Across Protocol Review

At A Glance

Who Is Across Protocol Best For?

Best for:

Across Protocol is ideal for DeFi users moving assets between Ethereum Layer 2 networks, traders seeking fast 2-second cross-chain transfers with minimal fees, developers building cross-chain dApps requiring reliable bridging infrastructure, and users prioritizing security through battle-tested optimistic oracle verification.

Skip if:

You should consider alternatives if you need to bridge to non-EVM chains like Bitcoin, Solana, or Cosmos, you're looking for the absolute lowest fees regardless of speed, you're uncomfortable with relayer-dependent transaction fulfillment, or you need bridging for networks outside the Ethereum ecosystem.

Our Take

Drawing from our comprehensive analysis of this intent-based cross-chain solution, Across Protocol stands out with its revolutionary intent-based architecture and universal design. The platform now processes \$19 billion in total volume with recent \$1 billion monthly volumes, making it significantly more efficient and cost-effective than traditional bridging solutions.

Skrumble Scoring Breakdown

Exceptional speed and security with proven track record, but limited to EVM chains and recent governance concerns prevent perfect rating.

See our full crypto bridge scoring methodology here.

What is Across Protocol and How Does it Work?

Across Protocol is the only crosschain intents protocol in production today, enabling the fastest and lowest-cost interoperability solution without security tradeoffs. Unlike complex trusted message passing solutions, Across connects users to dApps via intents, not just blockchains to blockchains.

Revolutionary V4 Architecture

Across V4, launched in July 2025, introduces a universal architecture powered by intents and zero-knowledge proofs. The major breakthrough allows new chains to be added in hours instead of weeks, fundamentally changing how cross-chain bridges scale.

The protocol operates through a three-layer system:

1. Intent Layer: Users specify desired outcomes rather than execution paths
2. Relayer Network: Decentralized relayers compete to fulfill user intents quickly
3. Settlement Layer: Zero-knowledge proofs verify intent settlement across chains securely and universally

Security Through UMA's Optimistic Oracle

Across Protocol is secured by UMA's optimistic oracle, which verifies transfers optimistically, allowing for quick processing while maintaining security. The system requires just one honest actor to dispute fraudulent transactions, making it highly secure while maintaining speed.

Reality Check: While Across excels in speed and efficiency, the recent June 2025 governance controversy regarding token allocation raises questions about DAO oversight that potential users should consider.

Unique Features

ERC-7683 Standard Innovation

Across Protocol introduced ERC-7683, a new token standard designed specifically to fill cross-network intent and prevent relayer fragmentation. This standard, developed with Uniswap, creates universal compatibility for cross-chain intents.

Uniswap Integration

The protocol powers Uniswap's in-app bridging for both its web app and wallet, enabling transfers across nine chains. This integration demonstrates Across's enterprise-level reliability.

ACX Rewards System

The protocol maintains its dual rewards approach:

Referral Program

Users earn ACX tokens by referring others, with tiered rewards based on volume and referral count. The program operates through custom referral links that benefit both referrer and referee.

Reward Locking

This advanced version of traditional liquidity mining discourages farm-and-dump activities and rewards committed contributors. The longer liquidity providers leave rewards unclaimed, the faster they earn additional rewards.

Supported Networks and Assets

Networks

Across supports 18 mainnets and 9 testnets, including Ethereum, Arbitrum, Base, Optimism, and more. For the complete list of supported networks, visit the official Across documentation. Major supported networks include:

• Ethereum Mainnet
• Arbitrum One
• Base
• Blast
• Optimism
• Polygon
• zkSync Era
• Linea
• Mode
• Scroll
• Hyperliquid
• Unichain

Supported Assets

The platform now supports 50+ tokens, a significant expansion from the original 9. Key assets include:

• Major Stablecoins: USDC, USDT, DAI
• Native Assets: ETH, WETH
• DeFi Tokens: BAL, UMA
• Protocol Tokens: ACX
• Bitcoin: WBTC

Fees Structure

Across maintains its simple, transparent fee model:

Liquidity Provider Fees

0.06% to 0.12% of the transaction amount, significantly lower than many competitors. Transfers, such as 1 ETH, are processed with fees as low as \$1.

Relayer Fees

Users can choose relayer fees between 0% to 50% of the bridged amount, with market competition typically keeping fees minimal.

Security and Audits

Across is audited by OpenZeppelin (May 2025), TrailOfBits, and CertiK, representing comprehensive security coverage. The protocol's security model includes:

• UMA's Optimistic Oracle verification
• Intent-based relayers providing economic security
• Zero-knowledge proofs in V4 architecture
• Decentralized dispute resolution

Reality Check: While security audits are comprehensive, the protocol's reliance on relayers means users depend on third-party capital availability during high-demand periods.

Performance Metrics

Volume Statistics

• Total processed volume: \$19 billion
• January 2025: \$1 billion monthly volume
• Median fill time: 2 seconds
• Success rate: High reliability with minimal failed transactions

Market Position

Across performs strongly among cross-chain bridges with a 4.56/5.0 overall score based on security, speed, fees, and network coverage, competing effectively with established players like Stargate Finance and Portal Bridge.

Setting the Record Straight

Our research uncovered several persistent misconceptions about Across Protocol that deserve clarification:

Myth:

Across Protocol is just another generic bridge

Reality:

Across uses a unique intent-based architecture where users specify outcomes rather than execution paths, fundamentally different from traditional bridging mechanisms that require complex multi-step processes.

Myth:

Fast bridges sacrifice security for speed

Reality:

Across maintains enterprise-level security through UMA's battle-tested optimistic oracle while achieving 2-second fills, proving speed and security aren't mutually exclusive when properly architected.

Myth:

Cross-chain bridges are too complex for average users

Reality:

Across abstracts complexity through intent-based design, allowing users to simply specify desired outcomes while the protocol handles execution automatically.

ACX Token Economics

Current Status

Recent Developments

Across Protocol raised \$41 million through token sales led by Paradigm, with participation from Bain Capital Crypto, Coinbase Ventures, and Multicoin Capital. This funding supports broader adoption of ERC-7683 and Ethereum's rollup-centric development.

Token Allocation

• 52.5%: Across DAO Treasury Reserve
• 25%: Strategic Partnerships and Fundraising
• 12.5%: Airdrop Distribution

10%: Protocol Rewards

Important Note: The June 2025 controversy involved allegations that team members used governance proposals to transfer approximately \$23 million worth of ACX tokens to their private company, raising questions about governance transparency.

Recent Developments and Future Outlook

Major Partnerships

• MetaMask Integration: Trusted bridge provider
• Uniswap Partnership: Powers cross-chain functionality
• Unichain Launch: Recently integrated with Unichain's public mainnet as a cross-chain transfer tool

Technology Roadmap

The future points toward complete bridge abstraction where users shouldn't need to understand complex mechanics, similar to how we don't think about TCP/IP protocols when browsing the internet.

Things to Consider

Limitations

• EVM-Only: Limited to Ethereum Virtual Machine compatible chains
• Relayer Dependency: Transaction speed depends on relayer availability
• Governance Issues: Recent controversies raise questions about decentralized governance

Competition

Across competes in a crowded bridge market against established players like Stargate Finance, Portal Bridge, and others, each offering different strengths for non-EVM chain support and alternative bridging approaches.

Skrumble Community Ratings

We're building our Across Protocol review section! Share your experience to help others, particularly regarding:

• Cross-chain transfer speeds and reliability in different network conditions
• Fee comparisons with other bridges you've used for similar routes
• Asset availability and which tokens you successfully bridged
• Customer support quality and response times for any issues
• Integration experiences if you're a developer using Across in dApps
• Governance participation and your thoughts on recent DAO decisions

Your insights help fellow crypto users make informed bridging decisions. Submit your review to contribute to our community knowledge base.

Conclusion

Across Protocol has established itself as a highly competitive cross-chain bridge through innovative intent-based architecture and universal scalability. The V4 upgrade represents a fundamental shift in how bridges operate, enabling rapid network expansion without compromising security or speed.

Bottom Line

For Layer 2 and EVM-compatible chains, Across offers among the fastest, most cost-effective bridging solutions with strong security guarantees. However, potential users should be aware of governance concerns and the protocol's current limitation to EVM ecosystems.

The protocol's \$19 billion in processed volume and major partnerships with MetaMask and Uniswap demonstrate real-world adoption and enterprise trust, making it a compelling solution for cross-chain interoperability. For comparison with other leading bridges, see our Stargate Finance review and cross-chain bridge comparison hub.

FAQs

What Makes Across Protocol Different from Other Bridges?

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Unlike complex trusted message passing solutions, Across connects users to dApps via intents, not just blockchains to blockchains. This intent-based approach delivers 2-second median fill times without security compromises.

Is Across Protocol Safe in 2025?

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Yes, with comprehensive audits from OpenZeppelin, TrailOfBits, and CertiK, plus UMA's optimistic oracle security model. However, users should be aware of recent governance controversies when considering long-term token holdings.

What's the Best Alternative to Traditional ETH Bridges?

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For Layer 2 transfers, Across Protocol excels with 2-second fills and 0.06-0.12% fees. For broader ecosystem support including non-EVM chains, consider Portal Bridge or Stargate Finance.

How Does Across V4 Improve on Previous Versions?

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V4 introduces universal architecture powered by zero-knowledge proofs, allowing new chains to be added in hours instead of weeks, fundamentally solving the scalability challenge that plagued earlier bridge designs.

Risk Warning:

Trading Forex, CFDs, and cryptocurrencies carries a high level of risk and may not be suitable for all investors. These markets are volatile and can result in the loss of your invested capital. Make sure you fully understand the risks before trading.