Euler Finance Review 2026: Modular Ethereum Lending Protocol

Euler Finance is a permissionless lending and borrowing protocol built on Ethereum. Sources describe it as a modular platform, where users can lend crypto assets to earn interest or borrow against collateral without an intermediary approving the loan.

The project presents itself as a credit layer for programmable finance, and its web app offers borrowing against existing collateral. Several sources also refer to the EUL token and a token sale.

Most of the detailed write-ups in the sources reviewed are from 2022, and the project's homepage could not be retrieved for this review. Treat the details here as a starting point and confirm current markets, fees and risks on the project's own site.

Euler Finance is a lending protocol on Ethereum. Lenders deposit a crypto asset into a pool, and borrowers take loans from that pool by posting other assets as collateral. The interest a borrower pays is shared with the lenders who supplied the funds.

The protocol is described as modular. Instead of one shared pool for every asset, separate lending markets can be set up with their own assets, collateral choices and risk settings. This lets the protocol support a wider set of tokens, though each market carries its own risk.

Because borrowing needs collateral, each loan must stay above a minimum collateral level. If the value of the collateral drops below that level, the position can be liquidated, and the borrower loses part of the collateral to repay the debt. Lending rates change with supply and demand in each market.

The sources reviewed do not publish a fee schedule for Euler Finance. Borrowing and lending costs usually include interest rates set by each market and Ethereum network transaction fees, which vary with network congestion.

Users would see rates and costs inside the app before confirming a transaction. Check those figures for the specific market you use.

The sources reviewed do not confirm any third-party audit reports, a bug bounty programme or a full record of security incidents for Euler Finance. Check the project's own documentation and independent audit databases before depositing funds.

With a self-custody wallet, you hold your own keys, but the protocol's smart contracts still hold your deposits. A contract bug, an oracle failure or a sharp price drop can cause losses, and lending positions can be liquidated.

The sources do not state a licence or regulatory status. Crypto lending is not a regulated savings product in most places, so check the rules where you live. DeFi products are for adults who can afford to lose what they deposit, and it is wise to limit exposure and to get independent advice if you are unsure.

Euler Finance is aimed at crypto users who already hold Ethereum assets and want to lend them for interest or borrow against them. It is less suited to beginners who have not yet learned how collateral ratios and liquidations work.