What is Aave (AAVE)? A Plain-English Explainer
Aave is a decentralized lending protocol where users supply and borrow crypto. Learn how it works, what AAVE is used for, and the main risks.
Key points
- Aave is a decentralized lending protocol where users supply crypto to earn interest and borrow against collateral.
- AAVE is the protocol's governance token, used to vote on changes and, in some cases, to back the system.
- Aave has faced market stress and criticism over liquidation risks and centralization concerns.
What is Aave?
Aave is a decentralized lending protocol that runs on blockchains, primarily Ethereum. It lets users deposit cryptocurrency into pools and earn interest, while others borrow from those pools by posting collateral. The protocol is non-custodial: users keep control of their funds through smart contracts, and there is no central company approving loans. AAVE is the protocol’s governance token. As of September 29, 2026, Aave’s circulating supply is 15,433,016 AAVE, and its market-cap rank is 37.
How Aave works in plain language
Think of Aave as a set of automated money markets. Each market is for a specific asset, such as ETH or a stablecoin. Users called suppliers deposit assets into a market and receive interest-bearing tokens that represent their share. Borrowers must first deposit collateral, then they can take out a loan in a different asset. The amount they can borrow depends on the collateral’s value and a loan-to-value ratio set by the protocol.
Interest rates are not set by a committee. They adjust automatically based on how much of each pool is borrowed. When a pool is heavily used, rates rise to attract more deposits; when demand is low, rates fall. This is done through smart contracts on-chain.
Collateral, liquidations, and health factor
If the value of a borrower’s collateral falls too close to the value of their loan, the position becomes risky. Aave uses a health factor to measure this. If the health factor drops below 1, part of the collateral can be liquidated: a liquidator repays some of the debt and receives collateral at a discount. This protects suppliers but can be costly for borrowers.
Flash loans and rate modes
Aave is known for popularizing flash loans: uncollateralized loans that must be borrowed and repaid within a single blockchain transaction. If the loan is not repaid, the whole transaction is reversed. Aave also offers stable and variable interest rate options for borrowers, though stable rates can be rebalanced under certain conditions.
What is AAVE used for?
AAVE is the governance token of the Aave protocol. Holders can propose and vote on changes, such as adding new assets, adjusting risk parameters, or upgrading contracts. In some versions, AAVE also acts as a backstop: a portion of the protocol’s safety module can be staked to help cover shortfalls in extreme events, with stakers earning rewards and risking slashing. AAVE is not required to use the lending protocol itself.
Notable history
Aave was launched in 2017 as ETHLend, an early peer-to-peer lending project, and rebranded to Aave in 2018. The protocol introduced flash loans and later expanded to multiple blockchains, including Polygon, Avalanche, and others. In 2022, Aave launched Aave V3, which added features like efficiency mode and isolation mode to manage risk more flexibly. Aave has also been involved in discussions about real-world assets and institutional lending pools. These developments are well documented in the project’s public history.
Main risks and criticisms
- Smart contract risk: Bugs or exploits in the protocol’s code could lead to loss of funds. While Aave has been audited, no code is risk-free.
- Liquidation risk: Borrowers can lose collateral if prices move against them. Liquidations can happen quickly in volatile markets.
- Oracle risk: Aave relies on price feeds to value collateral. If an oracle is manipulated or fails, it can cause unfair liquidations or bad debt.
- Governance centralization: Although AAVE is a governance token, a small number of large holders can influence votes. This has been a common criticism of many DeFi projects.
- Regulatory uncertainty: Lending protocols face evolving rules in different countries, which could affect access or operations.
Critics also point out that high yields can attract risky behavior, and that liquidations may disproportionately affect smaller borrowers during market stress.
How Aave compares with alternatives
Aave is one of several decentralized lending protocols. Compound is a close competitor with a similar pooled model. MakerDAO focuses on borrowing its stablecoin DAI against collateral. Venus and JustLend are prominent on other blockchains. Aave’s distinguishing features include flash loans, multiple rate modes, and a multi-chain strategy. Compared with centralized lenders, Aave offers transparency and non-custodial control, but it also puts more responsibility on users to manage risk.
| Protocol | Key feature | Governance token |
|---|---|---|
| Aave | Flash loans, multi-chain, rate modes | AAVE |
| Compound | Simple pooled lending | COMP |
| MakerDAO | Stablecoin DAI, collateralized debt | MKR |
| Venus | Lending on BNB Chain | XVS |
What to watch
For users, the key is to understand collateral ratios, interest rates, and liquidation thresholds before borrowing. For observers, Aave’s governance votes and risk parameters are public and can be tracked on-chain. As of September 29, 2026, Aave remains a major DeFi protocol by market-cap rank, but its risks are real and should not be ignored.
Disclaimer: This article is for information only and is not investment, financial or trading advice. Cryptocurrency prices are highly volatile. Always do your own research.
