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Flashbots Protect vs MEV Blocker

How Flashbots Protect and MEV Blocker differ on type, protection, rebates and what they’re built for.

Flashbots ProtectMEV Blocker
TypePrivate RPCPrivate RPC
How it worksSends your transaction privately to the Flashbots block-building auction. MEV-Share selectively shares hints so searchers can bid to back-run it, sharing the profit with you.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 againstFrontrunning, sandwiching & failed-tx revertsFrontrunning & sandwiching on any Ethereum dApp
Rebates90% of back-run MEV + gas-fee refundsUp to 90% of back-run value, auto-deposited
ChainsEthereumEthereum
SetupAdd RPC rpc.flashbots.net to your walletAdd RPC rpc.mevblocker.io to your wallet
Best forThe conservative, battle-tested defaultEveryday wallets that want rebates

Flashbots Protect

  • Most battle-tested private RPC
  • MEV-Share back-run rebates (90%) + gas refunds
  • Permissionless — no API key
  • Ethereum mainnet only
  • Back-run-only sharing today

MEV Blocker

  • Largest adoption (4.5M+ wallets)
  • Up to 90% back-run rebates, auto-paid
  • Protects on any dApp once set as RPC
  • Ethereum mainnet only
  • Rebate size depends on searcher competition

Bottom line

Pick Flashbots Protect for the conservative, battle-tested default; pick MEV Blocker for everyday wallets that want rebates.