VoIP Providers

Top Rated VoIP Products

TrustRadius Top Rated for 2021

These products won a Top Rated award for having excellent customer satisfaction ratings. The list is based purely on reviews; there is no paid placement, and analyst opinions do not influence the rankings. Read more about the Top Rated criteria.

VoIP Providers TrustMap

TrustMaps are two-dimensional charts that compare products based on trScore and research frequency by prospective buyers. Products must have 10 or more ratings to appear on this TrustMap.

VoIP Providers Overview

What is VoIP Technology?

VoIP stands for Voice over Internet Protocol. It is technology for delivering voice and other forms of communication over an Internet Protocol or IP. VoIP providers offer communications services that the business world relies on for collaboration. Typically, phone, video conferencing, and live chat are conducted on the VoIP platform, without assistance from the public switched telephone network (PSTN). There are also hybrid solutions that combine VoIP with PSTN.

VoIP presents the underlying technology for Unified Communications as a Service (UCaaS), which combines voice/VoIP, audio/video conferencing, and instant messaging/chat into one platform.

Benefits of IP Telephony

Compared to regular telephone networks, IP telephony aims to be:

  • Cheaper

  • Simpler

  • More scalable

  • Higher-availability

  • Equally or more reliable

VoIP Providers vs. Unified Communications as a Service

Some VoIP providers are geared for SMBs who want a business phone with advanced telephony-type features and maybe some conferencing capability or minutes.

More sophisticated providers offer a highly scalable, end-to-end unified communications platform designed for larger enterprises. These UCaaS vendors tend to offer more reach and flexibility compared to point tools for collaboration, live chat, and web conferencing. They also aim to encompass all communication within the enterprise and across its boundaries, including integrated contact center functionality.

The top vendors offer both a unified communications platform as well as a low-cost VoIP solution.

VoIP Provider's Features & Capabilities

VoIP Providers generally support the following functions:

Cloud PBX:

  • Hosted PBX

  • Multi-level Interactive Voice Response (IVR)

  • User templates

  • Call reports

  • Directory of employee names

Call Management:

  • Answering rules

  • Call recording

  • Call park

  • Call screening

  • Message alerts

VoIP System Collaboration:

  • Video conferencing

  • Audio conferencing

Mobile Apps:

  • Mobile app for iOS

  • Mobile app for Android

Advanced Features:

  • Integration with contact & customer information systems (e.g., CRM, Outlook, etc)

  • Internet faxing

  • Ring group (splitting calls or rotating them within a group of employees)

VoIP Providers Comparison

To more easily compare VoIP products, consider evaluating different options based on these 3 key factors:

1. Standalone voice software vs. UCaaS suite: Are you looking for a simple voice-only solution, or a VoIP product that is embedded within a larger unified-communications-as-a-software (UCaaS) suite? Think about which type of solution will best serve your business needs. If you already use other online communication applications (e.g. video chat, messenger, team collaboration features), then being able to centralize these capabilities within one platform might be worth the extra cost. On the other hand, if you’re mainly looking for voice solution to use while traveling or in place of your own personal phone number, a lighter weight VoIP solution might be the best fit.

2. Pricing model: Does it make the most sense for you to pay for VoIP services per user per month, or on an as needed basis? Many large VoIP vendors offer packages that charge on a per user/month basis. However, other products include free calling to any other individual using the same application, and charge by the minute for other types of calls. If making a large number of calls is part of the job description at your company, as it is for sales reps or call center agents, then you may want to consider a per user/month package.

3. Mobile compatibility: Today’s workforce is becoming increasingly mobile, and making sure your employees can access VoIP services while traveling or working remotely is more important than ever. Many VoIP vendors already offer both iOS and Android mobile applications, but make sure to check that the products your considering have mobile applications that support all your devices. Look for mobile application feature ratings on product scorecards.

Start a VoIP provider comparison

Additional Factors to Consider

Security: Authorization, Authentication, Transport Layer Security (TLS), Media encryption (SRTP)

IP networks can be vulnerable, so various methods of providing communication privacy and security should be considered. Vendors may vary in how they attempt to secure communications.

Business Phones & other Hardware Components

Vendors must offer hardware to support their platforms' capabilities, such as phones, headsets, servers, and other infrastructural devices. Subtle differences between these devices may contribute to very similar and relatively equal software platforms being perceived very differently in terms of quality or fit. Therefore, these subtleties should not be discounted.

Call & Communications Analytics

A great deal of data is transmitted through these systems. Owing to this, VoIP solutions provide analytics to evaluate agent, channel, and call performance. These analytics can be used to seek out inefficiencies or anomalies, endpoint status, and more. Integration with VoIP analytics platforms might help monitor system performance.

Field, Telework & Telecommute

One potential benefit of VoIP and virtual offices is the ability to interact with personnel (or support personnel as they interact with customers) as though they were in the office. This includes dashboard interfaces, a reliable connection, quality streaming, and security protocols and methods (e.g. Virtual Private Network / VPN). Products may vary in their ability to function outside the boundaries of the enterprise.

Pricing Information

VoIP providers often charge on a per month, per user basis. Prices generally start at around $20 per month, per user, and will increase from there with more advanced features.

Another factor to consider in the cost structure is the hardware. Many providers offer hardware rental as part of their service, at additional cost.

More Resources

VoIP Products

(76-100 of 144) Sorted by Most Reviews


ActivePBX is a telephony and VoIP software solution from ActiveServe, Inc.

Cogi Call Recording

Cogi Call Recording is a telephony and VoIP software solution from Cogi, Inc.



Starting Price $25

K7 is a telephony and VoIP software solution from International Telcom LTD.

Toshiba Strata CIX

Toshiba's Strata CIX is an IP communications platform that supports legacy digital technology as well, for companies that want to continue using legacy equipment or move to an IP based model in a less total and immediate fashion.

NEC Univerge 3C

NEC's Univerge 3C is a VoIP and unified communications platform designed for larger enterprises.

MiCloud Flex

MiCloud Flex is a cloud-based (or hybridized) unified communications service, from Canadian company Mitel.

MiVoice Office 250

MiVoice Office 250, formerly Aastra 5000, is a VoIP unified communications platform offered by Canadian company Mitel for SMBs with mobile or dispersed workforces.

Toshiba IPedge

IPedge, from Toshiba is a business telephone and unified communications appliance.


Clearspan, formerly Aastra Clearspan but now owned and supported by Mitel (since 2014), is a unified communications platform offered by the Canadian company as viable for enterprises with 1,500 to 100,000 potential users.

OpenTouch Business Edition

OpenTouch Business Edition from Alcatel-Lucent is a unified communications platform recommended with companies with up to 1500 employees, or 3000 connected devices.

Dial Gate PBX Softswitch & Billing Server

Dial Gate PBX Softswitch & Billing Server is a telephony and VoIP software solution from Dialexia.

MiVoice MX-ONE

MiVoice MX-ONE, formerly Aastra MX-One, is now owned and supported by Mitel since the merger (January, 2014); it's a unified communications platform.

Dial Office IP-PBX

Dial Office IP-PBX is a telephony and VoIP software solution from Dialexia.

Toshiba UCedge Unified Communications

Toshiba offers the UCedge Unified Communications platform, for telephony, VoIP and conferencing, functional across disparate enterprise endpoints.

Atos Unify OpenScape Enterprise Express

Atos Unify OpenScape Enterprise Express is an all-in-one unified communications platform combining all modes of collaboration (video & web conferencing, messaging, and VOIP) under one platform, targeted at enterprises with 200 to 2000 employees.

OmniPCX Enterprise Communications Server

Alcatel-Lucent offers OmniPCX Enterprise Communications Server as a business telephony, VoIP, or unified communications platform, scalable to meet the needs of medium to large, and very large, enterprises. This offering integrates with Alcatel-Lucent's OpenTouch collaboration modules…


AVOXI Core is a hosted PBX solution from AVOXI.

Atos Unify OpenScape Business

OpenScape Business is a unified communications offering from Unify (formerly Siemens Enteprise Communications), combining telephony & VOIP, web & video conferencing, and messaging in one integrated platform targeted at SMBs.


ReliaTel is a Unified Communications platform with VoIP analytics & monitoring capabilities. It allows users to manage and support their IP, voice, and data network environments and service levels. ReliaTel is provided by Tone Software Coroporation.


Ajura is a mobile application developed by Ajura Pte Ltd. According to the vendor, this app allows users to save up to 90% on international mobile roaming. Using Ajura, one can receive calls on his or her home country mobile number. Ajura also helps users make low-cost calls via…


VerberyVBX is a cloud-based call center solution that is based on Twilio OpenVBX.

CenturyLink Traditional Voice Services

CenturyLink® serves the voice business calling needs of customers of all sizes with a comprehensive portfolio that includes premise equipment, telephone numbers, local, long distance, toll free, and international services. A complete range of network solutions complement these services,…


Inteliquent headquartered in Plymouth offers a range of voice and communication services, including VoIP.

Kandy Link

Ribbon Communications headquartered in Westford offers Kandy Link, a WebRTC Gateway to bridge VoIP services with web services.


Axmor is a custom software development services company focused on providing IT solutions for tech startups and small businesses that require additional expertise across multiple IT fields. They help develop systems, automate business processes, and handle integration with third-…

Frequently Asked Questions

What’s the difference between VoIP and unified communications software?

VoIP, or voice-over-internet-protocol, software enables users to place voice calls using an internet connection rather than relying on a traditional landline phone or cellular data. In comparison, unified-communications-as-a-service (UCaaS) software is a larger suite of integrated online communication technologies including VoIP, video and audio chat, business messaging, and team collaboration features. Check out our article about the differences between VoIP and UCaaS to learn more.

What’s the difference between a fixed and non-fixed VoIP?

A ‘fixed’ VoIP phone number is tied to a physical location (e.g. personal or company address), these types of VoIP lines are typically more secure than non-fixed VoIP services. Non-fixed VoIP lines are not attached to a specific location and can be purchased and accessed internationally. Note, VoIP providers are more likely to provide access to local emergency services for fixed-VoIP numbers. Read more about the difference between fixed and non-fixed VoIP services.

What are the most important things to consider when buying a VoIP solution?

A recent TrustRadius survey of 200+ VoIP users found that these are the 5 main buying criteria to keep in mind when looking for a new VoIP service:

  1. Price
  2. Ease of use
  3. Reliability of the service
  4. Call quality
  5. Access to 24/7 support

To learn more about VoIP software in general and read product reviews, visit our VoIP category page.

What do businesses use VoIP software for?

VoIP software can be used for a range of business communication needs. Common use cases for VoIP services include:

  • Having a personal VoIP phone number
  • Internal business communication
  • Sales communication
  • Client/customer communication
  • Customer service/support
  • Contact center activities

Learn more about VoIP software and read product reviews on our VoIP category page.