Aggregator
A DeFi service that searches multiple protocols to find better prices, routes, or yields for a user’s transaction.
An aggregator in DeFi is a tool or protocol that pulls information from many decentralized exchanges, lending markets, or yield platforms and helps users choose the best available option. Instead of checking each protocol manually, a user can rely on the aggregator to compare prices, liquidity, fees, and possible routes for a transaction. The most common example is a DEX aggregator, which splits or routes a token swap across several exchanges to try to reduce slippage and improve the final amount received.
Aggregators matter because DeFi liquidity is often spread across many separate platforms. By scanning those sources at once, they can make trading or moving funds more efficient and easier to understand. For example, swapping ETH for a stablecoin through one exchange may produce a worse rate than using an aggregator that routes part of the trade through two or three exchanges. Users still need to review network fees, smart contract permissions, and transaction details, because an aggregator simplifies access but does not remove risk.
Other terms in DeFi
AMM
An automated market maker is a DeFi protocol that uses liquidity pools and algorithms to price and swap crypto assets without a traditional order book.
DEX
A decentralized exchange is a crypto marketplace where users trade directly from their wallets using smart contracts instead of a central intermediary.
DeFi
A blockchain-based financial ecosystem that lets people lend, borrow, trade, and earn yield without traditional banks or brokers.
Flash Loan
A flash loan is an uncollateralized DeFi loan that must be borrowed and repaid within the same blockchain transaction.