Compound Finance: DeFi Lending OG Guide 2026
The protocol that invented algorithmic money markets · +120 XP · 10 min read
What is Compound?
Compound Finance is one of the original DeFi protocols, launching in 2018. It created the first algorithmic interest rate model for crypto lending: supply assets to earn yield, borrow against collateral with rates that adjust automatically based on utilization.
The latest Compound III (Comet) architecture shifted to single-asset borrowing markets: each market has one borrowable asset (e.g. USDC) and accepts multiple collateral types. This simplifies risk management and reduces gas costs compared to V2's multi-asset model.
Compound V2 vs V3 (Comet)
| Feature | V2 | V3 (Comet) |
|---|---|---|
| Borrow | Any asset | Single base asset per market |
| Collateral | Multi-asset → multi-borrow | Multi collateral → one borrowable |
| cTokens | Yes (cETH, cUSDC...) | No — uses internal accounting |
| Gas | Higher | ~40% cheaper |
| Risk | Cross-contamination possible | Isolated per market |
| COMP Rewards | Supply + Borrow | Borrowers only (base asset) |
$COMP Governance
$COMP is Compound's governance token. Holders propose and vote on protocol upgrades, parameter changes, and asset listings. Compound pioneered the DeFi governance model — every protocol parameter is controlled by $COMP holders, including interest rate models, collateral factors, and reserve factors. A proposal needs 25,000 COMP to be submitted and must pass a 3-day voting window.
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Frequently Asked Questions
What is Compound Finance?▾
Compound Finance is a DeFi lending protocol launched in 2018 that created the first algorithmic interest rate model. Users supply crypto assets to earn yield, or borrow against collateral with rates that adjust automatically based on pool utilization.
What is the difference between Compound V2 and V3?▾
Compound V3 (Comet) uses single-asset borrowing markets — each market has one borrowable asset and accepts multiple collateral types. V2 allowed multi-asset borrowing but had higher gas costs and cross-contamination risk.
How do I earn yield on Compound?▾
Supply supported assets (USDC, ETH, WBTC, etc.) to a Compound market. You earn interest automatically based on the market's utilization rate. Higher utilization = higher supply APY.
What is $COMP used for?▾
$COMP is Compound's governance token. Holders propose and vote on protocol upgrades, parameter changes, and new asset listings. A proposal needs 25,000 COMP to be submitted.