Arbitrum Bridge vs Polygon Bridge: which fits? (2026)

Both are canonical bridges, but they serve different destinations. Arbitrum Bridge moves ETH and ERC-20 tokens between Ethereum mainnet and Arbitrum. Polygon Bridge is the standard route between Ethereum and Polygon, where it provides the official asset representation on the destination network. Neither is a general-purpose route for moving assets between arbitrary chains, so your destination is the first decision.

Arbitrum’s listed TVL is about $3.47 billion, compared with about $2.74 billion for Polygon Bridge. Those figures indicate different levels of deposited value, not a measure of safety or a guarantee that a transfer will succeed. Both have two audits listed, but neither publishes the auditors’ identities or detailed findings. Choose the bridge that matches the network you intend to use rather than treating TVL or audit counts as a decisive security ranking.

Neither bridge publishes a fee schedule. The exact cost is therefore not possible to compare from the published information. Ethereum gas is a relevant cost for Ethereum-linked transfers and can vary with network congestion; check the amount quoted in the portal or wallet before you approve a transaction. Polygon’s cited 0.50 USDC example is for a payments demo, not a bridge fee.

Arbitrum’s fee details are also not published, and no separate protocol fee is specified. Don’t assume that either option is cheaper based on its network or TVL. Your final cost depends on the transaction quote shown at the time, including any applicable network gas. Review the destination, asset, and total cost in the confirmation screen before signing.

Both bridges involve smart contracts holding pooled assets, so contract and bridge-specific risks apply. Each has two audits listed, but neither project names the auditors or provides audit findings in the information here. An audit count is not proof that a bridge is free from vulnerabilities. Public sources also do not establish a complete incident history for either bridge.

There is an important design distinction: Arbitrum is described as a rollup, with withdrawals to Ethereum subject to a challenge period. Polygon is described as a sidechain, so its security depends on its own validator set rather than inheriting Ethereum’s security alone. These are relevant considerations, not a guarantee that one bridge is safer for every user. Use the official portal, verify transaction details, and consider the risks of the destination network before transferring.

Arbitrum Bridge is reached through the Arbitrum Portal, which also points to apps and ecosystem resources. Its listed feature set is focused: two-way Ethereum–Arbitrum transfers for ETH and ERC-20 tokens. Its ease-of-use score is 8, compared with 7 for Polygon Bridge, but scores are a broad guide rather than a promise about a particular transaction.

Polygon’s Portal is described as a place to bridge, swap, and manage assets. Its wider ecosystem also lists wallet options, staking linked to POL, cross-chain liquidity tools, and chain-building and payments products. That wider set of tools may suit someone already using Polygon, though the homepage’s focus on payments and enterprise products can make bridge-specific guidance harder to find. Neither bridge publishes a fee schedule, so the practical experience still depends on the quote and route shown before you confirm.

Pick Arbitrum Bridge if your destination is Arbitrum and you want the native Ethereum–Arbitrum route. It has the higher listed ease-of-use score and TVL, supports ETH and ERC-20 transfers in both directions, and has a stated rollup withdrawal delay to keep in mind. That does not make it the right choice if you need Polygon.

Pick Polygon Bridge if you are moving assets between Ethereum and Polygon or want the bridge alongside Polygon’s portal tools for swapping and asset management. Account for its sidechain security model and the fact that reverse transfers are generally slower than deposits, with no specific timing published. For either option, compare the live quoted cost and confirm the network and asset before signing. Neither bridge is the better fit for every user; the destination network decides the basic choice.