RingCentral is a comprehensive VoIP solution that is suitable for businesses. It has multiple features and can be customized to meet your business needs, making it suitable for small businesses to enterprises. Customer support can be difficult to get hold of if you call by phone, although there are live chat and email form options as well.
Vonage is phone service based on Voice over Internet Protocol (VoIP) that is suitable for businesses and residential communication needs. It offers a high-quality service with a 30-day money back guarantee. While the solution is cost-effective, it is more expensive than some solutions that are available; however, it does offer many useful features that allow you to customize it to your needs.
Grasshopper is a virtual phone system that works well for businesses. The simple cost structure and affordable plans make it suitable for businesses of any size; however, International phone calls are not included in the plans and the service can become expensive if you need to make many calls overseas.
Mitel is aimed at medium to large businesses who are looking for multiple office VoIP support, and also include awesome contact center functionality. They are best known for their cloud solutions. These include seamless mobile functionality, and simple and affordable options for scalability.
MegaPath is one of the top VoIP systems for medium to large businesses. With a number of plans and many features, there are solutions to suit all business needs. With the pricing per user model that MegaPath uses, this solution can become pricey, although its customizable nature makes it a popular choice.
CloudPhone VoiP comes with a powerful, unified communications service perfect for small businesses. For a flat monthly rate, businesses get a local phone number with extensions as well as virtual receptionist. Paying extra will also come with collaboration features like conference calling, call recording, business hours, and professional greetings.