- Circle launches its own blockchain to control its own rails
- Arc arrives with BlackRock, Visa and Mastercard as founding validators, betting that AI agents will become its next major user base
Circle Internet Group announced on September 16, 2026, the launch of the public mainnet of Arc, an open Layer 1 blockchain specifically designed for financial markets, real-time money movement, and agentic economic activity.
DATA Tether dominates stablecoin issuance but does not have its own blockchain project with this level of institutional deployment
The network launches with native integration of USDC—the world’s largest regulated digital dollar, with more than $74 billion in circulation—along with more than 100 active applications and more than 100 institutions and developers operating from day one, including global banks, asset managers, payment networks, exchanges, custodians, DeFi protocols, and AI platforms.
From Stablecoin Issuer to Owner of the Entire Rail
Until now, Circle issued USDC but relied on third-party blockchains—Ethereum, Solana, Tron—for that digital dollar to circulate, be exchanged, and settle. With Arc, the company is making a strategic leap: moving from being the currency issuer to controlling the infrastructure where that currency moves.
The network natively integrates Circle StableFX, which enables 24/7 foreign-exchange trading with near-instant settlement, as well as the Circle Payments Network, which now moves money across borders for a fraction of a cent and in near real time.
“Arc is the most significant launch in Circle’s history since USDC itself, and it is the realization of the premise we’ve operated on for thirteen years: money should work the way the internet works,” said Jeremy Allaire, Circle’s co-founder, chairman and CEO. “USDC was step one. Arc is the network built for what comes next.”
It is the company’s most ambitious bet since launching USDC 13 years ago, and it sets Circle apart from Tether, which dominates stablecoin issuance but does not have its own blockchain project with this level of institutional deployment. Circle does not want to be another passenger on someone else’s infrastructure: it wants to own the road.
A Blockchain Designed for Banks, Not Crypto Natives
Arc’s design directly addresses the compliance concerns that have held traditional banks back from operating on public blockchains for years. Fees are paid in USDC, eliminating exposure to a volatile token; transaction finality is deterministic and occurs in less than one second; opt-in privacy is available through viewing keys for confidential balances and transactions; and, above all, the validator set is permissioned rather than open to anyone.
The strongest evidence of this approach is who is validating the network. The founding cohort includes BlackRock, DTCC, Galaxy, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa and Worldpay (now Global Payments): the institutions that currently clear securities, operate payment rails, and manage capital at global scale are not simply connecting to Arc—they are directly participating in operating the network.
“ICE’s institutional clients are increasingly looking for ways to operate seamlessly across traditional and digital markets. Arc’s native capabilities, including predictable fees and instant finality, address real friction points raised by these clients,” said Michael Blaugrund, Executive Vice President of Strategic Initiatives at ICE.
The message is clear: Arc combines a permissioned validator set with the regulatory clarity of the GENIUS Act, allowing banks, asset managers, and companies to use a public blockchain for treasury operations, trading, and confidential payments. This represents a break from the foundational value of decentralization that defined the first crypto wave: here, legitimacy does not come from the network being open to everyone, but from who audits it and who operates it.
The Agentic Economy: The Bet on the Future
Arc positions itself as the first blockchain designed from the ground up for AI agents to act as economic actors in their own right.
Circle Agent Stack provides developers and agents with policy-controlled wallets (Agent Wallets), micropayments enabled by Circle Gateway, and an emerging Agent Marketplace. Arc Portal, meanwhile, allows people to fund agent wallets, set spending limits, and delegate onchain tasks with visibility and control.
The data supporting this bet is already verifiable. Since the launch of Circle Agent Stack in May 2026, the overwhelming majority of agent-to-agent payments settled under the x402 standard have been conducted in that currency.
There is still no large-scale, highly visible use case of agents paying one another outside technical niches. But that is precisely the narrative Circle needs to establish to justify why it built its own Layer 1 instead of operating on Ethereum or Solana.
What Comes Next
The mainnet is only the beginning of a roadmap focused on proof of stake, privacy, and scalability.
Circle has already completed the genesis mint of the ARC token—10 billion units—making the company the first publicly traded company to issue a network token for a new Layer 1 blockchain. The company clarified that this does not imply an immediate public token launch, but rather represents a technical milestone in its planned transition from Proof of Authority to Proof of Stake, scheduled for 2027.
It remains to be seen whether the announced institutional adoption—banks, exchanges, custodians, asset managers—translates into real transaction volume beyond the strength of the participating brands, and how the regional angle develops.
Circle StableFX already lists the Argentine peso (wARS), Mexican peso (wMXN), Colombian peso (wCOP), Chilean peso (wCLP), Brazilian real (wBRL), and Peruvian sol (wPEN) among the local currencies that are either active as tokenized currencies or in the process of being integrated—a development that warrants close attention for Latin America coverage.