Linea is an Ethereum Layer 2 zk-rollup. It uses zero-knowledge proofs to bundle transactions and settle them on Ethereum, keeping fees low while staying fully EVM-compatible so existing wallets and contracts work unchanged.
Straight into the app: Swap ETH · Buy ETH · Get UCASH with ETH
ZK Rollup (settles to Ethereum). Settlement on U.CASH is non-custodial: every payment moves on-chain, direct to a wallet you control. Confirmation policy for Linea: Credited once the L2 transaction is confirmed; deeper finality when the zk-proof settles on Ethereum..
A single U Account works across accept, swap, and buy. Pick where to start.
Take ETH in checkout alongside cards on 35 networks. White-label, non-custodial, live in minutes.
Trade ETH for any asset across the network, routed for the best price.
Get ETH with any asset you hold, one step, settled to your wallet.
Receive, hold, and settle ETH your way.
Tokens you can swap, accept, and settle on this network.
The leading smart-contract blockchain and home of ERC-20.
Ethereum L2 built on the OP Stack.
Leading Ethereum L2 by activity.
EVM sidechain built for fast, cheap payments.
DeFi-focused OP Stack Ethereum L2.
Modular Ethereum L2 with fast, cheap blocks.
Getting started takes a wallet and an address. The wallet needs to hold Linea and a little ETH for gas on its chain; the address is where the output lands, raw hex or a resolvable web3 name both work. From there the flow is preview-first: what leaves, what arrives, the fee, and the network cost all sit on one screen before a signature happens. Keys never leave your side at any point, and the only thing the wallet ever signs is the exact transaction you read.
The cost picture is two lines. The platform side is a flat 0.50% all-in on the swap, quoted before you sign, with no spread and no routing cut behind it. The network side is gas paid in ETH, settling with about 1 sec blocks on ZK Rollup (settles to Ethereum), which the preview itemizes per leg. Settlement is on-chain to the address you chose: Credited once the L2 transaction is confirmed; deeper finality when the zk-proof settles on Ethereum. on this asset, after which the balance is spendable and non-custodial in the fullest sense, yours to move with no platform in the path.
The route runs on the aggregated DEX route, and atomicity is the property that matters: the approved number either happens in full or the transaction reverts with nothing moved but the attempt's gas. There is no resting state between legs where value sits in someone else's hands, and a route that misses your bounds simply fails clean, ready for a fresh quote. Cheap and loud beats silent and expensive as failure modes go.
One account unlocks accept, swap, buy, and the rest of the U.CASH network across 35 networks.