Join the 1500 companies using G2 Track to manage SaaS spend, usage, contracts & compliance.

Best VoIP Providers

Voice over internet protocol (VoIP) software uses an IP network to transmit phone calls, and in some cases video calls and other messaging, seamlessly without the need to connect to an extra network. It is a modern form of PBX, short for private box exchange or private branch exchange, a broad term for private telephone networks within organizations. Businesses can utilize VoIP solutions as a reliable means of voice-based communication that leverages a pre-established internet connection. It enables calls between workers on the same network and to external clients or vendors. For organizations with a complete VoIP system, the technology can be used by employees at every level for their basic communication needs. These solutions save the company and its employees money and the hassle related to standard phone hardware and membership plans. VoIP solutions provide base level call features along with other helpful features depending on the service.

VoIP is integrated collectively into company systems, and users can often access features through a plugin on their web browsers or by connecting to the network through a personal phone using their internet connection rather than a wireless network. Depending on the VoIP provider, it may work in conjunction with specially designed hardware or be hosted in the cloud and not require additional hardware. VoIP software may integrate with other platforms such as CRM software to give users easy access to important customer information during calls or web conferencing software to add increased functionality for multiuser video meetings. Conferencing tools will occasionally allow attendees to use their VoIP connections for optimal performance and call quality. Certain VoIP solutions offer features of web conferencing and team collaboration software, such as multiway video chats and instant messaging but only within the established network.

To qualify for inclusion in the VoIP category, a product must:

  • Transmit voice over the user’s IP network to be received on a separate computer or device
  • Utilize the internet through both public and private networks
  • Allow varying numbers of calls at the same time with no interruption
  • Allow users to bypass landline connections or wireless networks on company or personal devices to tap into the unified network
G2 Grid® for VoIP
Leaders
High Performers
Contenders
Niche
Momentum Leaders
Momentum Score
Market Presence
Satisfaction
content
Features
Star Rating

VoIP reviews by real, verified users. Find unbiased ratings on user satisfaction, features, and price based on the most reviews available anywhere.

Compare VoIP Providers

Results: 281
G2 takes pride in showing unbiased ratings on user satisfaction. G2 does not allow for paid placement in any of our ratings.
Results: 281
Filter Results
Filter by:
Sort by
Features
Star Rating
Sort By:

    Dialfire instantly turns your browser into a complete outbound call center.

    Dial Gate is a web-based VoIP softswitch and billing server for the IP and PSTN networks. Once installed on a server, it functions as a VoIP softswitch by connecting calls from one phone line to another within the same or different networks. It also offers management features including real-time monitoring, pre- & post-paid billing, automatic invoice scheduling & call-plan subscriptions.

    Diallog Telecommunications provides voice, internet, and data services to small, medium and large businesses.

    High-end performance for businesses that require an efficient way to centralize data, simplify data management and rapidly scale storage.

    Dzinga provides professional communication solutions. All-in-one platform. Cloud-based. Multifunctional.

    eir SIP Voice is revolutionizing the core communications tool of business that carries both calls and data over just one connection.

    Ease of use with a modern Graphical User Interface

    eTollFree is Tier-1 World Wide VoIP Provider. Provide superior local and toll-free numbers for individuals, or call center solutions for large Fortune 500 companies

    Superior Customer Relationship Management Software, written by experts in the complexities of telecom billing... and Absolutely reliable Billing Service, with redundant equipment, power backup, data security, and staffed with efficient, responsive professionals.

    Unlike our competitors, we don't charge you extra for the features. Whether you have one phone or one hundred, you get every feature we offer.

    Firmafon helps smaller companies create good connections with customers through telephony, mobile and chat solutions.

    FlyNumber offers VoIP and hosted PBX solutions.

    Fongo Works is a free cloud-based phone system for small business.

    Whether you want to send personalized messages to a single client or notify thousands, Fonoster gives you the tools to communicate like never before.

    FusionWorks combines the cost saving benefit of cloud-based telephony with the productivity advantages of unified communications. Businesses get the advantage of more powerful communications with the integration of voicemail, web collaboration, video, instant messaging and presence, fax and phone service.

    GAO offers systems designers and engineers a complete VoIP packaged solution, which includes modules for fax and data over IP

    Gradwell offers cloud-based telephony and VoIP solutions.

    HODUPBX offers a flexible PBX software product, providing voice, video and multimedia using a single network

    Leading UK supplier of telecoms equipment & services. Quality products for homes, offices & businesses of all sizes

    Hosted Telecom Solutions, Inc. is a full service provider of Internet, voice, and data center solutions. We combine project specific professional services teams and high quality telecommunications and cloud products with a customer focused help desk to provide a unique technology experience for our customers.

    Vitel Global is a cloud-based business phone system provider exclusively for organizations that require professional communication features

    iCall, Inc. is a telecommunications provider of free, and low-cost, domestic and international VoIP services for both businesses and consumers.

    PHONE SYSTEM IN THE CLOUD with an experienced team of dedicated experts

    Phone system support with live video chat. Its just like having a technician in your office. Instead of trying to describe a problem that you dont really understand, eliminate the teck talk! open the app, and start live video streaming to get instant feedback and support.

    Unified communications platform to deliver hosted communications and collaboration tools.

    Intulse offers cloud-based phone systems to seamlessly connect you, your employees, your clients and your business.

    Carusto offers professional software solutions for telecommunication tasks. Our software solutions allow you to automate business processes quickly and efficiently, to improve service quality and reduce costs.

    ITK Communications offers intelligent voice, data, video, managed services and cloud solutions for business communication

    itPBX provides cloud-based VoIP phone systems and unified communication services. itPBX customers include start-ups, small to medium businesses, large enterprise customers, call centers, non-profit organizations, legal firms, real estate agencies, and more. itPBX offers a scalable cloud architecture that provides an integrated, seamless experience that enriches and simplifies the communication experience for companies. This makes it easier to reach customers and interact with co-workers.

    Kasookoo is a cloud-based business phone solution. Instead of having multiple phone lines and desk phones, Kasookoo is an app based on your mobile and/or desktop with a virtual receptionist, call routing and transferring, conference calling and cheap international calls. This allows the user to manage a whole team of employees through their existing mobile phones, and allows for the team to have unlimited outgoing calls to the UK, US and Canada.

    SIP trunking provides an ideal gateway to begin transitioning to a cloud-based unified communications model while continuing to leverage investments in on-premises equipment.

    MicroSIP - open source portable SIP softphone based on PJSIP stack for Windows OS.

    Mitel Virtual Solutions is a virtualized voice applications that can reside alongside other enterprise business applications in mainstream data center environments and on virtual desktops. Mitel Virtual Solutions software will allow you to have six phone extensions running off of Mitel's virtualized call control: the Virtual Mitel Communications Director.

    With Mobex, your phone service will be more valuable than ever. Mobex is more affordable and customizable than big phone service providers that box you into generic packages & contracts.

    Momentum Mobility for Smartphone and Desktop provides end-users with a Unified Communications (UC) experience across mainstream mobile and desktop platforms including Windows, Mac, iOS and Android.

    Natterbox is a cloud-based business telephony and voice services platform, which provides business communication service between organizations and its customers. The software is any business, whether you're looking to scale rapidly or improve function across a large business. Natterbox supports organizations across various industries including recruitment, travel, ecommerce, financial services, media, government, utilities and others. Its key customers include Groupon, ETX Capital, Reed.co.uk, Legal & General, Barnardos. Natterbox provides a scalable and agile Global PBX, which is native in Salesforce CRM. Natterbox CTI (Computer Telephony Integration) system features click to dial, screen pop and wrap-up codes along with automatic follow-up scheduler and single sign-on with Salesforce. Natterbox logs all inbound and outbound fixed line and cellular call data to its contacts database, accounts or any other custom records. The software also provides more than 120+ customizable and real time reports in Salesforce for easy monitoring of sales call productivity.

    Unified communications (UC) and voice over IP (VoIP) management solutions, a part of Data Center Management, help ensure high quality of service. We provide pre-deployment assessments, UC component monitoring, automated problem diagnostics and improvement analysis.

    The NetVanta 7100 is an all-in-one, Office in a Box that provides complete voice and data solutions in a single platform. The NetVanta 7100 offers outstanding business value as well as simplifying VoIP communications for small to medium businesses. ADTRAN delivers industry leading technical innovation with the NetVanta 7100 by integrating all the voice and data networking functions into a single box and is designed to be the ideal solution for businesses that have up to 100 stations at each location.

    Newt offers Managed PBX Business Phone System and Business Internet.

    Noble's SIP, VoIP and IP solutions use a centralized platform and share agent licenses across locations, reducing hardware/software costs and streamlining system management and support.

    UNIFIED COMMUNICATIONS Voice, messaging, video conferencing and screen sharing all in one Cloud or On-Premise

    Mais que uma plataforma, somos pessoas que acreditam na comunicação eficiente e sem burocracias

    OBI+ is a connected car platform that provides everything required by a service provider within the automotive industry to launch a connected car service within days. It is a complete suite designed to enable connected car services at scale.

    eReceptionist as a virtual office provides a phone number and phone system.

    OnSwitch provides 24/7 technical support and cloud-based phone solutions for small and mid-sized businesses.

    Optus Loop Live lets you use business phone features on your mobile or PC with a monthly subscription and the Optus Loop Live app.

    Learn More About VoIP Providers