Stablecoin startup Payy has raised $6 million in a seed funding round led by FirstMark Capital, with participation from Robot Ventures and DBA Crypto. The funding round utilized a SAFE plus token warrant structure, bringing Payy's total funding to $8 million. Originally known as Web3 database project Polybase, Payy pivoted in 2023 to focus on stablecoin payments, developing a privacy payment network based on zero-knowledge proof technology.