ETHLend launched as an early Ethereum-based, peer-to-peer crypto lending project. Its LEND token sale began in late November 2017, funding development of decentralized lending tools built with smart contracts.
The ETHLend token sale closed in December 2017, completing the project’s initial fundraising phase. This marked the end of the first “startup” stage and set the foundation for later protocol redesign and rebranding.
ETHLend rebranded to Aave in September 2018. The change also signaled a strategic pivot away from pure peer-to-peer matching toward designs meant to make borrowing and lending more reliable at scale.
After rebranding, Aave shifted from a lender-borrower marketplace to a liquidity pool approach, where users deposit assets into shared pools and borrowers draw from them. This model reduced the friction of finding a matching counterparty and helped the protocol support broader, always-available liquidity.
Aave’s pool-based protocol (commonly called Aave V1) launched on Ethereum mainnet in January 2020. The launch established Aave as a production, on-chain money market where users could supply assets to earn interest and borrow against collateral.
Aave V1 introduced flash loans, a type of uncollateralized loan that must be borrowed and repaid within a single blockchain transaction. This capability became a widely used DeFi building block for tasks like arbitrage and refinancing, while also increasing the importance of robust risk controls.
In 2020, Aave introduced the Safety Module, a staking-based backstop designed to improve protocol protection in the event of a shortfall (when the protocol cannot fully cover obligations). This helped connect protocol risk management to token-based incentives and governance design.
Aave initiated a major governance and token redesign by migrating from the LEND token to the AAVE token at a 100:1 ratio. The new token design supported updated governance and staking-related mechanics, helping align protocol control and safety incentives.
Aave transferred protocol admin control to token-holder governance, reducing reliance on a central team for upgrades. This governance step mattered because it changed how protocol parameters and future migrations could be authorized and executed.
Aave released V2 in December 2020, adding features aimed at safer and more flexible borrowing. Key upgrades included collateral swaps and “repay with collateral,” plus improved flash loan mechanics and other efficiency changes for users managing risk and gas costs.
After V2 proved stable, Aave published an official migration tool to help users move positions from V1 to V2 in a coordinated way. This operational step supported adoption of V2’s upgraded risk and capital-efficiency features without requiring users to manually close and reopen positions.
In March 2021, Aave introduced an AMM market that accepted certain decentralized-exchange liquidity provider (LP) tokens, expanding the kinds of collateral users could employ. Around the same time, Aave activated Governance V2, strengthening on-chain governance mechanics such as delegation and the “Guardian” role.
Aave deployed on Polygon in April 2021, addressing Ethereum mainnet congestion by offering lower transaction costs. This expansion made the protocol accessible to smaller users and supported higher-frequency activity like rebalancing and refinancing positions.
In May 2021, an Aave governance proposal updated the incentive configuration tied to the Safety Module, reflecting ongoing tuning of token emissions and risk backstops. This marked a “stabilization” phase after the ETHLend-to-Aave migration and the V1-to-V2 upgrade cycle, with governance maintaining protocol protection as Aave scaled.
Aave's migration from ETHLend and protocol upgrades (2017–2021)