How MetaMask Smart Transactions and 1inch Fusion differ on type, protection, rebates and what they’re built for.
| MetaMask Smart Transactions | 1inch Fusion | |
|---|---|---|
| Type | Wallet feature | Intent DEX |
| How it works | 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. | 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. |
| Protects against | Frontrunning + failed transactions (99.9% success rate) | Sandwiching/frontrunning via off-chain intents |
| Rebates | No direct rebate — back-run value funds the free service | Better execution price instead of a cash rebate |
| Chains | Ethereum, Linea, Base, Arbitrum, BNB Chain | Ethereum + major L2s |
| Setup | Toggle on in MetaMask settings | Swap on 1inch with Fusion mode |
| Best for | MetaMask users who want zero setup | Swappers who want gasless, protected trades |
Pick MetaMask Smart Transactions for metamask users who want zero setup; pick 1inch Fusion for swappers who want gasless, protected trades.