1inch
1inch is a DEX aggregator with a Swap interface (intent-based Fusion and cross-chain Fusion+) and a Pro interface that routes across DEXes. The interface is free to use; some swaps carry infrastructure fees.
Cost: 1inch charges no interface fee. A swap costs network gas on Pro, Solana, small and native-token swaps, plus any infrastructure fee applied at the API-provider level. Rates for that infrastructure fee are not published on the help page, so the exact cost per swap cannot be stated. Fusion swaps are usually gasless because resolvers pay gas. A $1,000 buy-and-sell costs about $0.00 in 1inch fees.
Checked 2026-10-16 · sources below- Round trip fee
- 0% buy + sell, platform fee
- $1,000 buy + sell
- $0.00 before network + pool fees
- US availability
- Available UK: unverified · EU: available
- Custody
- non-custodial
- KYC
- none
- Platforms
- web
- Launched
- 2019-05
Users paid 1inch about $68K in fees in the 30 days to 2026-10-17 (DefiLlama) — a rough measure of how much it is actually used.
Best for: EVM and Solana traders who want aggregated routing and gasless intent-based swaps without an interface fee.
1inch fees
| Fee | Type | Rate | Applies to | Note |
|---|---|---|---|---|
| Interface fee | platform | 0% | Buy and sell | Terms (updated 2026-09-14): 'Access to the Interface is currently made available by 1inch without charge.' |
| Infrastructure fee | other | — | Buy and sell | Applied on certain swaps at the infrastructure level. Paid by the taker on Swap/limit orders and by the user on DEX-aggregator routing. |
| Swap surplus | other | — | Buy and sell | Positive slippage handling is set by the API provider; 1inch Business keeps it. |
| Network gas | network | — | Buy and sell | Paid by the user on Pro (aggregator) swaps, small swaps, Solana swaps and swaps from native tokens; otherwise covered by resolvers. |
How DEX fees work: instead of a platform fee, each swap pays the fee of the pool it routes through (listed above where published). The interface itself may add its own fee.
Platform fees only. On-chain network/priority fees, pool (LP) fees and price impact are extra and vary by trade.
Is 1inch legit?
Terms: 'The Products are strictly non-custodial.' Users connect self-custodial wallets.
Backers: Binance Labs, Dragonfly Capital, Galaxy Digital and others (Seed) ($2,800,000), 2020-08; Pantera Capital, ParaFi Capital, Nima Capital (Series A) ($12,000,000), 2020-12; Amber Group, Jane Street, VanEck and others (Series B) ($175,000,000), 2021-12.
Incidents on record
- 2024-10-31: Supply-chain attack on 1inch Swap (Avalanche). DefiLlama lists a $723,000 Frontend & Infrastructure supply-chain attack tagged to 1inch Swap on Avalanche. No further details were found in a primary source. Source
- 2025-03-05: Fusion v1 resolver exploit. An attacker exploited a calldata-corruption bug in obsolete Fusion v1 resolver contracts and took about $5M from resolvers, mainly the market maker TrustedVolumes. Most funds were returned, with the attacker keeping about $450,000 as a white-hat fee. 1inch said no end-user funds were at risk. Source
Where 1inch is available
| Region | Status |
|---|---|
| United States | Available |
| United Kingdom | Unverified |
| European Union | Available |
Terms say access is not restricted by country, 'including for users located in the United States, Europe or Asia', except sanctioned jurisdictions and persons. Some features may be unavailable in some US states. UAE users can only view and exit positions. (source)
We report what the venue's own terms say. Don't use a VPN to get around restrictions; venues can freeze accounts that do.
Pros and cons
Pros
- Terms state the interface is currently provided without charge.
- Fusion swaps are usually gasless for the user because resolvers pay gas.
- Terms explicitly say access is not restricted for users in the United States or Europe, outside sanctions.
- The homepage lists 17 named networks including Ethereum, Base, Arbitrum and Solana.
Cons
- Some swaps carry infrastructure fees whose rates are not published on the help page.
- A $5M exploit hit obsolete Fusion v1 resolver contracts in March 2025, mostly recovered; 1inch said no user funds were at risk.
- Gas is still charged on Pro swaps, Solana swaps and swaps from native tokens.
- No user referral program was found.
Features
limit orderscross-chain swapsgasless swapsmobile appMEV protection
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Head to head
Where 1inch ranks
- #1 in Cheapest Solana trading platformsof 10
- #1 in Cheapest way to trade Pump.fun coinsof 10
- #1 in Lowest-fee crypto trading appsof 10
- #4 in Best DEX aggregatorsof 4
- #7 in Crypto trading venues available in the EUof 10
- #9 in Best Solana DEXes and aggregatorsof 9
Explainers related to 1inch
- What is a DEX? (decentralized exchange explained, and DEX vs CEX)
- What is MEV? (sandwich attacks and how they cost swap traders)
1inch FAQ
Is 1inch legit?
1inch is a non-custodial DEX aggregator that raised a $175M Series B in December 2021, per DefiLlama. Its terms state it never takes custody of user assets. In March 2025 an exploit of obsolete Fusion v1 resolver contracts took about $5M from resolvers, most of it later returned.
Does 1inch charge fees?
1inch's terms say the interface is free. Some swaps include infrastructure fees, and you pay network gas on Pro swaps, Solana swaps and swaps from native tokens.
Is 1inch Fusion gasless?
The Fusion FAQ says users pay no gas to execute a swap outside fast mode. Resolvers pay the transaction costs.
Is 1inch available in the US and UK?
The terms say access is not restricted for users in the United States, Europe or Asia, except sanctioned persons and jurisdictions. Some features may be unavailable in some US states. The UK is mentioned only as a sanctions authority.
Sources
Last checked . Fees and terms change often; the venue's own page wins if it disagrees with ours.
- 1inch homepage — checked 2026-10-16
- 1inch Terms of Use (last updated 2026-09-14) — checked 2026-10-16
- 1inch Help: Do I pay fees when using 1inch? — checked 2026-10-16
- 1inch Help: Fusion FAQ — checked 2026-10-16
- 1inch Help: Restricted territory — checked 2026-10-16
- 1inch Help: What countries does the 1inch interface support? — checked 2026-10-16
- DefiLlama: 1inch Network — checked 2026-10-16
- DefiLlama: Hacks dashboard — checked 2026-10-16
- rekt.news: 1inch — checked 2026-10-16
- Wikipedia: 1inch (founding date, funding rounds) — checked 2026-10-16