Linea Bridge vs Optimism Bridge: which route fits? (2026)

Both are canonical bridges, but they serve different layer 2 ecosystems. Linea Bridge is the standard route between Ethereum and Linea. It also brings several funding methods into one place: an aggregator for routes from other chains, direct transfers from centralized exchanges and a fiat on-ramp. Those extras make it more flexible if your funds are not already on Ethereum.

Optimism Bridge is focused on the canonical Ethereum-to-OP Mainnet route. Base and PGN appear in its broader OP Stack ecosystem listing, but the core bridge description is specifically about OP Mainnet. Its TVL is about $523.6 million, compared with about $224.9 million for Linea Bridge. TVL shows the amount held through a bridge, not a guarantee of safety or a measure of how quickly your transfer will complete.

Linea Bridge labels its native Ethereum-to-Linea route as having no fees. That describes the bridge charge, not necessarily the full transaction cost: Ethereum gas may still be payable. Fees for Linea’s aggregator, exchange transfer and fiat purchase options are not published, and those services may have separate charges or terms.

Optimism Bridge does not publish a fee schedule. Users generally pay gas on the source network, so an Ethereum deposit includes Ethereum gas, which varies with network congestion. The wallet or gateway shows an estimated cost before confirmation. Third-party bridges and aggregators can add their own fees, separate from a canonical route. Compare the final quote shown for the specific route and asset you intend to use; do not assume the no-fee label on Linea applies to every funding option.

Neither bridge has audits listed, and neither project publishes audit details here. That does not establish that either bridge has or has not been audited; it means you should look for current reports in the projects’ official documentation. Both depend on smart contracts and their respective layer 2 networks, so contract bugs or network failures can put bridged assets at risk.

Linea Bridge links to a bug bounty and a security section. Its native route uses your wallet, while exchange, aggregator and purchase options involve third parties with their own custody arrangements, fees and terms. Optimism’s bridge risk also depends on the rollup’s proof system; its security guidance points users to information about the current fault proof system. Verify the official site before connecting a wallet, and consider the risks before sending funds.

Linea is the better fit if you want a range of ways to get funds into the Linea ecosystem. Its native bridge is straightforward for Ethereum-to-Linea transfers, while the aggregator, exchange transfers and fiat on-ramp can help when you are starting elsewhere or funding a wallet through another method. The trade-off is that fees for those extra services and withdrawal times are not published.

Choose Optimism Bridge if your destination is OP Mainnet and you want its canonical Ethereum route. Optimism describes OP Mainnet as a lower-cost layer 2, but withdrawing back to Ethereum involves a challenge period and is slower than depositing. Its larger TVL may be useful context, but it should not decide the choice by itself. Start with the destination chain, then compare the quoted costs and withdrawal requirements for your transfer.