Blockchain Labs is a South Korean software company, founded in 2013 in San Francisco, California, that specializes in blockchain technology. In 2018, the company engineered InfraBlockchain, a public, cryptocurrency-free blockchain designed for practical applications. Its most notable achievement is COOV, a blockchain-based digital certificate verification system for COVID-19 vaccinations. This system, developed in 2020 and launched in April 2021, was officially adopted by the Korea Disease Control and Prevention Agency, used by 43 million Korean citizens, and is also recognized by the European Union. Expanding its offerings, Blockchain Labs launched BlockChat, a decentralized messaging app, in 2022, alongside COOV and InfraBlockchain as its key products.