NiceHash is a global cryptocurrency hash power broker and cryptocurrency exchange. They are also an open marketplace that connects sellers of hashing power with buyers using the sharing economy approach. The company provides software for cryptocurrency mining. You can join and use the platform for free to earn Bitcoin. While you’re not technically mining Bitcoin, you mine various altcoins, and they are “cashed-out” automagically, so you’re paid in one currency. It simplifies life but isn’t quite as profitable as mining various altcoins yourself.