NiceHash.

NiceHash runs a marketplace where people with mining machines sell their computing power and others buy it. Founded in 2014, it has its roots in Maribor, Slovenia; since late 2024 it has been run by NiceHash AG, a company in Zug, Switzerland. NiceHash says it isn’t a mining poolMining poolA group of miners who share the work of finding blocks and split the rewards, so each gets paid steadily instead of rarely., a service that combines many miners’ work and shares the rewards: each buyer chooses a pool, and the power they buy works for it, so blocks found with that power are credited to the pool. NiceHash also holds bitcoin for its users, but a block with its name doesn’t mean the transactions inside it went through NiceHash.

Blocks tagged “/NiceHash/” come from EasyMining, which NiceHash launched in September 2022. A buyer pays for up to four hours of other people’s mining power and uses it to try to find a block alone, which is called solo mining. If it finds one, the reward goes to that buyer, into their NiceHash wallet or to an address they chose, or is shared among everyone in a team package; if it finds none, nothing is paid. NiceHash counts more than 200 Bitcoin blocks found this way since October 2022. That reward is separate from the transactions confirmed inside the block.

In 2026 most blocks under NiceHash’s name have carried a different tag, “NiceHashMining”, and each pays its whole reward to one address. NiceHash said the first two, found on 13 January 2026, were its own, mined while testing a product it hadn’t yet launched; it gave no details. Its blocks from 2015 to 2017, tagged “NiceHashSolo”, came from an earlier solo pool, which paid almost all of each block’s reward straight to the miner who found it, in the block’s first transaction.

In December 2017 hackers stole 4,640 bitcoins belonging to NiceHash’s users. NiceHash repaid them out of its own earnings and finished on 16 December 2020. In 2021 the US charged three North Korean military hackers over a string of thefts, among them $75 million from a Slovenian cryptocurrency company in December 2017; NiceHash says that was the attack on it.