Software Alternatives, Accelerators & Startups


OnSIP offers cloud phone sytem for business communications across all devices.

OnSIP Alternatives

The best OnSIP alternatives based on verified products, community votes, reviews and other factors.
Filter: 6 Open-Source Alternatives Latest update:

  1. VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

    Try for free paid Free Trial $4.99 / Monthly (User)

    Try for free
  2. 20

    BVoIP allows to easily add Cloud & On-Premise VoIP PBX to the product offering without having to re-invent the wheel or add another layer to the daily operations..

  3. 21

    Windstream Holdings is a scalable cloud-based business phone solution that provides complete and unified communication applications to businesses of all sizes.

  4. 21

    Cebod Telecom is a flexible, cost-effective VoIP business phone service solution used by various businesses and industries such as real estate, healthcare, tax office and marketing etc.

  5. 20

    Loop Communications provides hosted VoIP business phone systems to small businesses and mid-sized companies.

  6. 19

    Allworx Verge is a world’s most leading business VoIP communication solution specially designed to power today’s workforce.

  7. 18

    Fonality is a leading business communications software that adapts to your changing needs.

  8. 20

    Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs

  9. 20

    Vonage is a cloud-based all-in-one VoIP software solution designed for multiple industries such as accounting, healthcare, finance and marketing etc.

  10. 12

    The European VoIP Provider with a Global reach. Numbers in over 165 countries, call anywhere. All numbers types.

    paid Free Trial £0.2 / Monthly (Part of a SIP Trunk)

  11. 16

    Windstream is a cloud-based business phone system that delivers complete and unified communication applications to the business of all sizes.

  12. 16

    Jive PBX is a communication solution that offers remote communication services to companies such as video conferencing, text, and chat services.

  13. 17

    Evolve IP is a unified communication platform that provides voice services and business collaboration tools for video, chat, screen sharing and web conferencing.

  14. 15

    Sonetel is a communication app that lets you make an international business call at the cost of local calls.

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