Summary: Cross-chain bridges serve as decentralized platforms, enabling crypto enthusiasts to effortlessly transfer tokens across multiple Layer 1 and Layer 2 blockchain networks. These innovative tools expand the possibilities for users, allowing seamless transactions between leading smart contract platforms like Ethereum, Solana, Avalanche, and Arbitrum, among hundreds of others.

For those looking to optimize their cross-chain activities, here are the top five cross-chain bridges, each excelling in specific areas to cater to different investor needs:

  1. Across Protocol: Best Cross-Chain Crypto Bridge
  2. Synapse Protocol: Best for EVM Layer 1’s
  3. Stargate Finance: Best for Stablecoin Bridging
  4. Portal Bridge: Best for non-EVM Chains
  5. Hop: Good Alternative EVM Bridge
Table of Contents

Best Crypto Bridge for Cross-Chain Swaps

In our analysis aimed at pinpointing the most effective multi-chain crypto bridges, we scrutinized over 20 protocols. The key factors considered in our assessment were the security guarantees, capital efficiency, user-friendliness and the variety of supported networks and assets. After this comprehensive assessment, we've curated a list of the top five crypto bridges, each excelling in unique features and making invaluable contributions to the evolving cross-chain ecosystem.

1. Across Protocol

Across Protocol is the best overall cross-chain bridge, facilitating quick and efficient token transfers across networks like Ethereum, Arbitrum, Polygon, Base, zkSync and other EVM-based chains. It's backed by UMA's optimistic oracle and boasts impressive stats with over $2.9 billion in total volume and over a million transactions. The platform emphasizes capital efficiency, keeping most liquidity assets securely on the mainnet, and offers a utilization-based fee model that benefits both users and liquidity providers.

What sets Across apart is its focus on safety and speed. Its optimistic design means just one honest actor is needed to dispute false claims, ensuring secure transactions. Moreover, third-party relayers vie for speed, fulfilling users' deposit requests in under a minute on average. The protocol also intelligently rebalances assets between chains every 4-8 hours for optimal efficiency. These features combine to make Across Protocol a top choice for secure, fast, and efficient cross-chain bridging.

Across Protocol Best Bridge

2. Synapse Protocol

Synapse Protocol ranks as the second-best cross-chain bridge due to its secure, flexible framework for cross-chain communication. Utilizing an Optimistic security model, Synapse ensures safe data transfers that can include anything from contract calls to NFTs. With total value locked nearing $100 million and a bridge volume over $42 billion, it's a trusted solution for millions of cross-chain transactions.

The platform sets itself apart with support for more than 16 different EVM and non-EVM blockchains. It also offers deep liquidity pools for smooth asset transfers and is developer-friendly, enabling easy integration of cross-chain functionalities into decentralized apps. Overall, Synapse offers a reliable, feature-rich option for cross-chain asset management.

3. Stargate Finance

Stargate Finance earns its spot as the third-best cross-chain bridge with nearly $386 million in total value locked. It specializes in instant, guaranteed asset transfers across multiple blockchains using its Omnichain protocol. Users and dApps benefit from diverse financial options like earning stablecoin and STG rewards through liquidity provision. The platform also accommodates a variety of long-tail stablecoins such as FRAX, LUSD, sUSD, and MAI.

What sets Stargate apart is its unique answer to the 'bridging trilemma,' a long-standing issue in the blockchain world. It offers three key features: instant transaction confirmation, native asset swapping, and a unified, cross-chain liquidity pool. This makes Stargate Finance a go-to choice for secure and seamless cross-chain financial activities.

Stargate Finance

4. Portal Bridge

Portal Bridge stands out as a top pick for cross-chain DeFi, especially for those using non-EVM chains like Solana, Sui, Sei, Aptos and NEAR. Built on Wormhole, Portal enables smooth token and NFT transfers across multiple blockchains while avoiding the headache of double-wrapping. Simply put, your original tokens get locked, and new ones appear on the destination chain.

The real advantage of Portal is its versatility in handling a range of cross-chain activities. Whether you're moving assets or developing apps that work on multiple chains, it's made easier by Wormhole's extensive toolkit. Security and decentralization are at the core, managed by a network of 19 trusted validators. So if you're looking for a reliable and user-friendly cross-chain solution for non-EVM blockchains, Portal is a strong choice.

Portal Bridge

5. Hop

Hop has carved a niche as a rollup-to-rollup token bridge, making it fifth on our list of standout cross-chain solutions. It uses Bonders, who are market makers, to provide instant liquidity. They mint special tokens called hTokens, which can be swapped instantly for native tokens on the destination chain. This makes Hop a trustless system; you can get your funds even if Bonders aren't online.

The platform also balances liquidity automatically. Automated Market Makers on each chain ensure liquidity moves to where it's most needed. Bonders contribute to this by locking up collateral that's 110% of the transfer sum. They mint hTokens at the destination chain, which add an extra security layer. After a 24-hour period, the Bonders unlock their collateral, providing a safe and efficient way to move assets between chains.


What are the Fees to Bridge Crypto?

When moving assets between different blockchains, users should keep an eye on three primary fees. First are network gas fees, which can vary based on the specific layer 1 or 2 blockchains and how busy the network is. Second, you have protocol transaction fees, which can be fixed or a percentage of the transferred amount. Finally, there's slippage, impacted by the liquidity of the specific token on your chosen platform. 

Among the cross-chain platforms, Across Protocol shines as a cost-effective choice. It offers a low base fee of 0.06%, making it 2-3 times more affordable than its closest competitor, Synapse. Moreover, Across Protocol provides the deepest liquidity, which translates to the lowest slippage, giving you more value for your money.

Are Cross-Chain Bridges Safe?

Regarding the safety of cross-chain bridges, the level of risk can differ from one protocol to another. Factors that influence this include the security of the smart contracts and the history of audits for that specific protocol. It's crucial to research these aspects to assess the level of safety you're comfortable with. Some protocols have robust security measures and a strong track record, making them more trustworthy. Always exercise due diligence to mitigate potential risks.

Final Thoughts

In summary, cross-chain bridges are indispensable tools in the current crypto landscape, enhancing interoperability and efficiency across multiple blockchain networks. After an exhaustive analysis, Across Protocol emerges as the top pick for its speed, security, and cost-effectiveness, closely followed by Synapse Protocol and others that excel in unique areas. While fees and safety measures vary, choosing the right bridge comes down to your specific needs and risk tolerance. Always conduct your own research and exercise caution to make the most out of your cross-chain transactions.