Best Business VoIP Providers for SIP.US

Find and compare the best Business VoIP providers for SIP.US in 2026

Use the comparison tool below to compare the top Business VoIP providers for SIP.US on the market. You can filter results by user reviews, pricing, features, platform, region, support options, integrations, and more.

  • 1
    3CX Reviews
    Top Pick

    3CX

    3CX

    Free for up to 10 users
    1,234 Ratings
    See Provider
    Learn More
    3CX is an open-standards, software-based IP PBX that provides complete Unified Communications right out of the box. 3CX is suitable for all industries and sizes. It can provide everything you need, from mobility and status to advanced call center features and more, at a fraction the cost. 3CX is ideal for remote companies and includes mobile apps, video conference, and website live chat. The installation, management, and maintenance of the PBX are so simple that you can easily manage it yourself, on your own appliance, server, or on a cloud-based platform. You can also choose to have it hosted on 3CX for an easy solution.
  • 2
    Yeastar Cloud PBX Reviews
    Yeastar CloudPBX is a future-ready phone system that is ideal for small businesses. Linkus UC Clients will give you easy access to remote working and enhanced call efficiency on any device. Hosted deployment is free of upfront hardware costs and virtually eliminates overheads for management. Yeastar's hosted solution is easy to use and has full compatibility features. Any migration or upgrade will be seamless. * Please note that Yeastar P-Series PBX System is the new Yeastar Cloud PBX that comes with versatile call center features and unified communications features.
  • 3
    Vodia PBX Reviews
    Vodia is a software-based PBX that runs on Windows and Linux. It offers all the advanced features you would expect from a full-featured PBX, including call queues, auto attendants and call forwarding. Vodia is also the pioneer in Multi-Tenancy. You can host Vodia on a dedicated VM( Virtual Machine) in the cloud, premises, and maintain multiple FQDNs for each customer. Sign up for a hosted demo license code for 60 days.
  • 4
    MiCloud Connect Reviews
    MiCloud Connect offers a user-friendly, comprehensive solution for cloud communications, collaboration, and contact center needs. It merges a straightforward user interface with the trusted dependability of Google Cloud, ensuring that every feature is both simple and secure. With Google Cloud's top-notch reliability, security, and scalability, users can count on consistent uptime along with SOC 2 and HIPAA compliance. The modern and intuitive design allows both end users and administrators to swiftly complete tasks through single-click options, a smooth cross-device experience, and real-time management capabilities. Transitioning to this service is made seamless with clearly defined expectations and timelines, allowing for a quick and assured switch. Administrators find it straightforward to enhance functionality and adjust permissions instantly through the admin portal. Its robust PBX capabilities, sophisticated call management, and versatile communication options—including softphone, mobile, and IP desk phones—empower users to communicate and collaborate effortlessly from anywhere. Ultimately, MiCloud Connect redefines how teams interact in a dynamic work environment.
  • 5
    Avaya IP Office Reviews
    Our award-winning Avaya IP Office, accessible worldwide, provides a comprehensive unified communications platform that is both implemented and managed on-site. To enhance the interactions and experiences of both your customers and employees, delve into the extensive capabilities available with IP Office. You can analyze customer calls effectively by utilizing features such as call recording, tracking, and reporting. With the Avaya Call Reporting functionality integrated into IP Office, you can capture and document incoming calls seamlessly. Furthermore, you have the option to incorporate real-time call center agent seats and dashboards to optimize call management processes. When you pair Avaya IP Office with a subscription to Avaya Spaces, you unlock a versatile application that encompasses voice, video, messaging, conferencing, and calendar functionalities, all of which are accessible from any device and location. This integration not only streamlines communication but also enhances overall productivity across your organization.
  • 6
    Switchvox Reviews

    Switchvox

    Sangoma

    $12.99 per month
    Switchvox is tailored for businesses similar to yours, offering enterprise-level features, a comprehensive pricing structure, and a design that has garnered awards, making it more than just another VoIP system for business phones. It provides a smart approach for your organization to leverage Unified Communications (UC) and collaboration tools at a reasonable cost. With functionalities such as chat, video conferencing, quick dialing, status updates, presence indicators, and customizable call rules, your team and clients can communicate more effectively. Switchvox stands out as a highly adaptable and scalable UC platform. It features smooth integration with IP phones, SIP trunks, and PSTN connections, as well as various collaboration and productivity capabilities, allowing you to choose from multiple deployment options. In educational environments, effective communication is crucial, and Switchvox delivers an accessible, user-friendly solution that goes beyond a standard phone system that merely handles calls. This platform ensures that schools can maintain seamless interactions and foster an engaging learning atmosphere.
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