Best Business VoIP Providers for Microsoft 365

Find and compare the best Business VoIP providers for Microsoft 365 in 2026

Use the comparison tool below to compare the top Business VoIP providers for Microsoft 365 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
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    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
    Dialpad Connect Reviews
    Top Pick

    Dialpad Connect

    Dialpad

    $15 user/month
    4,168 Ratings
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    Dialpad offers companies a contemporary Voice over Internet Protocol (VoIP) solution, eliminating the need for outdated landline systems through a comprehensive, internet-driven communication platform. This innovative service allows teams to engage in high-quality voice calls, exchange SMS and MMS messages, and maintain connectivity across any device, whether it’s a desktop or mobile. As a fully integrated communications platform, Dialpad also features seamless video conferencing, team chat capabilities, and artificial intelligence-enhanced productivity tools. Consequently, it provides a more adaptable and economical option compared to conventional phone systems, enabling businesses to connect with customers on their preferred channels.
  • 3
    Yeastar P-Series PBX System Reviews
    Top Pick
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    Emphasizing a user-friendly approach to Unified Communications, the Yeastar P-Series Phone System provides businesses of any scale with an all-in-one solution for voice calls, video conferencing, messaging, and seamless integrations right from the start.
  • 4
    NXTPulse Reviews

    NXTPulse

    NXTPulse

    $79.99 per month
    NXTPulse offers cutting-edge innovations that can elevate your business operations significantly. The platform is packed with a variety of features, including seamless integrations with Microsoft Teams, which enhance its functionality. With its extensive capabilities, NXTPulse empowers you to work flexibly from any location at any time. It is compatible with leading platforms such as Office 365 and numerous popular CRMs. Moreover, NXTPulse provides robust conference bridges, facilitating effective communication among all participants. You can rely on NXTPulse to manage your hosted voice solutions, freeing you from that responsibility. Regular updates and new features ensure that the platform remains current and effective. Strong SSL security safeguards the connection between your organization and the NXTPulse cloud, ensuring that your communications remain secure. In addition to its numerous productivity-boosting features designed to enhance customer service and operational efficiency. 3cx Integrations - AI, Microsoft Office 365, Google Workspace and more for a robust and flexible phone system tailored to your business needs. Inclusive Licensing - Benefit from included 3cx licenses, reducing additional costs. Scalable Solutions - Grow your business with scalable phone systems that adapt to your evolving needs. Fully Managed Solutions - Enjoy peace of mind with our fully managed services Amazon Web Services - Utilize the power of AWS for reliable and scalable hosting
  • 5
    Infinite Connect Reviews

    Infinite Connect

    Infinite Connect

    $22.50 per month
    All your business operations can be managed remotely from one platform. You can improve productivity and simplify communications with reliable voice and video, fax, messaging, conferencing, and fax in the cloud. Flexible, unified cloud communications and contact centre services for small and medium-sized businesses. You can customize your settings and capabilities to make your conference calls work as you wish. You can have up to 100 people on your conference call. Our VoIP phone system or hosted PBX replaces your traditional small business phone system. It uses your broadband connection to make communication easier. You can easily share your desktop and broadcast HD video to any size meeting, large or small, as well as teleconferencing. No downloads required. You can send and receive SMS and MMS text messages online. You can also manage internet faxing right from your dashboard. Infinite offers the most current VoIP phones that are fully configured and ready to use. You just need to turn on your phone and get started talking.
  • 6
    KrispCall Reviews
    Top Pick

    KrispCall

    KrispCall

    $15 per user per month
    74 Ratings
    KrispCall allows you to manage all your telephony needs, whether they are personal, business, or corporate, using one app (Web, Android and iOS). You can access international numbers from the comfort of your own home. KrispCall makes it easy to create international numbers for national, local, shortcode and toll-free numbers (for more than 100 countries) in no matter how fast you want. You can easily manage your call logs. KrispCall's unified phonebox allows you to manage and monitor all your business calls, voicemails, and recorded conversations from one place. Call your international clients through their local numbers to earn their trust. KrispCall offers international numbers for your business at an affordable price. Our embeddable widget makes it easy to reach your customers. Clients can now easily call you by clicking on the KrispCall widget embedded in their website.
  • 7
    Thirdlane Reviews
    Top Pick
    Thirdlane is built for service providers and MSPs who need a multi-tenant, white-label UCaaS platform with deep API control. It delivers voice, video, chat, and contact center features while giving providers the ability to integrate billing, CRM, and IT workflows with ease. Why providers choose Thirdlane: - True multi-tenant PBX architecture built for scaling to thousands of tenants. - White-label flexibility - deliver a branded experience to your customers. - Thirdlane Connect apps unify messaging, calling, and meetings across all devices. - Built-in Contact Center for sales and support teams. - CRM screen pops and Click-to-Call to boost productivity. - Extensive APIs for automation and third-party integrations. Business outcomes: - Launch branded UCaaS without the heavy R&D cost. - Increase recurring revenue with scalable multi-tenant architecture. - Offer enterprise-grade features at a competitive price point. Thirdlane empowers providers to own their UCaaS offerings end-to-end, increasing margins and ensuring long-term customer loyalty.
  • 8
    Zoom Phone Reviews
    Top Pick

    Zoom Phone

    Zoom Communications

    $14.99 per user per month
    22 Ratings
    The cloud phone solution is natively designed for the Zoom platform. Modern user interface and enterprise-class features to simplify voice communications. Zoom administrator portal allows you to manage and provision users, as well as monitor call quality and usage. Globally distributed Zoom cloud platform provides secure HD Voice with enterprise-class reliability. You can easily make and receive calls, share content and participate in video meetings. You can also send chat messages using Zoom desktop or mobile apps. You can easily elevate phone calls to Zoom Meetings without having to ask participants to hang up or dial in to a separate conference bridge. Native apps for Windows, MacOS and Android are easy to use and maximize voice and video quality. There is an ever-growing number of countries that provide local phone numbers. Customers who want to simplify global telephony carrier management can port numbers to Zoom.
  • 9
    GoTo Connect Reviews
    Top Pick
    GoTo Connect gives your business a professional boost. GoTo Connect is a cloud-based, feature-rich, business phone system that helps thousands of companies in all industries and sizes to improve their communications and achieve greater success. GoTo Connect Hosted VoIP provides a wide range of features that can replace legacy landline phones such as unlimited voicemail boxes and auto attendants.
  • 10
    VoIPco Telecom Reviews

    VoIPco Telecom

    VoIPco Telecom

    $12.99 per month
    5 Ratings
    VoIPco offers a wide variety of services and a rich selection of features to enhance your business's telecom experience. VoIPco allows businesses to upgrade their business phone system and achieve a Return on Investment in 6-12 months. You can access your telecom services from any device on your IT network, including desktop phones, mobile phones, and computers. Unified Communications (UC), is the seamless integration voice, video, chat and contact center/IVR apps. This technology can dramatically improve your communication and business productivity. Our software and services allow you to access your account, and seamlessly integrate our high-value cloud communications services.
  • 11
    EveryDay Voip Reviews

    EveryDay Voip

    EveryDay Voip

    £3.50 per month
    2 Ratings
    EveryDay Voip combines phone, video, meetings, and messaging into one reliable PBX system. Our service is designed to keep you connected to your clients from anywhere in the world. It also gives you the freedom to run your business as you please. You can install our apps on your tablet, smartphone, or desktop and enjoy HD-quality web and audio with one-click functionality. Collaboration is made easy with unlimited SMS, team messaging, and more. Next-generation voice services are scalable, secure, and easy to use. EveryDay Voip is a leader in international carrier services. EveryDay Voip offers the best international wholesale solutions to all communication service providers worldwide, with over 1000+ interconnects that range from PTT's and Mobile Network Operators to VoIP suppliers in-country. To ensure proactive dominance, bring to the table win-win survival strategies.
  • 12
    VoIPstudio Reviews

    VoIPstudio

    VoIPstudio

    $6/month/user
    1 Rating
    VoIPstudio is a professional-grade VoIP phone service available at consumer-level pricing. It offers the quality and security guarantees that business customers demand while delivering innovative features and functionality, flexibility, scalability, and a rich user experience, all backed by a dedicated, omnichannel customer support service. VoIPstudio has been optimized to be multisite, multi-country, and with distributed hosting in the cloud, providing the responsiveness and reliability that enterprise customers need. As a result, it is also highly scalable and suitable for single users and companies with hundreds of extensions. Our customers include media organizations, call centers, software providers, weather organizations, and more. Our solution provides flexible capacity, allowing customers to add or remove users as required. It means they do not pay for redundant capacity, while it has been future-proofed to handle spikes in traffic volumes. We offer more than 40 advanced services and features in all our plans, including number portability, call recording, conference calling, internet failover protection, interactive voice responses, call parking, video calls, video conferencing, and much more!
  • 13
    AT&T Office@Hand Reviews
    An adaptable cloud solution offers voice, fax, text messaging, and audio and video conferencing capabilities, enabling employees to enhance productivity whether in the office or away. Workers can connect seamlessly from smartphones, tablets, softphones, or desktop IP phones, improving their interaction with clients. Use a single number to direct incoming calls to the appropriate staff member, ensuring customers can always reach you efficiently. Access instant local numbers, toll-free options, internet faxing, and time-sensitive services. Benefit from a unified platform that facilitates video meetings and online teamwork, streamlining communication. By opting for a cloud-based service, businesses can eliminate the costs associated with maintenance, software, setup, and support, along with capital expenditures. Experience a user-friendly system for phone, fax, messaging, and conferencing, allowing you to focus more on customer service and less on managing communication tools. Additionally, your business can acquire up to three company numbers: a primary local number, a toll-free number, and a dedicated local number for fax communications, thus optimizing your connectivity options. This comprehensive approach ensures that your communication needs are met efficiently and effectively.
  • 14
    Sherweb Reviews

    Sherweb

    Sherweb

    $7.25 per month
    1 Rating
    Experience a dependable and secure solution tailored for your online business needs. Everything necessary to kickstart your venture is at your fingertips. Enjoy a user-friendly control panel designed for effortless website management. Our team of seasoned support technicians is readily available to assist you. You'll also gain access to an extensive library filled with pre-configured web applications perfect for your site. By partnering with Sherweb, your trusted cloud ally, you’ll be amazed at the possibilities that lie ahead. Our comprehensive cloud management platform, designed to adapt to changing business demands, enables IT professionals to utilize flexible solutions backed by exceptional service from reliable experts. With a foundation rooted in cloud technology, IT professionals can rest assured knowing our continually growing selection of innovative products has been carefully curated and vetted, featuring unique proprietary software you won’t find elsewhere. We provide a robust and mature platform that allows you to balance time efficiency with cost savings seamlessly. Furthermore, you can automate and connect nearly any process by harnessing our state-of-the-art APIs, ensuring your operations are both efficient and effective. With Sherweb, the future of your online business is bright and full of potential.
  • 15
    Momentum Telecom Reviews
    We unleash human momentum with collaboration, connectivity, and communications technology. All business is human—and when custom technology empowers human ingenuity, people and companies thrive. High performing teams do more, achieve more, and win more. Companies become agile, efficient, and resilient. Our team takes pride in making technology easy and cost effective. We love what we do—and it shows in the way we partner with you, from our first conversation to ongoing post-install support. Working with over 30,000 customer locations in 65+ countries, we deliver straightforward, secure, and scalable global managed services and advanced collaboration and communications solutions. Together let’s build your human momentum.
  • 16
    Spoke Phone Reviews

    Spoke Phone

    Spoke Network

    $15 per month
    Spoke is the leading platform for high-value, complex, and regulated conversations. Spoke guides employees to say and collect the right things so deals move forward and customers get better experiences. Spoke integrates with everything, personalizing conversations, driving productivity, and ensuring compliance. Trusted for over 250,000 conversations every day with features such as calls, SMS, WhatsApp, Team Inbox, programmable routing, Personalized IVRs, caller insights, forms, analytics, +more. The Problem Today, only a small portion of your employees are equipped or have the skills to have highly-contextual, complex, and personalized customer conversations. The Solution Spoke empowers every employee with the information and skills to hold high-quality compliant conversations that drive positive customer and business outcomes. To achieve this, Spoke Phone combines the best parts of traditional business phone systems, high-cost contact centers, and leading business process automation, and has made it all easy to use on a mobile phone or desktop. By integrating a customer’s information, processes, and automation into calls, SMS, and WhatsApp conversations occurring on mobile phones, desktops, and other devices.
  • 17
    Yay Reviews

    Yay

    Yay.com

    $6.99 per user per month
    Built for both large organisations and growing businesses, the Yay.com business phone system offers a versatile and dynamic communication solution that both reduces costs and increases business flexibility. With softphone apps that work with the devices you already use, remote and hybrid working is seamless. Collaborate and connect from any location around the world and work the way you want to. Yay provides a platform for distributed workforces in the office, at home or on the go. Benefit from a host of business features including CRM integrations, IVR call menus, call queueing and more. Get started with a free trial and see how we can help your business thrive today.
  • 18
    Fusion Connect Reviews

    Fusion Connect

    Fusion Connect

    $19.95/month/user
    One call can connect your entire business. Fusion Connect is your Managed Services Provider, providing business internet solutions for your SDWAN, business VoIP (UCaaS), internet accessibility, secure networking, and other requirements. Fusion Connect's Business VoIP includes Internet-based faxing and softphones. Compatible with Windows and Mac as well as other devices.
  • 19
    FluentStream Reviews

    FluentStream

    FluentStream

    $20.00/month/user
    Are you looking for a business phone system that is affordable and reliable? It would be great to spend more time with your customers than waiting on hold with your provider every little change. FluentStream is your home! FluentStream is committed to being the best business communication system. No-contract plans are available for all accounts. We provide 24/7 client support. We will be there for you throughout the onboarding process. We understand how difficult phone setup can be. We're happy to take over the heavy lifting so that you don't have too. It's all part and parcel of being the easiest business to work with.
  • 20
    Voxloud Reviews

    Voxloud

    Voxloud

    $31 per month
    Voxloud stands out as Italy's pioneering cloud-based phone system that seamlessly incorporates AI to enhance productivity and save valuable time. You can retain your existing landline number when transitioning to Voxloud at no additional cost to you. With a simple activation process, you can set up your new landline number and phone system in just 59 seconds, allowing you to start communicating professionally from the very first day. Say farewell to traditional phone systems and embrace a smarter way of working with Voxloud's innovative cloud phone solution. This single telephone system encompasses all your communication needs, specially tailored for small and medium-sized businesses. Enhance the efficiency of your incoming calls by utilizing an interactive voice response (IVR) system that can be configured with multiple levels. Work flexibly from anywhere and at any time on your laptop, tablet, or smartphone through our user-friendly apps and VoIP devices. Easily add users from various locations and adjust your phone system’s settings with just a few clicks, ensuring that it meets your evolving business requirements. Furthermore, enrich your phone conversations with the most renowned CRM integrations available in the market, providing a comprehensive solution for your communication needs. As a result, Voxloud enables your team to collaborate effectively, no matter where they are.
  • 21
    UniVoIP Reviews
    UniVoIP's innovative software and solutions drive productivity, efficiency, and performance while embracing and surpassing today's most challenging business communication trends. OfficeConnect™ is the principal product. It delivers 500+ PBX, Omnichannel Contact Center, and Unified Communication features via private or public networking options in a multiinstance infrastructure. UniVoIP also offers UniBridge which is a powerful, high-definition audio, video, and web conferencing solution, screen sharing sharing and meeting logs. It offers summaries, timestamps and summaries and no software download.
  • 22
    CallHarbor Reviews

    CallHarbor

    CallHarbor

    $18/month/user
    CallHarbor offers UCaaS systems for small and medium-sized businesses. Our platform gives you statistics about your employees, integrates to your existing applications, allows you to access full functionality even if you are not in the office. We do more than just make outgoing calls. CallHarbor works with companies in many industries and provides industry-leading systems to improve communication workflow. CallHarbor offers top mobile and web apps that allow you to work from anywhere. We have everything you need, from making calls on your desktop to checking your voicemail in an email, to calling your friends from your mobile device. CallHarbor doesn't limit the number of Queues or Auto-Attendants, Parking Lots or Users that your system can have. This allows you to grow small and start big. We are there for you every step of your journey. You don't need to worry about dropped calls because we have reliable geo-redundant servers. We offer 25+ world-class features as part of your original plan and one flat rate.
  • 23
    Avaya Cloud Office Reviews

    Avaya Cloud Office

    Avaya

    $19.99/user/month
    Avaya Cloud Office is a comprehensive cloud-based communication platform that integrates voice, video, messaging, meetings, and collaboration tools into one cohesive system. It effectively links office-based, remote, and mobile employees across various devices, enabling uninterrupted and uniform communication. With functionalities such as business phone numbers, voicemail transcription, team messaging, and document sharing, it significantly boosts productivity and teamwork. The platform also places a strong emphasis on security through encryption and connects with more than 100 business applications, like Salesforce, Office 365, and G Suite, which assists companies in optimizing their workflows and enhancing overall efficiency. This all-in-one solution is designed to adapt to the evolving needs of modern businesses.
  • 24
    Telavox Reviews
    Work together with your team and connect with clients seamlessly. Utilize any communication method across various devices, no matter your location. With a unified platform for telephony, PBX, messaging, meetings, and contact center functionalities, you can easily engage with both customers and colleagues. Equip your employees with the necessary tools to enhance their productivity. This single application facilitates customer interactions and team collaboration effortlessly. Agents can work from anywhere while still delivering exceptional service to clients. Streamline your tasks with one comprehensive app for calling, messaging, and virtual meetings, allowing for real-time collaboration without interruptions. Implement intelligent features to communicate your availability effectively to your peers. Maintain strong connections and boost productivity with ease. Enjoy a complete suite of voice communication solutions, including fixed and mobile telephony alongside PBX, all centralized in one location. Regardless of the device or platform used, the calling experience remains consistent whether it’s via cellular, PSTN, or the internet, ensuring smooth and reliable communication. The ability to connect seamlessly enhances both individual and team performance, creating a more efficient working environment.
  • 25
    VL Telecom Reviews

    VL Telecom

    VL Telecom

    $30.94 per month
    We prioritize our clients and ensure they are at the forefront of everything we undertake as a client-focused organization. Our commitment to continuous innovation allows us to provide solutions that not only enhance your business now but will also support its growth for years ahead. Regardless of whether you are a fledgling small business or a large multinational corporation, we have tailored solutions for you. You can easily update your Hosted PBX in the Cloud from any location and observe the changes implemented in real time. Each Virtual Landlines Account includes our BusinessTalk App, which enables seamless communication with colleagues, clients, and others. Our platform unifies all functionalities into a user-friendly interface, making it simple to initiate training campaigns and conduct simulated attacks within minutes. You have the flexibility to fully customize your templates, landing pages, and simulated attachments, and even spoof your own domain to execute simulated CEO Fraud attacks, complete with reply tracking to monitor engagement. In this way, we empower your organization to effectively safeguard against potential threats while enhancing overall efficiency.
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