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