Circle Launches Arc: Layer-1 Blockchain Built for Stablecoin Infrastructure

Circle Launches Arc: A Layer-1 Blockchain Built for Stablecoin Finance

Circle, the company behind the widely-used USDC stablecoin, has introduced Arc, a new layer-1 blockchain engineered specifically for stablecoin applications and institutional finance. Unlike general-purpose blockchains such as Ethereum or Solana, which support diverse use cases, Arc is purpose-built to address the unique infrastructure demands of stablecoin-based transactions and payments at scale.

The initiative reflects Circle’s assessment that most existing blockchain platforms were not designed with stablecoins in mind. This gap has created technical and operational challenges that limit institutional adoption of stablecoin infrastructure. According to Rachel Mayer, VP of Product Management at Circle, enterprises and builders using USDC across multiple networks consistently expressed three core requirements: predictable transaction costs, deterministic settlement finality, and privacy features compatible with regulatory compliance obligations.

Technical Architecture and Fee Innovation

Arc introduces several technical innovations tailored to stablecoin commerce. The network uses USDC directly to pay transaction fees, eliminating the volatility complications that arise when users must convert stablecoins to alternative gas tokens. This design choice simplifies the user experience for institutional and retail participants alike.

The platform features a modified fee mechanism based on Ethereum’s EIP-1559 standard. Rather than adjusting fees at the block level, Arc employs a weighted moving average of network demand to determine transaction costs. This smoothing mechanism maintains fee predictability and keeps them low. All fees are denominated in USDC and directed to an on-chain Arc Treasury. Additionally, the network can support other stablecoins as gas through a paymaster system, offering ecosystem participants flexibility in how they settle transactions.

Arc also includes a built-in foreign exchange engine and optional privacy features designed to comply with real-world regulatory frameworks. The network delivers instant and irreversible transaction settlement—what the industry calls deterministic finality—a critical requirement for institutional and settlement applications. Built-in interoperability with other blockchains and traditional finance systems, powered by Circle’s CCTP and Gateway services, enables USDC to move seamlessly across the blockchain ecosystem.

Development Progress and Institutional Backing

According to Circle, the public testnet launched in October 2025 and has since processed over 500 million transactions across nearly 3 million wallets. The private mainnet is currently operational with participation from more than 100 institutional and ecosystem builders, representing significant institutional validation for the platform’s approach.

The public mainnet is scheduled to launch on September 16, 2026, with an announced ARC token as part of the network’s incentive structure. Arc’s emergence reflects broader market momentum for stablecoins, particularly following the GENIUS Act, which received presidential approval in July 2025. As stablecoins like USDC and USDT become foundational infrastructure for payments and settlement, Arc positions Circle to influence how that infrastructure evolves. For XRP and the wider crypto sector, a dedicated blockchain layer for stablecoin commerce signals growing institutional confidence that digital assets will play a central role in global finance.

Source: Circle, via Decrypt. Not financial advice.