How MetaMask Smart Transactions and MEV Blocker differ on type, protection, rebates and what they’re built for.
| MetaMask Smart Transactions | MEV Blocker | |
|---|---|---|
| Type | Wallet feature | Private RPC |
| 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. | Routes your transaction through a searcher auction instead of the public mempool; searchers bid for the right to back-run it and rebate up to 90% of the profit to you automatically. |
| Protects against | Frontrunning + failed transactions (99.9% success rate) | Frontrunning & sandwiching on any Ethereum dApp |
| Rebates | No direct rebate — back-run value funds the free service | Up to 90% of back-run value, auto-deposited |
| Chains | Ethereum, Linea, Base, Arbitrum, BNB Chain | Ethereum |
| Setup | Toggle on in MetaMask settings | Add RPC rpc.mevblocker.io to your wallet |
| Best for | MetaMask users who want zero setup | Everyday wallets that want rebates |
Pick MetaMask Smart Transactions for metamask users who want zero setup; pick MEV Blocker for everyday wallets that want rebates.