Best Business Phone Systems for Microsoft 365

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.

Dialpad offers a modern business phone solution that eliminates the need for conventional desk phones by utilizing a cloud-driven platform compatible with any device. This allows teams to enjoy high-quality voice calls, send SMS and MMS messages, and take advantage of sophisticated functionalities such as call routing, voicemail transcription, and AI-driven insights, all integrated into a single cohesive system.

The Yeastar P-Series Phone System serves as an all-in-one business telecommunication solution, integrating voice, video, and collaboration features into a powerful, cohesive platform. Designed for contemporary businesses, it eliminates the need for disparate communication tools by providing a seamless "PBX-Plus-More" framework.

Adversus offers more than just a conventional business phone solution; it is a comprehensive outbound calling platform that integrates workflow automation, performance monitoring, and compliance features. Experience the ease of making and overseeing large volumes of outbound calls through a cloud-based system, eliminating the need for additional hardware. The platform facilitates calls in over 150 countries with an impressive uptime of 99.97% or higher. It boasts ISO certification and SOC 2 compliance, making it ideal for sales-focused organizations that require more than basic telephony. Adversus provides structured outbound execution and complete insight into representative performance.

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.

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.

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.

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.

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.

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.

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.

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.

dialnote is a VoIP phone system built for teams tired of paying $40–80 per seat to legacy carriers. Get a VoIP phone number, local, toll-free, or international, or port your existing business phone number for free, then add unlimited users on a flat plan with no per-seat surprises at scale. AI voice agents handle inbound calls 24/7 with transcription, summarization, and intent extraction in 15+ languages. Each agent runs against a configurable knowledge base, so it can answer FAQs, capture leads, take detailed messages, transfer high-value calls, and trigger downstream actions without human intervention. Smart IVR routing, shared inboxes, group calling, warm transfers, business-hours rules, and call queueing keep distributed teams in sync on shared numbers. The platform is API-first. REST endpoints and webhooks expose calls, messages, transcripts, contacts, and call events, so engineering teams can pipe data into Salesforce, HubSpot, Zendesk, Slack, custom dashboards, ticketing systems, or any workflow automation platform. Two-way CRM sync logs every interaction without manual entry; AI call summaries, auto-tagging, and call evaluations come through as structured fields, not just transcript dumps. Setup takes minutes, numbers provision instantly and porting is handled free of charge. Includes unlimited US/Canada calling, zone-based international rates, automatic call recording, real-time analytics, and native iOS/Android apps. Plans from $49/month with a 10-day trial, no credit card required. Built for SMBs, MSPs, dev teams, and ops folks who want a programmable VoIP phone number without carrier lock-in or per-user pricing that scales with headcount instead of revenue.

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.

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.

Engage customers throughout the entire journey via voice and digital channels (chats, email SMS, email and social media). Integrate business communications with business system, giving valuable information to employees at every customer touchpoint. CoreInteract's drag-and-drop design makes it easy to manage workgroups and routing rules that meet your business needs. You can set the priority and order of which workgroups will receive customer inquiries. CoreInteract lets you manage your interactions in Teams natively without the need for a separate desktop software or application. Your team members can easily distinguish between customer calls and internal calls by clearly marking workgroup calls. CoreInteract can retrieve a Dynamics 365 customer record for each answered call. This gives you more control over your customer information and allows you to call a customer directly within Dynamics 365.

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.

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.

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.

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.

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.

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.

Our skilled team will tailor your BroadConnect VoIP service, equipping your office with the necessary hardware and support to elevate your phone system to its fullest potential. BroadConnect Canada is committed to serving the entire business sector, boasting a national presence and dedicated lines that cater to all your IP telephony requirements through our commercial phone systems. By integrating unified communications with collaboration tools like video conferencing and file-sharing, we foster a dynamic work atmosphere. We guarantee exceptional call quality, adaptability, and system scalability, all made possible through our robust and global IP network featuring a wide range of advanced phone functionalities. Our team will oversee every facet of your VoIP business phone service, ensuring your office phone system remains updated with the latest technological advancements. Furthermore, we offer a cutting-edge unified communications service that provides multiple access points to authorized resources, ensuring seamless connectivity for your business operations. With our focus on innovation and customer satisfaction, we aim to enhance your overall communication experience.

Introducing our budget-friendly, robust, and user-friendly cloud phone system. Crafted in the UK, Wave empowers you and your team to work from any location. Managing and setting it up is a breeze with our comprehensive control panel. You can be operational in just a few hours thanks to our straightforward onboarding process and rapid configuration. Access the system from any device, no matter where you are in the world, and enjoy an array of valuable features designed to elevate your business. Wave is tailored for the modern workforce, simplifying the way you conduct business. Our platform includes essential tools that enable companies to manage their telephony from a distance effectively. With Wave, you can tackle challenges more swiftly, communicate seamlessly, and enhance collaboration in unprecedented ways. The Wave solution is designed to help you cut expenses, save valuable time, and effortlessly incorporate hybrid and remote work models into your organization. We are committed to your success, offering both landline and mobile-compatible minute bundles along with full access to all call management and administrative capabilities. Our goal is to ensure you have everything you need to thrive in today’s dynamic work environment.

Unify Your Communications! All your communications are in one place! You can chat, text, fax and conference as well as call, chat, text, conference, collaborate, and more. NetFortris Community unifies all communication -- voice, video and messaging, collaboration, conferencing and meetings, as well as call center -- in one platform that is easy to use. We also put it in the Cloud so your team can collaborate on any device, from anywhere, whether they are at work, home, or on the move. NetFortris Community is built to meet your business communication needs today and tomorrow. Comm-unity is easy to scale as your business grows. It always works when you need and gives your team the most recent functionality. Having all communication channels in one place will streamline teamwork and increase productivity. Comm-unity is available to your team from any internet-enabled device. You can work at home or on the move. Comm-unity grows with your business, whether you add hundreds or one user.