Last Updated: March 2026
1inch is a DEX aggregator that splits trades across multiple decentralized exchanges to find the best prices and lowest slippage. Instead of trading on one DEX, 1inch routes your swap through several simultaneously.
History
1inch was founded in 2019 by Sergej Kunz and Anton Bukov, who built the first version at an ETH New York hackathon. The pitch was simple: instead of users picking a single DEX and hoping for the best price, 1inch would route a single swap across multiple DEXs simultaneously to capture the deepest liquidity and best price. The 1INCH token launched via a retroactive airdrop in December 2020 — one of the more substantial airdrops of that cycle.
1inch has since expanded from a Uniswap-style aggregator into a full DeFi infrastructure suite: aggregation, limit orders, the Fusion intent-based protocol, an in-house wallet, and a Layer-2-aware liquidity network. It runs across Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Base, Avalanche, zkSync Era, and others.
How 1inch Works
- Aggregation Protocol: The core router. Splits a single swap across many DEXs (Uniswap, Sushiswap, Curve, Balancer, etc.) using a graph-search algorithm called Pathfinder to find the lowest-slippage path
- Fusion: Intent-based swaps. The user signs a desired outcome (“I want X for at least Y”); professional resolvers compete to fill it, often via gasless meta-transactions
- Limit Order Protocol: Fully on-chain limit orders with conditional fills (stop-loss, RFQ, MEV-protected) — used as infrastructure by other DEX frontends
- 1inch Wallet: Mobile and browser wallet with built-in aggregation and Fusion routing
Tokenomics
1INCH: 1.5B total supply. Distribution: 30% community incentives, 22.5% network growth fund, 14.5% team, 11.5% advisors and investors, ~11% reward distribution, ~6% protocol development, ~4.5% other.
Utility:
- Staking: Lock 1INCH as st1INCH to earn protocol fee accrual via the Fusion resolver auctions
- Governance: Stake-weighted voting on the DAO (treasury allocation, fee parameters, listings)
- Resolver collateral: Resolvers in the Fusion protocol must stake 1INCH to participate; bad behavior is slashable
See our tokenomics guide.
Use Cases
- Best-price swaps: The default use — get a better price than any single DEX by splitting orders
- Gasless DeFi (Fusion): Resolvers pay gas; users sign once. Especially valuable on Ethereum mainnet
- MEV protection: Fusion auctions resist sandwich attacks because resolvers compete on outcome, not transaction order
- Limit orders without exchange custody: Set a target price; the order sits on-chain until filled
Pros and Cons
- Pro: Consistently best execution price across major chains — the aggregator most other aggregators benchmark against
- Pro: Fusion’s intent model is a meaningful UX upgrade (gasless, MEV-resistant)
- Pro: Real fee accrual via Fusion resolver auctions — st1INCH is closer to “productive” than most DEX tokens
- Pro: Multi-chain footprint reduces single-chain risk
- Con: Intense competition from other aggregators (Jupiter on Solana, OpenOcean, Matcha, ParaSwap) and direct DEX frontends
- Con: 1INCH token has historically struggled to capture value despite Fusion improvements
- Con: Resolver concentration risk — a small group of professional resolvers handles most Fusion volume
Frequently Asked Questions
What does 1inch do that a regular DEX doesn’t?
A regular DEX (Uniswap, Sushiswap, etc.) is a single liquidity pool. 1inch is a router — when you swap on 1inch, it splits your order across many DEXs in a single transaction to find the lowest-slippage path. For large swaps the price improvement vs. any single DEX is meaningful, often dwarfing the small aggregator fee.
Is 1INCH a good investment?
1INCH is a bet on aggregation remaining the default execution layer for DeFi. The thesis improved when Fusion launched (real fee accrual to stakers), but the token has historically underperformed peer governance tokens. Risks: relentless aggregator competition, value capture difficulties, and resolver concentration. See our DeFi projects guide.
What is Fusion and why does it matter?
Fusion is 1inch’s intent-based swap protocol. Traditional swaps: user picks the exact transaction; pays gas; bots sandwich them. Fusion: user signs “I want X for at least Y”; professional resolvers compete to fill the order, typically off-chain with their own gas. The user gets a gasless, MEV-protected swap; the resolver earns a fee. It’s the same intent-architecture pattern UniswapX, CoW Swap, and other newer DEXs have adopted.
Is 1inch safe?
The core 1inch contracts have been audited extensively (CertiK, Consensys Diligence, Chainsulting, OpenZeppelin) and operate at scale across many chains with no major exploit of the router itself. The standard caveats apply: token approvals can be abused if you sign an unlimited allowance to a compromised dApp; always check approvals via revoke.cash periodically.
