CryptoMach is a multi-currency pool, with a Pay-Per-Last-1000-Shares system, anonymous mining and a global mining network with DDOS protected servers in US & Asia
BTCSweet is a UK based cloud mining company launched in 2017.
BTCSweet charges no maintenance fee. The contracts are "lifetime" (it means that there is no determined duration of the contract and it finishes when the chosen mining plan becomes unprofitable). The platform accepts payments in Bitcoin, or by Payeer, Perfect Money or PayPal.
BitforX offers its customers safe Cloud Mining services. Their Mining farm is located in Kutaisi, Georgia, Industrial Zone and it contains about 10,000 Miners. It also has a convenient and secure Bitcoin wallet, accessible worldwide on any device. Select the desired amount of hash power and generate revenue daily. Their goal is to contribute to the advancement of Bitcoin mining space and give an opportunity to people to access mining operations of the network to generate Bitcoin.
Black Arrow Software has a range of products across the hardware space for crypto currencies. It's original push was for Bitcoin ASIC's with it's Minion Chip. It soon expanded into Litecoin ASICS with the Minion2 chip. Although its chip bundles are prohibitively expensive for most as they are large bulk orders - there are options to buy in smaller quantities.
The Company does produce a mining rig range - the Prospero X-1 and the Prospero X-3 - although pricing has to determined by contacting the Company.
Furthermore the Company has just introduced its own hardware wallet - the eWallet.