What Is 1inch? DeFi Aggregator, Fusion Mode & 1INCH Token Explained

Over time, 1inch has expanded beyond basic DEX aggregation. Its ecosystem now includes Fusion for intent-based, gasless swaps, Fusion+ for cross-chain execution, a Limit Order Protocol, the 1inch Wallet, and the 1INCH governance token.

For traders, the main reason to use 1inch is straightforward: you keep control of your wallet while letting the protocol search for a better way to execute the trade.

Key Takeaways

• 1inch is a DEX aggregator, not a standalone decentralized exchange. It searches multiple liquidity sources and can split trades to improve execution.

• Pathfinder is 1inch’s routing system, deciding how a swap should move through different DEXs and pools.

• Fusion changes how a swap is executed. Users sign an order while professional resolvers compete to fill it and cover gas costs, helping protect the trade from harmful MEV.

• Fusion+ extends intent-based execution across blockchains, allowing users to swap between supported networks without manually using a conventional bridge.

• 1INCH is the ecosystem’s governance and utility token. Its total supply is capped at 1.5 billion tokens.

• 1inch is most useful for users already holding assets in a self-custody wallet. A centralized exchange such as Gate may still be simpler for fiat deposits, centralized order-book trading, and other exchange services.

What Is 1inch?

1inch began in 2019 after Sergej Kunz and Anton Bukov built the original aggregator at an ETHGlobal hackathon. The idea addressed a basic problem in DeFi: the same token pair can trade at slightly different prices across different decentralized exchanges.

Imagine you want to swap 10 ETH for USDC.

If you go directly to one DEX, your entire order is executed using the liquidity available there. For a larger swap, that can create more price impact.

1inch can instead search available routes and determine that a better outcome might be:

6 ETH → Uniswap → USDC

3 ETH → Curve → USDC

1 ETH → another liquidity source → USDC

The user still sees and approves one transaction, while 1inch handles the routing in the background.

1inch is also non-custodial. Your assets remain controlled by your wallet until the swap is executed through smart contracts.

How Does 1inch Find Better Swap Routes?

The routing technology behind 1inch is commonly known as Pathfinder.

Rather than simply checking which DEX shows the lowest token price, the system considers factors such as:

• available liquidity;

• price impact;

• potential intermediate tokens;

• different DEXs and pools; and

• transaction costs.

This matters because the most obvious route is not always the best route.

Suppose you want to swap Token A into USDC, but the direct Token A/USDC pool has very little liquidity.

Pathfinder may determine that:

Token A → ETH → USDC

produces more USDC than the direct route.

It can also split a trade across several liquidity sources when doing so improves execution. 1inch’s own documentation specifically highlights transaction splitting as one of the advantages of aggregation over trading through a single DEX.

For the user, the key number is not how complicated the route is. It is how many tokens you are expected to receive after the trade.

Classic Swap vs. Fusion: What’s the Difference?

1inch currently offers different ways to execute swaps, and understanding Classic versus Fusion is more useful than knowing every protocol component in the ecosystem.

Classic Swap

A Classic swap works much like an ordinary on-chain DEX transaction.

You:

1. connect your wallet;

2. select the tokens;

3. review the route and quote;

4. approve the token if necessary; and

5. submit the blockchain transaction.

Your wallet pays the network gas fee.

Classic swaps are useful when you want direct execution and control over the transaction.

Fusion

Fusion uses an intent-based model.

Instead of sending the swap directly to a DEX, the user signs an order describing what they want to exchange. Professional participants known as resolvers then compete to fill that order.

Resolvers cover the blockchain gas required to settle the transaction. This means the user does not need to hold the chain’s native gas token specifically to execute a Fusion swap. (⁠1inch Help Center)

Fusion is also designed to reduce harmful MEV exposure because the user’s trade is not executed in the same way as a conventional public-mempool swap.

A simplified example:

You want to exchange 1 ETH for USDC.

With Classic, 1inch calculates a route and you send the swap yourself.

With Fusion, you effectively tell the network:

I want to sell 1 ETH and receive at least this amount of USDC.

Resolvers compete to provide an acceptable execution.

That shifts part of the routing and gas complexity away from the user.

What Is Fusion+?

Fusion+ applies the same intent-based idea to cross-chain swaps.

Suppose you have USDC on Arbitrum but want ETH on Base.

Traditionally, that might involve:

USDC → bridge → Base → swap USDC for ETH

Fusion+ aims to package that process into a single user request.

The user specifies what they have on the source chain and what they want on the destination chain. Resolvers handle the execution required to complete the cross-chain swap.

This is different from manually selecting and interacting with a conventional bridge.

However, “cross-chain” should not be interpreted as risk-free. Users are still relying on smart contracts, resolver infrastructure and the mechanics used to coordinate settlement between networks.

1inch vs. Using a DEX Directly

The practical difference comes down to choice of liquidity.

Using 1inch does not mean it will always produce a dramatically better price.

For highly liquid, small trades, the best route may simply be one Uniswap pool.

Aggregation becomes particularly useful when the trade is larger, liquidity is fragmented, or several venues offer materially different execution.

What Is the 1INCH Token?

1INCH is the governance and utility token of the 1inch ecosystem. The token is used in 1inch governance and staking-related systems.

Users can stake 1INCH to receive Unicorn Power, which can be used for governance or delegated within the ecosystem. 1inch introduced this model alongside Fusion as part of a broader redesign of its tokenomics and governance.

The important distinction for investors is that using 1inch does not require buying the 1INCH token.

A trader can use the aggregation protocol to swap assets without holding 1INCH.

Buying 1INCH is therefore a separate decision involving exposure to the token’s market price and its governance or ecosystem utility.

Is 1INCH a Good Investment?

Someone evaluating 1INCH should separate the success of the 1inch product from the investment case for the 1INCH token.

1inch can process significant DeFi activity without that automatically translating into a higher token price.

Factors investors may consider include:

• adoption of 1inch’s aggregation and Fusion products;

• relevance of 1INCH in governance;

• staking and delegation utility;

• competition from other aggregators and intent protocols;

• overall DeFi trading activity; and

• token demand relative to circulating supply.

The token also carries the same market volatility and regulatory uncertainty as other crypto governance assets.

The better question is therefore not simply:

“Is 1inch a good platform?”

but:

“Does growth in the 1inch ecosystem create meaningful demand or utility for 1INCH?”

Those are different questions.

What About the 1inch Wallet?

The 1inch Wallet is a self-custody wallet that integrates the company’s swap technology directly into a mobile interface.

1inch currently says the wallet supports swaps across 13+ chains, including Ethereum, BNB Chain, Polygon, Optimism, Arbitrum, Base, Linea, zkSync Era, Solana and others. (

It can be useful if you want:

• self-custody;

• built-in 1inch swaps;

• multi-chain asset management;

• custom transaction controls; and

• Ledger integration.

But you do not need to use the 1inch Wallet to use 1inch. Compatible external Web3 wallets can also connect to the 1inch interface.

How to Use 1inch

For someone using 1inch for the first time, the process is relatively straightforward.

1. Fund a Web3 Wallet

You need crypto in a self-custody wallet on a supported network.

For example, you could buy ETH or USDC through an exchange such as Gate and withdraw it to an Ethereum, Base or Arbitrum wallet.

Check the blockchain network carefully when withdrawing.

2. Open the Official 1inch Interface

Connect a compatible wallet and select the blockchain containing your assets.

3. Choose the Tokens

Select the asset you want to sell and the asset you want to receive.

For example:

ETH → USDC

1inch will calculate an available route and expected output.

4. Review the Quote

Check:

• expected tokens received;

• price impact;

• network;

• slippage settings; and

• whether you’re using Classic or Fusion where available.

5. Approve and Confirm

If the smart contract does not already have permission to use the token, your wallet may request an approval first.

Then sign or confirm the swap.

The 1inch Swap API itself follows the same broad process: check allowance, approve if necessary, request a quote and execute the swap.

Is 1inch Safe?

1inch is established DeFi infrastructure, but using it is not risk-free.

Smart-Contract Risk

Swaps rely on smart contracts, and bugs or vulnerabilities can never be ruled out completely.

Token Approval Risk

Approving a contract gives it permission to interact with tokens in your wallet. Review approvals carefully and avoid unfamiliar websites pretending to be 1inch.

Underlying Liquidity Risk

1inch routes trades through third-party liquidity sources. The aggregator may therefore interact with other protocols during execution.

Token Risk

A good swap route cannot protect you from buying a fraudulent, illiquid or collapsing token.

Cross-Chain Risk

Fusion+ simplifies cross-chain execution, but moving value between blockchains introduces additional technical dependencies.

For new users, starting with a small transaction can help confirm the network, wallet and workflow before moving a larger amount.

1inch vs. Gate: When Would You Use Each?

1inch and Gate are not direct substitutes.

1inch is useful when you:

• already have crypto in a self-custody wallet;

• want to trade directly on-chain;

• want liquidity aggregated from multiple DEXs; or

• want to use Fusion or cross-chain DeFi execution.

Gate may be more suitable when you:

• want a centralized exchange account;

• need fiat or other supported payment services;

• prefer order-book spot trading;

• trade futures or other centralized products; or

• do not want to manage wallet approvals and DeFi transactions.

A user can also use both.

For example:

Buy USDC on Gate → withdraw to Base → connect wallet to 1inch → swap into an on-chain token.

Conclusion

1inch solves a straightforward problem in DeFi: liquidity is spread across many decentralized exchanges, and manually finding the best route is inefficient.

Its aggregation protocol searches across liquidity sources and can split or reroute trades when that improves execution. Fusion goes a step further by allowing resolvers to compete to fill user orders while covering gas costs, and Fusion+ extends that model to cross-chain swaps.

For ordinary users, the distinction is simple:

Use 1inch when you want to trade from your own wallet while taking advantage of aggregated on-chain liquidity.

The 1INCH token is a separate part of the ecosystem, used for governance and staking-related functionality rather than being required for ordinary swaps.

Whether you’re using Classic, Fusion or Fusion+, the same DeFi rules still apply: verify the website, check token approvals, understand the network you’re using and review the final amount received before confirming a transaction.

FAQ

Is 1inch a DEX?

1inch is primarily a DEX aggregator, rather than a single DEX with one set of liquidity pools.

What is 1inch Fusion?

Fusion is an intent-based swap system where resolvers compete to execute user orders and cover gas costs. It is also designed to protect users from harmful MEV. (⁠1inch Help Center)

Do I need 1INCH tokens to use 1inch?

No. Users can make supported swaps without owning the 1INCH token.

What does the 1INCH token do?

1INCH is used for governance and ecosystem utility. Users can stake it to receive Unicorn Power for governance and delegation.

Is 1inch custodial?

No. 1inch is designed around self-custody, with transactions executed from users’ connected wallets.