How 1inch Fusion and MetaMask Smart Transactions differ on type, protection, rebates and what they’re built for.
| 1inch Fusion | MetaMask Smart Transactions | |
|---|---|---|
| Type | Intent DEX | Wallet feature |
| How it works | You sign an order (intent) rather than broadcasting a public tx; resolvers compete to execute it on-chain, absorbing MEV risk and often improving your price. Failed orders cost no gas. | Submits your tx to a private “virtual mempool” and auctions it to trusted builders who are financially penalized if they don’t execute at the quoted price. It stays private until confirmed. |
| Protects against | Sandwiching/frontrunning via off-chain intents | Frontrunning + failed transactions (99.9% success rate) |
| Rebates | Better execution price instead of a cash rebate | No direct rebate — back-run value funds the free service |
| Chains | Ethereum + major L2s | Ethereum, Linea, Base, Arbitrum, BNB Chain |
| Setup | Swap on 1inch with Fusion mode | Toggle on in MetaMask settings |
| Best for | Swappers who want gasless, protected trades | MetaMask users who want zero setup |
Pick 1inch Fusion for swappers who want gasless, protected trades; pick MetaMask Smart Transactions for metamask users who want zero setup.