What Is Euler (EUL)?
Euler is a decentralized lending protocol built for flexibility. Instead of offering a one-size-fits-all market, it lets anyone create isolated, customizable lending and borrowing vaults for any ERC-20 token on Ethereum. Each vault can run on its own rules—complete with a unique interest rate model, price oracle, and risk settings—so that if one vault faces trouble, others stay unaffected.
At its core, Euler aims to make decentralized lending safer and more adaptable, putting power back in the hands of users and developers. Governance is handled by holders of the EUL token, who can propose and vote on protocol changes, treasury use, and upgrades.
How Euler Works
The Euler Vault Kit (EVK)
The Euler Vault Kit (EVK) is the protocol’s foundation—a smart contract toolkit for building lending markets. Every vault follows the ERC-4626 tokenized vault standard, which standardizes deposits, withdrawals, and yield distribution across DeFi.
Using the EVK, creators can build anything from fully governed lending pools to self-managed vaults or yield-optimizing markets. Each vault connects to its own oracle for price data and uses a dynamic Interest Rate Model (IRM) that adjusts rates based on liquidity and demand.
A “controller” smart contract enforces borrowing and collateral rules, ensuring system stability and protecting users from cascading failures.
The Ethereum Vault Connector (EVC)
The Ethereum Vault Connector (EVC) is what makes Euler’s system truly modular. It links multiple vaults together, allowing users to use collateral in one vault to borrow from another—without merging risks.
For example, you could post ETH as collateral in one vault and borrow USDC from another, all in a single transaction. The EVC checks each vault’s parameters to ensure your collateral remains secure, improving both efficiency and safety.
Vault Types on Euler
Euler supports several types of vaults to match different risk profiles:
- Escrowed Collateral Vaults: Hold collateral without generating yield—ideal for users focused on borrowing power rather than returns.
- Governed Vaults: Managed by DAOs or curators who set risk parameters and loan terms.
- Ungoverned Vaults: Fully automated with fixed parameters, offering more autonomy but higher self-management responsibility.
- Yield Aggregator Vaults: Pool user deposits and distribute them across multiple strategies for optimized returns.
Euler Earn: Passive Yield, Simplified
Euler Earn acts as a yield aggregator built on the ERC-4626 standard. It automatically allocates user deposits across various lending markets and external yield sources managed by risk curators.
Deposits remain non-custodial, meaning users always retain ownership of their assets. Each Earn vault manages its own queues for deposits and withdrawals, keeping liquidity accessible even during high demand.
Anyone can launch an Earn vault using the EulerEarn Factory smart contract—no coding required.
The EUL Token and Governance
EUL is the governance and utility token that powers Euler. Its key functions include:
- Governance: Token holders vote on proposals, upgrades, and treasury allocations.
- Fee Auctions: Protocol fees are periodically auctioned in exchange for EUL, with proceeds going to the DAO treasury.
- Incentives: Active users and contributors can earn EUL rewards.
- Treasury Management: The DAO can burn, redistribute, or reinvest tokens to support ecosystem growth.
Binance Airdrop and Listing
On October 13, 2025, Binance announced EUL as the 51st project on its HODLer Airdrops program. Users who locked their BNB in Simple Earn or On-Chain Yields products between October 4–6 received part of 543,657 EUL tokens (2% of total supply).
EUL is now tradable on Binance under the Seed Tag, paired with USDT, USDC, BNB, FDUSD, and TRY.
Why It Matters
Euler’s modular design brings a new level of customization and risk management to DeFi lending. With isolated markets, composable vaults, and integrated yield tools like Euler Earn, it gives developers and users alike the ability to shape their own credit ecosystems—securely and transparently.
