The round was led by M13 Ventures, Republic Labs, Gumi Crypto and an early Uber investor Shervin Pishevar.
The one-tap miner now supports ethereum, zcash, grin, and monero alongside BTC.
The company now offers 6.5 percent interest on earnings held in Coinmine wallets.
Mining innovator Balaji Srinivasan pivoted away from that business in 2017, but now believes the time is right for a home miner.
A new firm called Coinmine has announced a device aimed at enthusiasts who'd like to mine crypto, but don't want to learn a new technical skill set.