    Person using voice call headset
    Using a voice call headset via VOIP/SIP.

    Alistair Berg / Getty Images
    Texting & Messaging

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

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    SIP2SIP

    SIP 2 SIP website
    What We Like

    • Free and easy to use.

    • Decent design.

    • Optimized for SylkServer.

    What We Don't Like

    • Consumer-facing usage doesn't seem to be the developer's priority.

    • Separate apps for video and audio.

    SIP2SIP is a straightforward SIP service offered by AG Projects. It is a free SIP service based on a 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:

    • Make audio and video calls.
    • Chat and transfer files.
    • Make conference calls.
    02
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    AntiSIP

    Antisip website
    What We Like

    • Pure SIP-to-SIP provider.

    • Good documentation.

    What We Don't Like

    • Clunky user interface.

    The Antisip service offers a set of SIP-based services. Among them is a free SIP account that provides VoIP-to-VoIP services. You'll want to download its Antisip app for Android mobile devices, as the web-based portal appears to be gone.

    Links to YouTube tutorials are available on the website for users who are new to the SIP experience.

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    of 03

    OnSIP Free Plan

    onsip website
    What We Like

    • Plan includes 100 users with unlimited extensions; great for teams.

    • Slack and Zendesk integrations.

    What We Don't Like

    • Application suite can be a bit difficult to navigate.

    • Still some documentation updating after the GetOnSIP migration to the OnSIP Free Plan.

    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.
    • Able to use as a Google Chrome extension.

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

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