1inch Fusion vs Paraswap: DEX Aggregator Architecture

Frequently Asked Questions

01.What is the difference between 1inch Fusion and Paraswap?

1inch Fusion is an intent-based system where users sign a gasless order and a network of resolvers competes to fill it through a Dutch auction, with the resolver paying gas and providing front-running protection. Paraswap is a classic on-chain aggregator whose Augustus router splits a trade across many decentralized exchanges in a single transaction that the user signs and pays gas for. Fusion shifts execution risk and gas to professional resolvers, while Paraswap keeps the user in direct control of an atomic on-chain route.

02.How do DEX aggregator resolvers work in 1inch Fusion?

Resolvers are whitelisted market makers, typically large stakers of the 1INCH token, who monitor signed Fusion orders and decide when the descending Dutch-auction price becomes profitable to fill. When a resolver accepts an order it sources liquidity, bundles the fill, and submits the transaction while paying gas. Competition among the top resolvers pushes execution prices toward the best available rate and provides native protection against sandwich attacks.

03.Why would a team build on a DEX aggregator instead of a single DEX?

A single decentralized exchange exposes a trade to the slippage of one liquidity source. An aggregator queries many sources, splits the order across pools, and accounts for gas cost per route, which lowers price impact on larger trades. For an integrator, building on an aggregator means inheriting that routing and the protocol's audited router contract rather than maintaining bespoke routing logic against dozens of venues.