Genesis Mining has been around since 2014. They provide lifetime Scrypt and Bitcoin cloud mining services. They currently they have 3 undisclosed locations in Europe, America and Asia.

Bitmain launched HashNest in mid-2014 to provide a hardware-backed cloud mining service. HashNest has a reliable reputation with payments and one the lowest maintenance fees.

Backed by mining hardware provider, ZeusMiner, ZeusHash provides stable cloud hashing services. ZeusHash currently maintains 5% of Bitcoin (SHA-256) hashrate and 10% of Litecoin (Scrypt) hashrate.

NiceHash provides an innovative crypto currency cloud mining, hash rental service and multipool. They allow you to buy or sell hashing power without contracts on pay-as-you-go basis.