Overledger

Quant is not a blockchain; it is an interoperability layer. Quant describes Overledger as a blockchain-agnostic API gateway that lets applications and banks reach different blockchains and legacy systems through one interface. Quant's February 2026 architecture explanation describes standardized APIs, legacy-system connectors, and separate transaction preparation, signing, and execution stages; these are vendor descriptions.

QNT is an ERC-20 token on Ethereum. Its supply is widely cited as fixed at 14,612,493 tokens after a September 2018 burn, but the token contract's totalSupply() returned 45,467,000 on September 29, 2026. Quant's service terms allow customers to pay with QNT or a card and say QNT is the only digital asset accepted for access unless otherwise agreed. The terms permit possible staking services, but an active retail program and yield were not confirmed.

Quant is not an ISO 20022 RMG member. Quant describes QuantNet as ISO 20022-native, and secondary coverage says Overledger's PayScript engine aligns messaging with ISO 20022; both are design claims, not certifications. On September 24, 2026 UK Finance announced that seven UK banks completed the first live customer transactions using tokenised sterling deposits on the GBTD platform developed by Quant, and The Clearing House selected Quant for its On-Chain Money Initiative, which is expected to become available in the first half of 2027. The Bank of England also lists Quant among the 18 organizations in its Synchronisation Lab.