Circle opens the Arc public testnet with over 100 participating companies

Circle/Arc

Circle opened Arc's public testnet on October 28, 2025, with over 100 participants including BlackRock, Goldman Sachs, HSBC, Deutsche Bank, Visa, Mastercard, AWS, Coinbase, Kraken, Alchemy, and Chainlink. Arc is a layer-1 blockchain for stablecoin payments and capital markets, offering dollar-denominated fees, sub-second finality, and optional privacy.

• 100+ participants collectively serve billions of users and manage hundreds of trillions in assets and payments globally.
• Arc features dollar-based fees, sub-second settlement, configurable privacy, and compatibility with Circle's broader ecosystem.
• Long-term vision includes community-driven governance and distributed validator participation beyond Circle's current stewardship.