How does Skype make money?
Skype to Skype calls are free anywhere in the world. You can be using Skype on a computer, mobile, or tablet. As long as you are both using Skype, the call is completely free.
Skype also provides premium features at great low rates, things like SMS texts, and making calls to landlines or cell phones. All you need is a little bit of Skype Credit, or a subscription.
By having great value features that people want to pay for, we're able to keep our core features free.