Glossary

DeFi (Decentralized Finance)

Plain-language definition Crypto glossary

Key takeaways

DeFi, or Decentralized Finance, refers to financial services such as lending, borrowing, trading, saving, and derivatives built on blockchains and run by smart contracts instead of banks or brokers.
Each service is a set of public smart contracts that users interact with directly from their own wallets, and because anyone can build on top of them, DeFi products are often called composable money legos.
DeFi makes financial services permissionless, globally accessible, and transparent on-chain, but that same openness brings risks such as smart-contract bugs and volatile collateral.

Definition

DeFi, short for decentralized finance, refers to financial applications, such as lending, borrowing, trading and earning yield, built on public blockchains using smart contracts instead of traditional intermediaries like banks or brokerages. Users typically interact directly with these protocols through a wallet rather than opening an account with a company.

Why it matters

DeFi removes some traditional gatekeepers, but it replaces institutional risk with smart contract risk and, often, a steep learning curve: a bug in a protocol’s code, a poorly designed incentive, or a user error interacting with a contract can result in permanent loss of funds with no customer support to appeal to. Yields offered by DeFi protocols can also be far more volatile and less predictable than traditional finance products.

Example

Staking and lending yields across different networks are a common DeFi activity; see current comparative data on our staking yields page.

This is educational information, not financial advice. Coingsty does not recommend buying or selling any asset.

FAQ

Frequently asked questions

How is DeFi different from traditional finance?

Traditional finance routes services through banks and brokers that hold your funds and act as intermediaries, while DeFi runs the same kinds of services through public smart contracts you interact with directly from your wallet. This makes DeFi permissionless and transparent, but it also removes the intermediaries that would otherwise absorb certain risks.

What does composable or money legos mean in DeFi?

Because DeFi smart contracts are public, anyone can build new products that plug into existing ones, stacking services together like building blocks. This composability is why DeFi protocols are often described as money legos.

Is DeFi risky?

DeFi carries real risks including smart-contract bugs, volatile collateral, and the fact that you are responsible for your own funds with no intermediary to call. Its openness and transparency are strengths, but they do not remove these risks, so this is educational information and not financial advice.