Best SIP Trunk Providers for Microsoft Teams

Find and compare the best SIP Trunk providers for Microsoft Teams in 2025

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

  • 1
    Squaretalk Reviews
    Top Pick

    Squaretalk

    $15/month/user
    184 Ratings
    Top Pick See Provider
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    Communication is made possible by flexibility. Squaretalk connects 100's leading business applications, creating unique hubs for call centers around the world. Built to integrate. Cloud contact center that combines speed, flexibility, and ease of integration. Predictive dialer technology which feeds and improves contact center efficiency. Interact. Interact with leads from any device or app. Automate. Create and deploy custom workflows in an interactive workshop. Remote and physical workplaces. Our vision and culture have always been about flexibility and the ability to work from anywhere. This was proven by the Covid-19 pandemic. It has also shown that even when working remotely, we must ensure that individuals and teams can deploy quickly in a distributed, localized environment.
  • 2
    Zadarma Reviews
    Top Pick
    Business Phone system that doesn't require heavy wiring or hardware. Zadarma offers VoIP and Cloud PBX, CRM, website widgets and integration with top CRM systems. Virtual phone numbers in 100 countries around the globe are available for as low as $2 per month.
  • 3
    XCastLabs Reviews
    Top Pick
    Our proprietary technology has been providing telecom services since more than 20 years. We are experts in Hosted IP-PBX and SIP Trunks, Call Center Software, Wholesale, Data Services, etc. Our exceptional service, rates, and products meet the FCC standards for STIR/SHAKEN network compliance. The XCast Unified Communications is Scalable and International with unlimited, free, planet-wide, extension-to-extension, all with a web-based Administrator Control Panel (ACP) to help you manage all your features. Promotional plans: Hosted PBX Basic - $9.95/month Sip Trunking Basic - $4.95/month
  • 4
    IntelePeer Reviews
    IntelePeer’s Communications Automation Platform (CAP) offers a cloud-based solution tailored to streamline customer interactions and elevate user experiences. This platform integrates seamlessly with enterprise applications, enabling businesses to enhance efficiency, reduce operational costs, and automate communications across multiple channels like voice, SMS, and social messaging. Leveraging generative AI, CAP supports omnichannel communication and adapts to on-premises, cloud, or hybrid infrastructures, making it a flexible choice for modernizing organizational workflows. With robust enterprise-grade security and compliance features, IntelePeer ensures the protection of sensitive data while empowering organizations to optimize their communication strategies.
  • 5
    Operator Connect for Microsoft Teams Reviews
    Intrado's Operator Connect Connect, an official Microsoft direct routing partner is a Microsoft Teams certified phone system. You can chat, call, and even hold meetings all from one place. Operator Connect offers an affordable alternative to Microsoft calling plans if you need commercial flexibility and service in areas that are not covered by Microsoft. You can bring your own SIP solution to expand international coverage. Intrado's cloud first delivery allows you to eliminate local gateways and avoid expensive PRI circuits. This will ensure maximum uptime and reduce the cost of local gateways. Intrado can support all services and integrate with your existing carriers partners or PBX. No need for new hardware. We also offer licensing for Microsoft Teams and Microsoft 365. Find out what you can do with these two popular business solutions. Communication solutions work together better. To simplify your business, consider an all-in one communication suite. It will allow you to use one provider for all aspects of calling, collaboration, and contact center.
  • 6
    DIDforSale Reviews

    DIDforSale

    DIDforSale

    $0.0025 per minute
    DIDforSale, a California-based telecom carrier, offers a wide range of services. Services include SIP trunking and local DIDs as well as toll-free numbers. Outbound termination is also available, along with an API and network services like E911, CNAM Lookup and local number portability. DIDforSale, with its 10+ years' experience, has proven to a be a leading wholesale VoIP termination and origination provider. Our network is optimized for call drops, lags and echoes. We work with top-notch service providers in the US as well as around the world to provide you with crystal clear calls. The USA has the largest selection of local phone numbers. Bulk SMS marketing can maximize impact and reduce effort. Increase professionalism and credibility while increasing reach and engagement. You can now send and receive texts programmatically. Boost your brand, increase recall and gain a competitive advantage.
  • 7
    Gamma Reviews
    All business sizes can benefit from voice, mobile, and connectivity products. Gamma runs a completely business-only network. The network was built from the ground up and allows us to deliver services more efficiently. It also offers high levels of automation and a governance framework that provides exceptional platform security and service continuity features. Gamma's award winning range of UC products can help you increase productivity, agility, and collaboration. We help you reduce operational complexity and costs while increasing employee engagement.
  • 8
    Bandwidth Reviews
    You want the best voice quality, messaging, and other features. You need an API provider that has its own network across the country to get them. You can eliminate the middleman, cut costs, gain more control, and create the application your customers want. This is not a new concept. However, you need a partner to help reach the scale you are capable of. Bandwidth can help you reach your full potential, whether you are bringing your own carrier to market or creating your own solution.
  • 9
    Alltel Reviews

    Alltel

    Alltel

    $10 per business hour
    Your business's lifeline is your incoming calls. Alltel's virtual and inbound services offer unmatched flexibility, credibility, and ensure that every call is professionally answered no matter what time it is. No matter where or how you work, you can stay connected with your clients. Our cloud communications technology enables seamless collaboration between your office phone system and your employees mobiles and remote working devices. Your business shouldn't have to settle with slow and unreliable internet. Get fast internet with enterprise-grade connectivity backed by the best network providers in the country. We offer internet and data solutions that can be used by any size business. Let us take the hassle out of managing your IT department. One of our certified partners can provide expert advice and the best-in-class technical support across a wide range of IT services.
  • 10
    Wavetel Reviews

    Wavetel

    Wavetel Business LTD

    $13 per month
    Wavetel was founded in 2010 and has since grown to be a major provider of telecom services in the UK, and around the globe. Wavetel began as a wholesale operator that offered Voice, SMS, and Data services to other operators. Wavetel's B2B services were launched in 2013 by the company. These include VoIP telephony services and Connectivity, Virtual Numbers. SIP Trunks. Microsoft Teams Direct Routing. Mobile, SMS, Call Center Solutions are available to its valued clients worldwide. Our voice messaging solutions have evolved over the years to be an enterprise solution. It can integrate with third-party CRMs and business apps through our programmable APIs.
  • 11
    Broadvoice Reviews
    Broadvoice simplifies communications for small- and medium-sized businesses (SMBs). It combines powerful cloud PBX and UC features with virtual call centers in one award-winning Unified Communications as a Service platform (UCaaS). This platform delivers enterprise-class features at reasonable rates. Broadvoice's redundant, secure network and hosting infrastructure connect the platform to enable SMBs to securely connect with customers from anywhere, anytime and with any device. Broadvoice is ranked among the Deloitte Technology Fast 500 as well as the Inc. 500 Fastest Growing Private Companies.
  • 12
    Coeo Reviews

    Coeo

    COEO Solutions

    PBX, also known as private branch exchange, is a private telephone network that companies and organizations use to maintain internal and external phone communication. It offers features such as voicemail, voice transfers, voice menus, and interactive voice menus. Cloud PBX services allow you to access all the features you want and need, but also offer many more. You get more mobility, security, and scalability that work for you now as well as in the future. We listen to your business and create solutions that meet those needs. We are the most transparent and customer-driven connectivity provider in our industry. Voice communications over the Internet are now possible thanks to new technologies. These technologies have lower costs, better reliability and scalability. We can help you move forward with the latest technology or with legacy or obsolete systems. Coeo bridges business connectivity and customer service. It provides seamless, high-quality connectivity that is industry-leading in security.
  • 13
    IPFone Reviews
    IPFone, a telecommunications provider, offers cloud communication, internet access and business phone systems to small and medium businesses. IPFone offers a range of services, including: UCaaS VoIP SD-WAN Contact center Fiber internet On-site installation In-depth training World-class customer support Unlimited international calling
  • 14
    RingLogix Reviews
    Stop accepting small commissions. RingLogix can help you achieve up to 70% in margins for your MSP. Create custom quotes quickly and let customers sign-up online with a few clicks. Activate customers and provision services automatically from any quote or add a la carte services on demand. The built-in billing system allows you to charge subscriptions and taxes, send invoices and collect payments. Direct access to call logs, including SIP ladders and caps, RTP statistics, and more. No need to change devices or buy new hardware. RingOS is compatible across all major vendors, and we are always open to new collaborations. All in one platform, you can quote, activate, bill and support your own services. {Your brand, your customer, our platform.|Your brand, your customers, our platform.} RingOS is an ideal white-labeling solution. {Control everything from packing and pricing to features and integrations.|Control everything, from packaging and pricing to features.}
  • 15
    Sewan Reviews
    Professionals need to communicate more than ever with each other and their customers. Our telephony solution can be adapted for everyone, whether they are in the office or out on the road. Business telephony has become more versatile. Sewan's products can be easily tailored to meet any need. Our solutions are based on voice technologies that guarantee the highest call quality. We understand that business requirements can change quickly. You can add or delete lines and import contacts in a blink of an eye. Our solutions are designed for cost-effectiveness, so there is nothing unnecessary. Our solutions are designed for the international market: All our packages can be tailored to different needs.
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