DeFi lending has matured from a niche experiment into a $75 billion market. The three protocols that built the category, Aave, Compound, and MakerDAO (now rebranded to Sky), remain the dominant players. Together they hold over $27 billion in total value locked and process billions in weekly lending volume.
Each platform takes a fundamentally different approach to the same problem: how to let people borrow and lend crypto without trusting a bank. Aave is the feature-rich powerhouse. Compound is the conservative minimalist. Sky is the stablecoin-focused yield machine.
Choosing between them depends on what you’re trying to do, how much complexity you’re comfortable with, and how much risk you’re willing to accept. This guide breaks down the differences that actually matter.
Side by Side
| Feature | Aave V3 | Compound V3 | Sky / Spark |
|---|---|---|---|
| TVL | ~$20-26B | ~$2B | ~$5.6B |
| Chains | 15+ EVM chains | Expanding multi-chain | Primarily Ethereum |
| USDC Supply APY | 3.8%-5.2% | 3%-5% | 3.9%-4.7% (via Spark) |
| Architecture | Monolithic pool | Isolated single-asset markets | CDP + lending (Aave V3 fork) |
| Flash Loans | Yes | No | No |
| Rate Switching | Variable + stable | Variable only | Governance-set |
| eMode | Yes (up to 97% LTV) | No | No |
| Safety Record | $196M bad debt from Kelp exploit | Zero bad debt from Kelp | Not exposed to Kelp |
| Governance | AAVE token | COMP token | MKR/SKY token |
| Security Track Record | 5+ years, deepest audit history | 5+ years, conservative listings | 6+ years, longest in DeFi |
| Best For | Power users, multi-chain, maximum flexibility | Conservative users, institutions, simplicity | Stablecoin yield, predictable rates |
Aave: The Everything Protocol
Aave is DeFi lending’s largest and most feature-dense platform. With $20 to $26 billion in TVL across 15+ chains, it offers the deepest liquidity pools, the widest asset selection, and tools that no competitor matches.
The flagship features set it apart. eMode lets you borrow against correlated assets at up to 97% loan-to-value, meaning $100 in stablecoins can borrow $97 in other stablecoins. Flash loans let developers borrow millions in a single transaction without any collateral, as long as the loan is repaid within the same block. Rate switching lets borrowers toggle between variable and stable rates depending on market conditions.
The multi-chain deployment is Aave’s biggest structural advantage. Whether you use Ethereum, Arbitrum, Polygon, Base, Optimism, Avalanche, or a dozen other networks, Aave is there with unified lending pools and consistent interfaces. No other lending protocol offers comparable coverage.
The trade-off is complexity and risk exposure. Aave’s willingness to list more assets and accept more collateral types means it takes on more risk. That risk materialised in April 2026 when the Kelp DAO rsETH exploit produced $196 million in bad debt that Aave’s Safety Module had to absorb. TVL dropped $6.6 billion in the aftermath. The protocol survived, the Safety Module worked as designed, and no depositor lost funds. But the event demonstrated that Aave’s broader asset coverage comes with broader risk surface.
For experienced DeFi users who want maximum flexibility, the highest yield opportunities, and access across the most chains, Aave is the clear leader. For users who want simplicity and minimal risk, it may offer more than they need.
Compound: The Conservative Choice
Compound takes the opposite approach to Aave. Fewer features. Fewer chains. Fewer assets. And a safety record that proved its value during the worst DeFi exploit of 2026.
Compound V3 moved from V2’s pooled-asset model to isolated single-asset markets. Each deployment has one base asset (usually USDC) that borrowers can borrow against multiple collateral types. The isolation simplifies risk management. If one collateral type collapses, the damage is contained to that specific market rather than spreading across the entire protocol.
That design philosophy paid off during the Kelp exploit. While Aave absorbed $196 million in bad debt, Compound’s guardian multisig froze its rsETH markets the same day and walked away with zero bad debt. The conservative collateral policy that limits what Compound lists also limits what can go wrong.
USDC supply rates on Compound run between 3% and 5%, slightly below Aave’s range. The platform doesn’t offer flash loans, eMode, or rate switching. It’s a straightforward lending and borrowing service without bells or whistles. Deposit assets. Earn yield. Borrow against collateral. That’s it.
The 5+ year security track record appeals to institutional users who need to justify their DeFi allocations to compliance teams. Compound’s conservative approach, combined with its simpler architecture, makes it easier to audit, easier to understand, and easier to explain to non-technical stakeholders.
For institutions prioritising safety above yield, for users who want “set and forget” lending, and for anyone who values Compound’s track record of avoiding every major exploit that has hit DeFi, it’s the right choice. The lower feature count isn’t a weakness. It’s the point.
Sky (MakerDAO): The Stablecoin Yield Engine
MakerDAO rebranded to Sky in late 2024, but the underlying protocol remains one of the most important systems in all of DeFi. Its lending arm, Spark Protocol, is built on Aave V3’s codebase but operates with a fundamentally different economic model.
Sky doesn’t lend USDC directly the way Aave and Compound do. Instead, users deposit collateral into vaults and mint USDS (formerly DAI), Sky’s native stablecoin. The Sky Savings Rate (SSR) pays a governance-set yield on USDS deposits, currently around 3.75% to 6% depending on parameter votes. That yield comes from the interest paid by borrowers across the Sky ecosystem rather than from variable market-driven rates.
The governance-set model provides predictability that market-driven platforms can’t match. On Aave, your USDC supply rate fluctuates block by block based on borrowing demand. On Sky, the savings rate changes only when governance votes to adjust it. For depositors who want stable, predictable returns without monitoring utilisation ratios, Sky delivers something unique.
Spark routes idle USDS into the SSR and passes the return to depositors, putting its USDC supply APY at 3.9% to 4.7%. The rate sits between Aave and Compound, with less volatility than either.
The 6+ year security track record is the longest in DeFi. The protocol has survived multiple market crashes, governance attacks, and liquidity crises without losing depositor funds. The MKR/SKY governance token controls all parameter changes, and the community has demonstrated the ability to respond to emergencies effectively throughout the protocol’s history.
Sky isn’t the right choice for users who want to lend ETH, borrow against exotic collateral, or chase the highest variable rates. It’s the right choice for users who want stablecoin yield at a governance-set rate from the most battle-tested protocol in DeFi.
The Kelp Exploit Revealed Everything
The April 2026 Kelp DAO exploit, which drained $292 million through a LayerZero bridge vulnerability, was the most important stress test DeFi lending has faced since the Terra collapse.
Aave’s broader collateral acceptance meant it held rsETH positions that became toxic when the exploit hit. The $196 million in bad debt was covered by the Safety Module, a pool of staked AAVE tokens that can be slashed to make depositors whole. The system worked. But working while absorbing $196 million in losses is different from not being exposed at all.
Compound’s conservative listing policy meant it had minimal rsETH exposure. When the exploit hit, the guardian multisig froze the relevant markets immediately. Zero bad debt. Zero depositor losses. The restrictive approach to collateral that limits Compound’s growth also limits its downside.
Sky was never exposed. Its CDP model doesn’t accept rsETH as collateral in the first place. The protocol operated normally throughout the crisis as if nothing happened.
The lesson is straightforward. More features and more assets mean more yield opportunities and more risk surface. Fewer features and fewer assets mean lower yields and lower risk. Sky’s isolated stablecoin model means the least risk but also the narrowest use case.
Which One Should You Use?
Choose Aave if you want maximum flexibility across 15+ chains, the highest variable yield opportunities, advanced features like flash loans and eMode, and you’re comfortable with the broader risk profile that comes with a larger asset universe.
Choose Compound if you prioritise safety above yield, want a simple interface without complex features, prefer isolated market architecture that contains risk, or need to satisfy institutional compliance requirements with a 5+ year unblemished safety record.
Choose Sky/Spark if you want stablecoin yield at predictable, governance-set rates rather than volatile market-driven rates. If you prefer the longest operational track record in DeFi (6+ years). Or if you want exposure to USDS, the third-largest stablecoin.
Use multiple protocols if you have enough capital to diversify across platforms. Many experienced DeFi users split their holdings: stablecoins earning yield on Sky for predictability, ETH and volatile collateral on Aave for maximum flexibility, and a conservative allocation on Compound as a safety reserve. Diversifying across protocols reduces your exposure to any single platform’s risk.
The right answer depends on what you need. All three have earned their positions at the top of DeFi lending. The differences between them are real and meaningful. Choose based on your priorities, not on which one has the highest number on a dashboard.
FAQ
Which DeFi lending platform has the highest yields?
Aave V3 generally offers the highest variable USDC supply rates at 3.8% to 5.2%, depending on chain and utilisation. Compound V3 ranges from 3% to 5%. Spark (Sky’s lending arm) offers 3.9% to 4.7%. Rates fluctuate based on borrowing demand on Aave and Compound, while Sky’s rates change only through governance votes, providing more predictability.
Which platform is safest?
Compound V3 has the strongest safety record in the current cycle, absorbing zero bad debt during the $292 million Kelp DAO exploit that cost Aave $196 million. Sky was not exposed to the exploit at all. All three have 5+ year security track records, but Compound’s conservative collateral policy and isolated market design provide the strongest protection against collateral-related failures.
Can I use all three platforms at once?
Yes. Many experienced DeFi users diversify across protocols to reduce risk. A common approach is stablecoins on Sky for predictable yield, volatile assets on Aave for maximum flexibility, and a conservative reserve on Compound for safety. Each protocol serves a different purpose, and using multiple platforms reduces your dependence on any single system.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. DeFi protocols carry smart contract risk, liquidation risk, and other risks that can result in loss of funds. Always conduct your own research before depositing assets into any protocol.
