aave.com

One-line introduction

aave.com is a decentralized lending protocol running on Ethereum and other blockchains. Developed and maintained by the Swiss company Aave, it is one of the leading projects in DeFi (decentralized finance). Users can deposit crypto assets to earn interest or collateralize assets to borrow other tokens, all without traditional banks or intermediaries.

Business overview

Aave’s core service is a permissionless crypto-asset lending market. Users deposit tokens such as USDC, ETH, and DAI into the protocol’s liquidity pools to earn variable or stable annualized yields. At the same time, they can overcollateralize assets to borrow other tokens for leveraged trading, arbitrage, or liquidity management. Aave originally launched in 2017 under the name ETHLend, rebranded to Aave in 2020, and released its v1 version before later iterating to v2 and v3. Today, v3 is the mainstream version. In terms of market position, Aave has long ranked among the top three DeFi lending protocols, with total value locked (TVL) exceeding tens of billions of dollars at its peak. Its users include crypto investors, quantitative trading teams, DeFi developers, and institutional liquidity providers worldwide, mainly active on Ethereum, Polygon, Avalanche, Arbitrum, and other public blockchains.

Who it’s for

Aave is best suited to three types of users. First, individual crypto holders who want to earn 2%-8% annualized interest on idle assets while retaining the flexibility to withdraw at any time. Second, professional traders or DeFi yield farmers who need to quickly borrow assets for arbitrage, farming, or hedging. Third, developers or project teams that can use Aave’s smart contract interfaces to build new DeFi products, such as Flash Loan functionality. For corporate users, if they hold large amounts of USDC or ETH and are willing to take on smart contract risk, Aave may offer higher annualized returns than traditional CeFi platforms. However, Aave is not suitable for conservative investors seeking risk-free returns, nor for ordinary users unfamiliar with crypto wallet operations.

Key features and highlights

• Deposit and borrow to earn interest: Deposit assets to earn a supply rate, with rates dynamically adjusted based on borrowing demand. Depositors can withdraw principal at any time.
• Overcollateralized lending: Users must deposit collateral worth more than the loan amount, typically 1.2-1.5 times the borrowed value. Borrowing rates are determined by market supply and demand.
• Flash Loans: Borrow any amount within a single transaction without collateral, provided the principal plus fee is repaid in the same transaction. Mainly used for arbitrage, liquidations, and refinancing.
• Variable and stable rates: Borrowers can choose variable rates, which fluctuate with the market, or stable rates, which are locked for a period, allowing more flexible cost control.
• Multi-chain deployment: Supports more than 7 public blockchains, including Ethereum mainnet, Polygon, Avalanche, Arbitrum, and Optimism, enabling users to operate across chains.
• Security mechanisms: The protocol has been audited by multiple security firms and includes a Safety Module, where users can stake AAVE tokens to provide additional protection.

Pricing analysis

Aave itself has no monthly or annual subscription fees; all costs come from fees and interest generated by lending transactions. Depositors do not pay protocol fees and earn net interest. Borrowers pay interest, with rates dynamically adjusted by algorithms based on capital utilization, typically ranging from 2%-20%. In addition, Flash Loans charge a 0.09% fee per transaction. Compared with traditional CeFi platforms such as Binance lending, Aave’s rates fluctuate more, but there are usually no hidden fees, and all rates are displayed in real time on the protocol front end. Overall, Aave’s cost is moderately low because the decentralized protocol removes intermediary markups, though users must pay their own Gas fees. These are relatively high on Ethereum mainnet and lower on sidechains such as Polygon. For high-frequency traders, Gas fees may become the main cost.

How Chinese users can use it

Accessing Aave from mainland China requires a VPN or similar circumvention tool, as its official website and front-end interface are blocked. Network reliability depends on the quality of the user’s VPN, but the protocol itself runs on the blockchain; as long as users can connect to an Ethereum RPC node, they can interact with it. In terms of payment methods, Aave does not support direct fiat deposits. Users must first purchase USDT or ETH through an exchange such as OKX or Binance, withdraw it to a wallet such as MetaMask, and then deposit it into the Aave protocol. As for invoices, Aave is a decentralized protocol and does not provide traditional invoices, though on-chain transaction hashes can serve as proof of activity. There are currently no direct domestic alternatives, as decentralized lending falls into a gray area under China’s legal framework, so users must bear compliance risks themselves. Using sidechains such as Polygon or Arbitrum is recommended to reduce Gas fees.

Pros and cons

Pros:

• ✅ Market leader with deep liquidity and support for many asset types, over 20 in total.
• ✅ No KYC required; any address globally can use it.
• ✅ Transparent deposit rates, viewable in real time, with no lock-up period.
• ✅ Powerful Flash Loan functionality, suitable for advanced DeFi users.
• ✅ Multi-chain deployment helps reduce the impact of high Ethereum Gas fees.

Cons:

• ❌ Requires a VPN or similar access method, making it less user-friendly for Chinese users.
• ❌ Smart contracts carry security risks, and minor vulnerabilities have appeared in the past.
• ❌ The overcollateralization model leads to low capital efficiency, making it hard for ordinary users to borrow large amounts.
• ❌ Ethereum mainnet Gas fees are expensive, so small transactions are often uneconomical.
• ❌ No invoices are available, making accounting difficult for business users.

Comparison with similar products

Aave’s main competitors include Compound (COMP) and MakerDAO (DAI). Compound is also a decentralized lending protocol, but its features are simpler: it mainly supports deposits and borrowing, without Flash Loans or broad multi-chain support, and its interest rate model differs slightly. MakerDAO focuses on the issuance of the DAI stablecoin, with a more specialized lending function but a broader range of collateral types. In comparison, Aave has a slight edge in feature depth, including Flash Loans, stable rates, and multi-chain support, as well as in liquidity scale. However, Compound’s codebase is simpler and has a longer audit history. For Chinese users, all three require proxy access and none supports direct fiat deposits.

Conclusion and recommendation

Aave is suitable for crypto holders with a basic understanding of DeFi, especially users who want to earn passive income from idle assets or conduct leveraged operations. If you hold ETH or USDC and are willing to accept smart contract risk, you can try depositing a small amount to experience the interest rates. It is not suitable for scenarios where you need direct fiat deposits, seek zero-risk returns, or are a beginner unfamiliar with wallets and Gas fee management. It is recommended to start with a small amount on Polygon or Arbitrum, become familiar with the workflow, and then consider larger allocations on Ethereum mainnet.