Top IP Telephone Service Providers for Modern Businesses

Simple Phones
June 5, 2024

In an era where efficient and effective communication is crucial for business success, Voice over Internet Protocol (VoIP) phone systems have emerged as a transformative solution. By leveraging the power of the internet, these systems provide advanced features, seamless integration with business tools, and significant cost savings. As we explore the top IP telephone service providers, it's evident that VoIP technology is not just revolutionizing communication; it's reshaping the entire business landscape.

Key Takeaways

  • Top IP telephone service providers are distinguished by their reliability, call quality, scalability, and integration capabilities.
  • Transparent pricing and a clear understanding of service tiers are essential for selecting a cost-effective VoIP solution that aligns with your budget.
  • Advanced features such as call management, integration with business tools, and customization options are critical for maximizing the efficiency of VoIP services.
  • The ability to scale and adapt is fundamental, allowing for growth without the need for extensive overhauls, ensuring businesses remain competitive and efficient.
  • Choosing the right IP telephone service provider is crucial for ensuring reliable and high-quality communication for your business or home office.


RingCentral is a popular and affordable VoIP provider, offering cloud-based solutions ranging from all-in-one team messaging to high-definition video calls. The latest iteration, dubbed RingCentral MVP, stands for "messaging, video, and phone," which is indicative of its move away from basic voice services toward a UCaaS approach.


  • Unlimited calling in the USA and Canada
  • Automatic call recording
  • Voicemail to text
  • AI-backed transcription and call analysis
  • Integration with Microsoft Teams and various CRM applications


Customer Reviews

RingCentral has long impressed us with its business VoIP offerings. Its AI-backed transcription and call analysis features are particularly impressive. Bob Mesas, Vice President of Sales for Central Business Systems, noted RingCentral’s robust service: “RingCentral is probably the most refined VoIP application on the market in terms of the features it offers.”

RingCentral has proven itself reliable at high call volumes, something that many rival services struggle with when put under pressure.


Nextiva is one of the best and most reliable business VoIP services in the market. You don’t need an annual contract to use their service. They offer many powerful features like unlimited calling, auto-attendant, unlimited internet faxing, and advanced call management. You’ll also get a toll-free number for free with all their plans.

Key Features

  • Unlimited calling in the US and Canada
  • Auto-attendant
  • Unlimited internet faxing
  • Advanced call management
  • Toll-free number included
  • VoIP calling
  • Video conferencing
  • Team messaging
  • SMS texting
  • Thread conversations
  • Meeting rooms
  • File sharing
  • Multi-level auto attendant

Why We Picked It

Nextiva is a full-featured, versatile VoIP system with an attractive UI that works across desktop and mobile platforms. It also offers some of the most comprehensive call analytics of any of the systems we tested. Its administration functions are straightforward, including a graphical call-flow builder that lets admins set up automatic call routing and interactive voice response (IVR) trees. What's more, it can sync contacts with address books from Google Workspace and Microsoft 365.

General Features

Nextiva has unlimited voice, video calling, voicemail, and internet faxing capabilities. Customers get toll-free numbers for no added charge. By upgrading, you can access unlimited conference calls with potentially limitless participants and features, such as screen sharing, voicemail transcription, and an auto-attendant.

Best Value and Customer Support

Nextiva has an impressive desktop app that combines business phone, texting, team chat, routing, caller ID, customer experience tools, and many business-friendly features.


Vonage is a VoIP pioneer in both the business and residential markets. Because of its deep roots in the industry, it's had a chance to build and refine many features that younger players are still trying to iron out. Vonage offers a good selection of third-party software integrations, notably including Salesforce, and it even offers support for companies that want to build bespoke applications that integrate with the platform.

Vonage’s Business Communications platform offers a desktop and mobile app with VoIP calling, video meetings, team chat, and SMS. Users can make unlimited calls and texts within the US, Canada, and Mexico, and access basic routing features like IVR, analytics, and call groups.

In addition, all subscriptions provide call continuity services that automatically route calls during a power outage or emergency. Vonage provides local direct inbound dialing (DID) numbers in more than 96 countries and supports U.S. and international locations.

Optimizing communication: choose the best VoIP service for your business needs. Consider features, provider reputation, and terms of service for seamless communication solutions.


  • One-click integrations with third-party software
  • Unlimited calling and SMS service in the US and Canada
  • Microsoft Teams integration
  • 40+ standard VoIP features including call screening, do not disturb, caller ID, call forwarding, voicemail to email, call blocking, and file sharing
  • Call center support


  • Some features, like the shared messaging inbox, are reserved as add-ons
  • Monthly plan cost: $40.00/User

Best For

Vonage is best for businesses looking for a unified communications hub with extensive customization options and robust third-party integrations.


8x8 is a robust IP telephone service provider, particularly known for its international calling capabilities. It offers unlimited local and global calling across 48 countries, making it an excellent choice for businesses with a global presence. Additionally, 8x8 provides SMS, team chat, and video meetings, ensuring comprehensive communication solutions for modern businesses.

Key Features

  • Unlimited local and global calling across 48 countries
  • SMS, team chat, and video meetings
  • Integration with business productivity apps
  • Livestream meetings via YouTube (X2 and X4 plans)
  • Meeting capacity of up to 500 users


8x8 offers five total plans: two unified communications plans and three contact center plans. However, they do not provide public pricing information, requiring potential customers to contact them directly for details.

Pros and Cons


  • Connects with business productivity apps
  • International calling capabilities
  • Plans combine phone and virtual meeting features


  • Lack of transparency in pricing and plan details
  • Some advanced features missing compared to competitors

Customer Service

8x8 has a proactive approach to customer service, replying to negative reviews in less than 24 hours. This responsiveness is a testament to their commitment to customer satisfaction.

8x8's focus on UCaaS demonstrates its forward-thinking approach, making it attractive to organizations that want to leverage software-based calling and conferencing solutions.


Ooma Office is a UCaaS platform and phone system for small businesses. It supports VoIP calling across North America and Mexico, SMS texting, and video meetings with up to 25 participants. We appreciated how the platform offers a free toll-free number and 500 toll-free minutes with each account signup. The interface feels slightly outdated, and it lacks some useful phone features.

Key Features

  • Free toll-free number with 500 inbound calling minutes every month
  • Supports analog devices, including overhead paging systems and fax machines
  • Unlimited calling to Puerto Rico
  • International and “pay-as-you-go” calling options
  • Personal phone number and voice-to-text
  • Number porting available

Phone Options

Customer Reviews

Ooma supports analog devices in its basic plans, while other companies in our rating put desk phone compatibility in higher-tier plans only. Ooma’s analog device support includes overhead paging systems and fax machines. Ooma is also the only company in our ratings to offer unlimited calling to Puerto Rico.

When choosing the best phone company for your small business, Ooma stands out as a top contender. Analyzing cloud-based phone systems, cost structures, scalability, and expert recommendations can help you make informed decisions.


Grasshopper is a distinctive and cost-effective solution tailored specifically for small businesses, particularly startups. It boasts a simple, user-friendly interface that facilitates seamless navigation. The streamlined call-forwarding functionality enables the elimination of app downloads unless the need arises to engage in text-based communication through the Grasshopper business number. Furthermore, incoming voicemails can be conveniently emailed, thereby obviating the necessity for callers to listen to them directly through the app.


Grasshopper starts at $14 monthly with an annual agreement. Its plans are priced to suit solopreneurs, startups, and very small businesses. If you are looking for an easy way to set up a professional contact with a simple phone system, Grasshopper represents an affordable option with decent value for money.

Mobile and Desktop Apps

Grasshopper has both desktop and mobile apps. When you create an account, Grasshopper will link your personal number to your new business number, after which you may make calls using the desktop or mobile app. Grasshopper apps are compatible with Windows and Mac for desktop and with Apple and Android-capable smartphones.

Customer Reviews

Grasshopper is a popular VoIP option among individuals and small business owners. Satisfied customers frequently mentioned that they enjoyed how simple and easy the service is while providing everything necessary to support a virtual business operation or remote work. They also enjoy its convenience and mention that it is priced fairly.

Grasshopper is a simple business phone with just calling and SMS. With a basic interface, Grasshopper makes a great option for solopreneurs and small teams that don’t need a phone system with bells and whistles.


Mitel is a longtime player in business voice communications. As a result, its guiding principle for its MiCloud Connect VoIP system has been to replicate the features of traditional, on-premises PBX systems, such as making it easy to interconnect remote offices. Even when it's acting as a cloud service, it prefers to have a designated central office so that it can take advantage of a robust LAN. That means it can be harder to set up than some other business VoIP services, but it can offer real advantages in certain scenarios.

Who It's For

Tiny shops might want to skip this one. Mitel's PBX-focused approach suggests it's better geared for midsize to large businesses. Similarly, highly distributed workforces might not gain as much benefit from MiCloud Connect as they could from other competitors. If, on the other hand, you're in the process of bringing employees back into a central office, and like the idea of leveraging a well-managed LAN for optimal call quality, Mitel's offering deserves a look.

Mitel MiVoice 5360 VoIP Phone

Moving up the price scale, the MiVoice 5360 is an executive-class desktop handset that comes with one-touch access to several phone features and a built-in HTML toolkit for desktop applications development. The MiVoice 6910, meanwhile, offers dual Gigabit Ethernet ports and a large 3.4-inch LCD display that makes it ideal for businesses of all sizes.

Mitel MiVoice 5304 VoIP Phone

At the lower end of the price range, Mitel offers the MiVoice 5304 IP Phone as an entry-level device that supports both SIP and MiNet protocols. Its compact design means that it is particularly well suited to being deployed in environments where a small footprint is required, including cruise ship cabins, hotel guest room phones, university dorms, or classrooms.

Mitel MiVoice 6940 VoIP Phone

One of the flagship devices offered by Mitel is the MiVoice 6940. With its Bluetooth 4.1 connectivity and wireless handset, employees can benefit from added mobility that means they can take calls in any part of the home or office.

Zoom Phone

Zoom Phone is a complete VoIP phone system for business with team chat, call monitoring, call queues, IVR, and call analytics on each plan. The desktop and mobile apps are easily navigable, and team chat conversations support file sharing and emoji reactions. The platform also uniquely offers the option for per-minute payment, or the option for unlimited domestic calling in a country outside the US. We felt that Zoom Phone’s voice quality was above average, likely due to their use of the Opus codec.

What We Like

  • Cohesiveness across channels: We were impressed by how seamlessly each of Zoom’s channels and collaboration tools integrate. Zoom Phone syncs with Zoom Meetings, enabling us to begin whiteboards or note documents in chat and easily continue them during video conferences.
  • Domestic calling outside the US: Zoom is one of the few VoIP providers that support unlimited domestic calling outside the US.

Additional Features

When testing Zoom Phone, I used a domestic number to place calls. It was very easy for me to get a toll-free number, as they start at just $5 per month. Zoom also offers local and international numbers, which cost as low as $5 monthly. There is a special international calling add-on that runs $120 per year. If you want to add premier developer support or a virtual workspace reservation, you have to contact Zoom’s sales team to get a quote.

Mobile and Desktop Apps

Zoom has apps downloadable to desktop and mobile devices, compatible with Windows and Mac on PCs or iOS and Android on phones and tablets. I appreciated the ability to use Zoom to place calls through laptops or smartphones; I only wish that the call quality could have been a little better.

Customer Service

Zoom Phone’s customer service is responsive and helpful, ensuring that any issues are quickly resolved. The support team is available 24/7, which is a significant advantage for businesses operating in different time zones.


Dialpad stands out as a highly technologically advanced phone system solution. The company embarked on the development of their proprietary artificial intelligence (AI) technology several years ago, well ahead of the prevailing trend. This strategic decision has endowed Dialpad with a heightened level of security, surpassing that of most of their competitors. Dialpad also boasts an extensive array of native integrations specifically tailored for CRMs, facilitating a streamlined and enhanced work environment for the employees, resulting in better experiences for the customers.

Frequent Software Updates

We like Dialpad's dedication to its role as a software-based communications service. Although Dialpad supports hardware handsets, its real focus is its softphone, which the company regularly updates. In fact, Dialpad says it ships new software updates every two weeks. Frequent updates aren't always a good thing, but we appreciate the company's insistence on constantly refining its offering.

Customer Reviews

Dialpad is another very popular VoIP provider, and there are hundreds of customer reviews detailing past and present experiences with the company. Satisfied customers describe Dialpad as a reasonably priced service with great features. Customers enjoyed the AI components, flexibility in day-to-day communication, and the ability to send and receive calls through PC and mobile devices. Some also appreciated Dialpad’s scalability.

Mobile and Desktop Apps

Dialpad has apps for both desktop and mobile, and I tested both. I appreciated how easy it was to communicate by voice or video across multiple devices. Dialpad’s apps are compatible with Windows and Mac operating systems and iOS and Android smart devices.

Dialpad is among the top 5 IP telephone service providers ranked based on features, pricing, and customer satisfaction. Highlights RingCentral, Zoom Phone, 8x8, Vonage, and GoToConnect for diverse business needs.


GoToConnect is a robust IP telephone service that integrates seamlessly with popular tools like Zoho CRM, Microsoft Teams, and Salesforce. It effortlessly supports remote and on-site staff, making it an excellent choice for businesses with multisite management needs.


GoToConnect offers two main plans:

Additional phone numbers can be added for $5 per month. Both plans include unlimited calling to over 50 countries, but international phone numbers are not available.


  • Unlimited calls, SMS, and team messaging
  • Integration with CRM software
  • Instant response feature for first-time callers
  • Seamless integration with GoToWebinar and other GoTo family products


GoToConnect offers several IP phone systems to its customers. Here are the most popular ones:

  1. Polycom VVX 450
  2. Cisco 8841
  3. Yealink T46S
GoToConnect is the ultimate small business phone system for multisite management. It effortlessly supports remote and on-site staff, empowering you to oversee your operations smoothly.

Trial Period

GoToConnect offers a 14-day trial period. Subscriptions are available on a monthly or annual basis.

Discover the power of GoToConnect and never miss a call from a customer again. Our AI-driven solution ensures that all your inbound and outbound calls are handled efficiently, providing a seamless experience for your clients. Ready to transform your business communication?


In an era where efficient and effective communication is crucial for business success, Voice over Internet Protocol (VoIP) phone systems have emerged as a transformative solution. By leveraging the power of the internet, these systems provide advanced features, seamless integration with business tools, and significant cost savings. As we have explored the top IP telephone service providers, it's evident that VoIP technology is not just revolutionizing communication; it's reshaping the entire business landscape. From cost savings to improved satisfaction, the benefits are clear and impactful. As businesses continue to navigate the challenges of a digital-first world, the adoption of VoIP systems stands as a testament to the power of innovation in modern business communications.

Frequently Asked Questions

What are the key features to look for in an IP telephone service provider?

Key features to consider include call quality, scalability, integration capabilities with business tools, transparent pricing, and advanced call management options.

How does VoIP technology benefit modern businesses?

VoIP technology offers cost savings, improved operational efficiency, seamless integration with business tools, and enhanced client engagement, making it a transformative solution for modern businesses.

Why is scalability important in IP telephone services?

Scalability allows businesses to grow without the need for extensive overhauls, ensuring that the communication system can adapt to the changing needs of the business.

What should businesses consider when choosing an IP telephone service provider?

Businesses should consider pricing models, feature sets, customer support, call quality, and the ability to integrate with existing business tools to ensure they choose the right provider.

How has VoIP technology revolutionized business communication?

VoIP technology has redefined voice communication by providing advanced features, cost-effective solutions, and seamless connectivity, thereby enhancing overall business communication and collaboration.

What are the benefits of using a VoIP system over traditional analog PBX?

VoIP systems offer enterprise-grade phone system features at a lower cost, including advanced call management, better scalability, and integration with other business applications, which are not typically available with traditional analog PBX systems.