Arbitrum Bridge vs Base Bridge: Which route fits? (2026)

Both bridges are described as canonical routes: each is the native option for moving assets between Ethereum and its respective layer 2. Arbitrum Bridge serves Ethereum and Arbitrum, while Base Bridge serves Ethereum and Base. They are not interchangeable; the destination chain and support for your asset should decide which one you use.

Public sources put Arbitrum Bridge at about $3.47 billion in TVL and Base Bridge at about $3.03 billion. Those figures indicate substantial usage, but they do not establish that either bridge is safe or suitable for every transfer. Arbitrum's review describes ETH and ERC-20 transfers in both directions. Base's review says it supports certain assets and data, so check whether your particular token is eligible before sending it.

Neither of our reviews publishes bridge fee amounts. Arbitrum's review says fees are not published and notes that bridging normally involves Ethereum gas on the originating or settlement side and a small fee on Arbitrum. Base's review also says bridge fees are not published and notes that deposits start on Ethereum, where network gas applies. In both cases, check the current estimate in the bridge interface or wallet before signing.

Base documentation is described as saying that transactions on Base cost less than one cent. That is a statement about transactions on the destination chain, not the cost of bridging funds to Base. It should not be used as a direct comparison of bridge costs. Public sources also do not establish which bridge is cheaper overall, since actual costs depend on current network conditions and the transfer.

Public information shows two audits for Arbitrum Bridge, but does not name the auditors or summarize their findings. It lists no audits for Base Bridge and does not describe its security model or upgrade controls. That difference gives Arbitrum more audit information in this data, but it does not prove that one bridge is safe or the other unsafe.

Both bridges rely on smart contracts that hold assets, so contract risk applies. Their reported TVLs also mean each holds a large pool of value, which can attract attackers. Arbitrum withdrawals to Ethereum follow the rollup challenge period and are not instant; the Base review does not publish withdrawal timings. Use the official bridge interface, check transaction details before signing, and avoid transferring more than you are prepared to risk.

Arbitrum Bridge supports ETH and ERC-20 tokens and is accessible through the Arbitrum Portal, which also points users to ecosystem resources. Its ease-of-use score is 8/10. The review characterizes its two-way transfers as a core feature, but does not provide a published fee schedule or details of the audits.

Base Bridge is covered in the Base documentation quickstart and has an ease-of-use score of 7.5/10. Its description includes transfers of certain assets and other data between Ethereum and Base. Public information shows no bridge token is needed, but gives no complete asset list. In practical terms, the easiest choice is usually the canonical bridge for the chain you want to reach, provided it supports the asset and timing you need.

Choose Arbitrum Bridge if your destination is Arbitrum and you need to move ETH or an ERC-20 token between it and Ethereum. It has the higher TVL and two audits listed, though the audit details are unavailable. Be prepared for the challenge period when withdrawing to Ethereum, and check the transaction's fee estimate before confirming.

Choose Base Bridge if you want to reach Base and your asset is among those it supports. Its canonical status, documentation quickstart and lack of a required bridge token may suit users who want Base's native route. However, Public information shows no audits and does not publish bridge fees or withdrawal timings. Neither option is a universal winner: destination, asset support and your tolerance for the information gaps should guide the decision.