Key points

  • Circle launched Arc's public mainnet on September 16 for stablecoin payments, tokenized assets, lending and institutional settlement.
  • Transaction fees are paid in USDC, while the network begins with a permissioned validator group that includes major financial institutions.
  • More than 100 builders are participating, but privacy tools remain in development and many announced integrations are still being explored or phased in.

Circle has launched the public mainnet of Arc, a Layer 1 blockchain designed for stablecoin payments, tokenized assets and institutional financial activity. The New York-based USDC issuer switched on the network on September 16 after operating a private mainnet with banks, asset managers, payment companies and crypto firms. Arc broadens Circle's business beyond issuing stablecoins by giving the company its own settlement network.

Arc uses USDC for transaction fees

Unlike networks that require users to acquire a separate volatile token for routine activity, Arc charges transaction fees in USDC. Circle says the network provides deterministic sub-second finality and supports applications spanning payments, foreign exchange, trading, lending and asset issuance. Circle Payments Network and its StableFX foreign-exchange service are being integrated with Arc, linking the new chain to the company's existing payments and liquidity products.

Related reporting: Circle’s $400 million Tazapay deal targets stablecoin payouts

Financial institutions form the validator core

Arc begins with a permissioned validator model rather than open participation in block production. Circle's founding group includes BlackRock, the Depository Trust & Clearing Corporation, Galaxy, Intercontinental Exchange, Mastercard, MoneyGram, Standard Chartered and Visa. Circle says the phased rollout is intended to meet institutional requirements for predictable governance, security and compliance. The trade-off is that network operation initially depends on a selected group, making decentralization a continuing question for users and developers.

Tokenized funds and DeFi applications are joining

Circle lists more than 100 institutional and ecosystem builders as live on or exploring Arc. Its launch materials name banks including BNY, HSBC, Societe Generale and State Street, alongside exchanges, custodians and DeFi protocols. Tokenized products expected on the network include Circle's USYC money-market fund and BlackRock's BUIDL fund, while Uniswap and other trading applications are part of the day-one ecosystem. Participation does not mean every announced integration is fully deployed.

Circle is expanding beyond USDC distribution

The launch gives Circle a direct role in the infrastructure where stablecoins and tokenized securities move. That creates a new potential revenue and product channel, but it also places Arc alongside other payment-focused blockchains competing for developers, liquidity and institutional transactions. Circle says it will continue supporting USDC across outside networks, so Arc is being presented as an additional home for financial applications rather than a replacement for USDC's multichain strategy.

Privacy and the ARC token remain unsettled

Some features are not complete. Circle describes opt-in confidential balances and transactions as in development for a network-wide release. CoinDesk also reported that Circle minted an initial supply of 10 billion ARC tokens, but the token is not publicly available and the mint does not commit Circle to a public launch. The company is exploring a possible transition from proof of authority to proof of stake in 2027, while saying network fees would remain denominated in USDC.

Adoption will be measured in real settlement activity

Arc arrives with prominent partners and more than 100 applications, but its significance will depend on transaction volumes, reliability and whether planned integrations progress from testing to routine use. Banks and asset managers gain another controlled route into public blockchain infrastructure, while developers get dollar-based fees and direct access to Circle's stablecoin stack. Users will also need clear disclosures about validator governance, application risks and the status of privacy features. The launch is operationally meaningful, but the longer-term test is whether Arc can attract sustained liquidity without weakening Circle's relationships with competing networks.

Sources

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