# Aggregator

> A service that scans many DEXes or lending markets to find you the best rate.

Canonical URL: https://fudfomo.co/glossary/aggregator
Source: What The Block! Dictionary v1.0 (last updated 2026-04-25), browsable at https://wtb.fudfomo.co.

## Definition

An aggregator is a tool that searches across multiple protocols on your behalf. A DEX aggregator splits a large trade across several exchanges to get the best price; a yield aggregator routes deposits into the lending protocol or vault paying the highest rate.

Aggregators can save real money on big transactions, but they add another contract between you and the underlying protocol. The savings have to be weighed against that extra layer of risk.

## Related terms

- [DEX](https://fudfomo.co/glossary/dex): A decentralised exchange. Trade crypto directly from your wallet, without an account.
- [DeFi](https://fudfomo.co/glossary/defi): Decentralised finance. Apps that offer lending, trading, and saving on a blockchain instead of through a bank.
- [Vault](https://fudfomo.co/glossary/vault): A DeFi smart contract that automates a strategy on behalf of depositors.
- [Slippage](https://fudfomo.co/glossary/slippage): The gap between the price you expected when you placed a trade and the price you actually got.

## See the full catalogue

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