FusionElectric

I switched to OnSIP from 8x8, Inc. and have been thankful that I did. The pricing is great and in addition the service and reliability have been exceptional, much better than the call quality I was experiencing with 8x8. OnSIP is much more flexible and adapt to your business needs rather than making you fit into their box of provided features. Their admin portal allows you to route calls exactly how you want them handled and their ability to work with standard industry equipment was a huge benefit to our business. In particular being able to manually program my phone to allow multiple lines for multiple business/marketing fronts was a must have. Many VOIP providers can't or wouldn't allow me to use a VOIP phone with multiple lines just as bsuinesses have used analop multi-line phones for years.
For a business that doesn't have a high call volume per extension OnSIPs pay for what you use pricing structure is the best bet for my business and many other businesses I am familiar with. Why pay on a per extension basis when what you really need is one number with multiple extensions that can talk to each other completely free! If you want to add DID numbers for each extension you can also do that for a very reasonable fee but if you have someone answering your phones or use an auto attendant why pay for numbers that are not needed.
OnSIP has a business model that works great for a lot of small business owners out there. If you are a high volume user and need unlimited calling for every extension then it may not be the best for you, but for most businesses OnSIP may be the best fit for them.