Aave vs Compound Lending

Protocol Overview

Aave launched in 2020 as a successor to ETHLend and has grown into the largest DeFi lending protocol by total value locked. Aave V3, the current version, is deployed across Ethereum, Polygon, Arbitrum, Optimism, Avalanche, Base, and other networks. It supports dozens of assets and offers features like flash loans, efficiency mode (eMode) for correlated assets, isolation mode for new assets, and the ability to switch between stable and variable rates. Compound launched in 2018 and pioneered the cToken model (interest-bearing receipt tokens). Compound III (Comet) represents a fundamental redesign, moving from a pooled model to isolated markets where each deployment has one borrowable asset and multiple collateral types. Compound is primarily deployed on Ethereum and a few other chains, with a more focused approach than Aave's broad multi-chain strategy.

Rates and Fees Comparison

Both protocols use algorithmic interest rate models where rates adjust based on utilization. Aave uses a two-slope model with a kink point: rates increase gradually below optimal utilization and spike sharply above it, incentivizing deposits when pools are heavily borrowed. Compound III uses a similar utilization-based model but applied per market. In practice, rates for major assets like USDC and ETH are often similar across both protocols, as arbitrageurs balance supply and demand. Aave charges a flash loan fee of 0.05%. Neither protocol charges platform fees on standard lending and borrowing beyond the interest rate spread. Both distribute governance tokens (AAVE and COMP) as additional incentives, though the value of these rewards fluctuates with token prices. For the best current rates, check both dashboards directly or use aggregation tools like DeFiLlama.

Feature Comparison

Aave offers more advanced features. Flash loans allow uncollateralized single-transaction borrowing. Efficiency mode (eMode) enables higher LTV for correlated asset pairs like stETH/ETH. Isolation mode allows governance to list new assets with capped exposure, limiting risk to the broader protocol. Portals enable cross-chain liquidity movement. Rate switching lets borrowers move between stable and variable rates. Aave also supports debt tokenization through variable and stable debt tokens. Compound III takes the opposite approach: simplicity. Each Comet market focuses on one borrowable asset with clean, predictable behavior. This makes Compound III easier to understand and potentially safer through risk isolation. Compound III also allows suppliers to earn interest without enabling their assets as collateral, giving users more control. For developers, Compound's simpler architecture may be easier to integrate.

Risk Models

Aave manages risk through multiple mechanisms. The Safety Module is a staking system where AAVE holders can stake tokens to backstop the protocol; if a shortfall event occurs, up to 30% of staked AAVE can be slashed to cover losses. Each asset has individually configured risk parameters including LTV, liquidation threshold, and liquidation bonus. Aave uses Chainlink oracles for price feeds. Gauntlet and Chaos Labs provide ongoing risk analysis and parameter recommendations. Compound III isolates risk by market: a failure in one Comet deployment does not affect others. Each market has its own set of collateral assets and risk parameters. Compound uses Chainlink oracles and has an active governance process for risk parameter adjustments. Both protocols have been extensively audited and have operated for years without critical exploits of their core contracts, establishing strong track records.

Which Should You Choose?

Choose Aave if you want the broadest asset selection, multi-chain presence, advanced features like flash loans and eMode, and the largest liquidity pools. Aave is the go-to for sophisticated DeFi users who need flexibility and composability. Choose Compound III if you prefer simplicity, cleaner risk isolation, and a focused lending experience. Compound III's single-borrowable-asset model is easier to understand and may be safer for users focused on specific markets. For most users, the practical choice depends on which assets you want to lend or borrow, which chain you are on, and the current rates. Diversifying across both protocols reduces single-protocol risk. Both are tier-one DeFi protocols with strong teams, governance, and security track records.