Compound

Compound is one of the oldest lending protocols in DeFi and much of the category's vocabulary comes from it. V3, the version on Base, moved away from the original pooled design: each deployment has a single borrowable asset with other tokens accepted only as collateral.

That narrows what the protocol can do and narrows the risk with it, since collateral assets are never lent out and cannot be borrowed against each other. Compound runs on ten chains, and Base is a modest deployment compared with its Ethereum presence.