Arc Ecosystem: Top Projects, Partners, and DApps to Watch

Circle's Arc is no longer just a promise in the roadmap. This Layer 1 blockchain, specifically designed for the stablecoin financial sector, launched on the public mainnet on September 16, 2026. 

It features more than 100 applications, over 100 institutional partners and ecosystem developers, and a founding validator group comprising institutions that manage the global financial sector.

USDC serves as the native gas token, so transaction fees are paid in dollars and stay predictable. The network settles in under one second with deterministic finality. 

For anyone tracking the future of on-chain finance, this is the moment Arc moves from infrastructure building to its first real market test.

Key Takeaways

• Arc is a live Layer 1 blockchain built by Circle for stablecoin native finance.
• USDC serves as the native gas token, making fees predictable and dollar denominated.
• The Arc ecosystem launched with 100+ apps and a founding validator cohort including BlackRock, Visa, and DTCC.

What Is Arc?

The Arc ecosystem is the collection of applications, tools, and partners building on Circle's stablecoin focused blockchain. Arc is not a general purpose chain that happens to support stablecoins. It is built specifically for them.

The chain uses USDC as its native gas token. This means users pay transaction fees in dollars, not in a volatile cryptocurrency. EURC and USYC are also natively supported. Transaction fees stay predictable regardless of market swings.

The network offers sub second deterministic finality. Transactions settle in under one second with no risk of chain reorganization. It is fully EVM compatible, so developers can use familiar tools like Hardhat, Foundry, and Viem.

Arc also offers opt in privacy through the Arc Privacy Sector. This allows Solidity contracts to run confidentially alongside the public EVM. Post quantum security protects accounts with SLH DSA SHA2 128s wallet signatures.

In short, Arc is where trusted digital money meets enterprise grade on-chain infrastructure.

Read also: Circle Q2 Report: $701M Revenue and USDC Volume Up 151%

Arc Ecosystem After Mainnet

The mainnet launch on 16 September 2026 changed the picture. Arc is no longer a testnet experiment. It is a live network with real applications, real users, and real money.

Circle reported that more than 100 applications and over 100 institutional and ecosystem builders are live or actively building on Arc. The testnet processed more than 700 million transactions in under a year. 

The global developer community includes more than 75,000 active Arc House members and 10,000 Architect ambassadors who have built over 1,200 projects.

The founding validator cohort includes BlackRock, The Depository Trust and Clearing Corporation (DTCC), Galaxy, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa, and Worldpay (now Global Payments). 

These are the institutions that clear the world's securities, run its payment rails, and manage its capital. They are not simply connecting to Arc. They are participating in the operation of the network itself.

Circle also released two new tools for builders. Arc Studio is an on-chain coding agent that takes ideas to implementation faster. Arc App Kits is a unified SDK for core on-chain fund flows. Together with Arc Portal, users, builders, and enterprises have three access points into Arc.

For more on how the mainnet launch unfolded, see our Arc mainnet coverage. For a deeper look at the technology behind the network, read our Arc blockchain explainer. For a comparison with other stablecoin focused chains, check our guide to stablecoin Layer 1s.

Major Projects by Category

DeFi

The Arc DeFi projects are building the financial primitives that stablecoin users need.

1. Synthra: Synthra combines spot markets, liquidity provision, cross chain swaps, and perpetual trading inside the same trading layer. Users interact with one account, one balance, and one market interface while the protocol handles execution. 

Founder Jacopo Mosconi leads the project. One percent of trading volume from the 2% trading fee goes to a token buyback reserve. For more on Synthra's approach to chain abstraction, see our Arc DeFi coverage.

2. XyloNet: This project offers a stable AMM, bridge, and ERC4626 vaults. Founders Panchu2605 and CarbzXBT are behind it.

3. ViFi Labs: This is a stable AMM led by Tony Olendo and Varoun Hanooman. It was selected as the first Circle Developer Grant of 2026.

4. AchSwap: This protocol combines an AMM, aggregator, bridge, prediction market, and synthetic assets. Founder 0xAsif_eth plans to launch V2, V3, aggregator, and bridge on mainnet day one.

5. UnitFlow: This project supports three different AMM architectures: v2.5 constant product pools, V3 concentrated liquidity, and a V4 style singleton pool manager. 

It also includes liquidity management, analytics, and a no code token factory. Cross chain liquidity integrates Circle's CCTP and Bridge Kit.

6. Tower: This is the native stablecoin DEX aggregator on Arc. It connects to DEXs across the ecosystem and searches for the most efficient path for each transaction. Protocols such as UnitFlow can create liquidity, while Tower connects those separate pools into a more unified market.

Real World Assets (RWA)

Arc is designed to bring traditional capital markets on-chain. Tokenized assets are a core part of the Arc blockchain ecosystem.

1. Tokenized treasuries: USYC is a native asset on Arc. It represents a share of a short duration fund and can serve as collateral. BUIDL, a tokenized treasury fund tokenized by Securitize, is also part of the day one asset base.

2. Tokenized equities and commodities: Arc provides a foundation for bringing these instruments on-chain with instant delivery versus payment. xStocks by Payward and Dinari are among the projects working to bring tokenized financial products on-chain.

3. Tokenized real estate: Stablecoin rails make fractional ownership and settlement faster and cheaper.

4. Structured products: Builders can design on-chain credit with offchain trust signals using identity and cash flow history. Maple, Matrixdock, and Centrifuge are active in this space.

Payments

Payments are the heart of the Arc Network ecosystem. Several projects are building tools for global money movement.

1. Cycles: This payment project is led by founders buchmanster and t_fleischman. It focuses on efficient payment flows.

2. DAPL (Arrel): Founders Nicholas Allen and Jevon Coffin Grey are building payment infrastructure with support from Arc personnel.

3. Cross border payouts: Arc supports fiat backed stablecoins with instant, low cost settlement for international payments. Circle Payments Network is integrated natively into Arc, moving money across borders for a fraction of a cent and settling in near real time.

4. Stablecoin FX perpetuals: Hibachi is building an FX spot and perpetuals venue on Arc that combines a high performance central limit order book with zero knowledge verified settlement. 

Builders can also create perpetual futures markets centered on stablecoin pairs. For more on Hibachi and other FX focused projects, see our Arc FX coverage.

Infrastructure

Infrastructure projects form the backbone of the Arc ecosystem. Most are launchpads that help new tokens launch fairly.

1. Archemist: This launchpad allocates 12.5 percent of buy and sell fees to ARCH buys.

2. Warp: This launchpad and AMM sends 80 percent of WarpDex platform fees to WARP buybacks.

3. Act.fun: This launchpad, AMM, marketplace, and NFT platform has allocated 100 million ACT tokens to the community.

4. Argus Launchpad: Founded by rdbotato, this is a launchpad and AMM for new projects.

5. Tolly: This launchpad and AMM uses USDC fees to buy back and burn TOLLY tokens. For a full breakdown of the platform and its token, read our Tolly coin guide.

6. UBI.fun: This launchpad uses a Uniswap V4 hook and is followed by Arc personnel.

Arc-Native Projects to Watch

Several projects are building specifically for Arc's strengths. These are worth watching as the ecosystem develops.

1. aka.fun: This is a MemeFi launchpad on Arc where tokens can enter Uniswap liquidity directly rather than first passing through a traditional bonding curve migration. 

Every trade carries a 2% fee. Thirty percent is directed toward an RWA treasury that can purchase tokenized real world assets selected when the token is launched.

2. Sidoor: This is an all in one trading terminal. Its interface combines token discovery, trending markets, portfolio tracking, bridging, token launches, and sniper tools. It supports moving USDC into Arc and tracking the transfer before assets become available for trading.

3. Aave and Morpho: These two lending protocols anchor Arc's onchain credit markets at launch. Aave is bringing a new V4 market to Arc. Morpho is serving as a credit layer, bringing open, composable, and capital efficient lending markets to the network from the start.

4. Uniswap, Aero, and fomo: These protocols anchor Arc's day one trading infrastructure.

Read also: What Is cirBTC? Circle Wrapped Bitcoin Token on Ethereum Explained

What Makes Arc Ecosystem Different

Arc's early ecosystem is notable because there is no single dominant narrative. Hibachi is targeting professional FX markets. Tower is working on liquidity aggregation. UnitFlow is building core DeFi infrastructure. 

Synthra is trying to abstract away chains and execution venues. At the same time, aka.fun is experimenting with RWA backed token launch mechanics, while Sidoor is building tools for highly active retail traders.

That combination reflects Arc's broader positioning. The network itself is designed around financial infrastructure, with stablecoin denominated fees, fast deterministic settlement, and native compatibility with Circle's ecosystem. 

But the applications emerging on top of it extend well beyond institutional payments or tokenized securities.

The key question is no longer how many projects Arc can attract before launch. It is whether these different pieces can translate into sustainable liquidity and real on chain activity after mainnet goes live.

Read also: Why Tether and Circle’s Stablecoin Power May Be Bad for Crypto Payments

What's Next

Mainnet is the start of a roadmap centered on proof of stake, privacy, and scalability.

Network Sectors. Purpose built environments for different classes of financial activity are planned. 

These include a Privacy Sector for opt-in confidential transactions, a Payment Sector targeting low cost payments at more than 100,000 transactions per second, and an Agent Sector for verifiable agent identity and auditable records.

Proof of stake and the ARC token. Circle completed the genesis mint of the ARC token in the United States, creating the full initial supply of 10 billion tokens. 

ARC is designed to serve as a digital commodity intended to act as the native coordination mechanism for security, utility, and governance on Arc, with network fees remaining payable in USDC. 

The network is exploring a future transition from Proof of Authority toward Proof of Stake in 2027. For more on the ARC token and its role, see our ARC token explainer.

Post quantum resilience. Arc supports post quantum signatures today, with broader post quantum protections in development.

Agentic economic activity. Arc is the first blockchain designed from genesis for AI agents as economic actors. Circle Agent Stack gives developers and agents policy controlled Agent Wallets, Nanopayments powered by Circle Gateway, and an emerging Agent Marketplace. 

Arc Portal lets people fund agent wallets, set spend limits, and delegate onchain tasks with visibility and control.

FAQ

What is Arc?

Arc is a Layer 1 blockchain built by Circle for stablecoin finance. It uses USDC as its native gas token and offers sub second finality. It launched a public mainnet on 16 September 2026.

What makes Arc different?

Arc is purpose built for stablecoins. Fees are predictable and dollar denominated. It also offers opt-in privacy and post quantum security. A founding validator cohort of major financial institutions secures the network.

Which projects are building on Arc?

Projects include Synthra, XyloNet, ViFi Labs, AchSwap, UnitFlow, Tower, Hibachi, Sidoor, aka.fun, Cycles, DAPL, Archemist, Warp, Act.fun, and Tolly. Major protocols like Aave, Morpho, Uniswap, and Aero are also live.

When did Arc launch?

Arc launched a public mainnet on 16 September 2026. The testnet processed more than 700 million transactions in under a year.

What can you build on Arc?

You can build cross border payments, stablecoin FX perpetuals, onchain credit, tokenized collateral, and agentic commerce tools.

Who are Arc's founding validators?

The founding validator cohort includes BlackRock, DTCC, Galaxy, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa, and Worldpay (now Global Payments).

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