Last Updated: March 2026
Compound is one of DeFi’s founding protocols — pioneering algorithmic interest rates for lending and borrowing crypto. It inspired the entire DeFi lending sector and introduced the concept of governance token distribution (yield farming).
History
Compound Finance was founded in 2017 by Robert Leshner and Geoffrey Hayes, launching mainnet in September 2018. It was one of the first algorithmic money markets — alongside Aave (then ETHLend) and MakerDAO — that defined what “DeFi lending” would look like. The COMP token launched in June 2020 via the first major liquidity mining program: users earned COMP for both borrowing and supplying, which kicked off the “DeFi Summer” of 2020.
Compound v3 (codenamed Comet) launched in 2022 with a fundamentally different design: instead of multi-asset pools where any asset can borrow any other, each Comet deployment isolates a single borrowable asset (e.g., USDC) and accepts multiple collateral types. The architecture trades flexibility for safer risk parameters and tighter capital efficiency. Compound runs on Ethereum, Arbitrum, Base, Polygon, Optimism, and Scroll.
How Compound Works
- Algorithmic interest rates: Rates adjust automatically based on utilization. High utilization → high borrowing APR → attracts more lenders → rate normalizes. No order book, no intermediaries
- cTokens (v2) / position accounting (v3): In v2, supplying USDC mints cUSDC, which appreciates against USDC as interest accrues. In v3 (Comet), positions are tracked directly, simplifying integration
- Overcollateralized borrowing: Borrowers must post collateral worth more than they borrow (typical loan-to-value: 70–85%). If the collateral value drops below threshold, liquidators repay the loan and seize collateral at a discount
- COMP distribution: Block rewards still distributed to suppliers and borrowers in active markets, though at much lower rates than the 2020 peak
Tokenomics
COMP: 10M hard cap. Distribution: 4.23M to liquidity mining (community), 2.4M to shareholders, 2.23M to founders/team (4-year vest), 775k to community governance, 372k to future team members.
Utility:
- Governance: COMP holders propose and vote on every protocol parameter — supported assets, collateral factors, interest-rate curves, reward distribution. Compound was the first DeFi protocol to fully on-chain governance via COMP
- Delegation: Holders can delegate their voting power without giving up custody
- Liquidity mining: Active markets distribute COMP to suppliers and borrowers
COMP intentionally has no fee-accrual mechanism — it is a pure governance token. See our tokenomics guide.
Use Cases
- Yield on idle stablecoins: Supply USDC/DAI/USDT to earn supply APY without taking smart-contract risk on smaller protocols
- Leveraged long: Borrow stablecoins against ETH or wBTC collateral to buy more of the collateral asset
- Treasury management: DAOs and corporates use Compound v3’s isolated USDC markets to earn yield on operating treasuries
- Interest-rate exposure: Compound rates are a benchmark used by other protocols and structured products
Pros and Cons
- Pro: Battle-tested since 2018, never an exploit of the core protocol
- Pro: Comet (v3) isolated-asset design has tighter risk parameters than legacy multi-asset pools
- Pro: Most rigorous on-chain governance in DeFi — every parameter change passes through COMP voting
- Pro: Hard-capped supply with predictable, fully-vested emissions
- Con: Aave has eaten most of Compound’s market share (broader asset list, faster product velocity, fee accrual to stakers)
- Con: COMP has no direct fee accrual — pure governance token in a market that increasingly rewards productive tokens
- Con: Slower product iteration than competitors due to the governance-first philosophy
Frequently Asked Questions
What’s the difference between Compound and Aave?
Both are algorithmic money markets but with different design philosophies. Aave supports a wider asset list, more aggressive features (flash loans, GHO stablecoin, isolation mode, efficiency mode), and AAVE has fee accrual via stkAAVE. Compound is more conservative: smaller asset list, single-asset isolated markets in v3, and COMP is pure governance with no fee switch. Aave has grown faster; Compound has had fewer parameter incidents.
Is COMP a good investment?
COMP is one of the original “DeFi blue chip” governance tokens, with a hard-capped supply and battle-tested protocol. The bear case: it captures no protocol revenue (intentionally), and Aave has out-executed on product. The bull case: any future fee-switch activation would re-rate the token, and the conservative design reduces tail risk vs. faster-moving competitors. See our DeFi projects guide and the AAVE comparison.
How do liquidations work on Compound?
Every borrower has a health factor derived from collateral value, borrow value, and the collateral factor (LTV cap) of each asset. If collateral price drops or borrow accrues interest until the health factor falls below 1, anyone can call the liquidation function. The liquidator repays a portion of the debt and receives the borrower’s collateral at a 5–10% discount. This keeps the protocol solvent even in fast market moves.
What does cTokens vs Comet mean?
Compound v2 used cTokens — supply USDC, receive cUSDC, which appreciates as interest accrues (1 cUSDC = X USDC where X grows over time). v3 (Comet) abandoned this in favor of direct position accounting per address — simpler for integrators, eliminates the exchange-rate dust issues that plagued cTokens. Both versions still operate; new deployments are Comet.
