At a glance
Aave ↗ is the undisputed leader in DeFi lending, holding roughly $32B in net deposits across 13 chains and generating annualized revenue north of $230M. Spark Protocol ↗ is a smaller $4B money market, forked from Aave v3 and deeply integrated with the Sky (formerly Maker) ecosystem. Aave is built for general-purpose lending with maximal chain coverage and liquidity; Spark targets participants who already hold DAI or USDS and want predictable, governance-controlled borrow rates. The choice between them hinges largely on whether you need the broadest market access or a streamlined experience inside the Sky orbit.
Key differences
The most glaring difference is scale. Aave commands $32B in total deposits versus Spark's $4B, and Aave’s footprint spans Ethereum, Arbitrum, Optimism, Base, Polygon, Avalanche, BNB Chain, Scroll, Metis, Gnosis, ZKsync Era, Linea, and Sonic — 13 chains — while Spark operates only on Ethereum, Gnosis, and Base. Aave’s revenue model is diversified: reserve factors on borrows, liquidation penalties, and GHO interest all flow to the Aave DAO, which buys back and distributes AAVE tokens. Spark, by contrast, is a subsidiary of Sky/Maker, with tokenomics tied to the SPK token and fee parameters set by Sky governance. Product-wise, Aave offers GHO (its own $260M+ stablecoin), the Horizon institutional platform, and an in-progress V4 hub-and-spoke architecture. Spark’s flagship is SparkLend, a single-borrow-asset market that provides USDS and DAI lending at rates managed by Sky, plus the Spark Liquidity Layer that routes capital across chains. In essence, Aave is a self-contained profit engine; Spark is a lending extension of the Sky stablecoin ecosystem.
Security and track record
Aave has survived multiple market cycles since 2017 without a catastrophic exploit. It has been audited by Trail of Bits, OpenZeppelin, and Certora, among others, and its V3 contracts have been battle-tested by billions in TVL. Spark launched in 2023 as an Aave v3 fork and has undergone audits by ChainSecurity and Cantina, but has a shorter operational history and a smaller attack surface due to fewer chains. While both protocols list zero known incidents in our database, Aave’s longer track record and more extensive audit history give it an edge in perceived security. Users should note that Spark’s dependence on Sky’s governance adds an additional layer of systemic risk.
Fees and costs
Aave's fees are market-driven: borrow rates vary by asset utilization, with reserve factors skimming 10-35% to the DAO, and liquidation penalties of 5-10% on underwater positions. Spark's fees are set by Sky governance and are currently engineered to offer predictable, often subsidized rates for DAI and USDS borrows. No directly comparable fee schedule is disclosed in our data, but Spark’s rates are generally designed to be competitive for stablecoin borrowers within its ecosystem. For the most current comparative rates, users should check each protocol’s native dashboard or aggregators like DeFiLlama.
Which should you choose
Pick Aave if you need the deepest liquidity, access to the widest range of chains and assets, and want exposure to protocol revenue via AAVE staking. Aave is the default choice for most DeFi users and institutions that aren't specifically tied to a single stablecoin. Pick Spark if you are already a Sky (Maker) user, hold DAI or USDS, and want a lending market whose rates reflect Sky’s monetary policy. Spark’s tighter integration can offer a simpler UX and lower execution risk if your activity is centered on the Sky stablecoin complex.
Verdict
For the vast majority of users, Aave wins on scale, security, and revenue capture. Spark is a competent but niche alternative that excels only when your portfolio already revolves around the Sky/Sky ecosystem. Unless you have a clear reason to borrow DAI/USDS at managed rates, Aave is the superior lending protocol.