HashQuark

HashQuark is a blockchain infrastructure company founded in 2018 and headquartered in Hong Kong, operating as a subsidiary of HashKey Group. The company provides enterprise-grade node validation and staking services across more than 40 mainstream proof-of-stake public chains, including Ethereum, Cosmos, Polkadot, Solana, Cardano, and Tezos.

Its services are designed primarily for institutional clients such as family offices, funds, cryptocurrency wallets, custodians, and regulated exchanges. HashQuark operates a globally deployed node infrastructure with automated monitoring for around-the-clock uptime. In addition to staking, the company has developed a decentralized identifier (DID) product supporting multiple public chain ecosystems and has explored Ethereum Layer 2 and Bitcoin Lightning Network infrastructure.

In January 2024, HashQuark rebranded as HashKey Cloud, expanding its product line to include compliant liquidity staking, security token offering infrastructure, and appchain node operations, all continuing under the HashKey Group umbrella with operations across Asian, European, and American markets.