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MEV Blocker vs CoW Swap

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

MEV BlockerCoW Swap
TypePrivate RPCBatch-auction DEX
How it worksRoutes 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.Orders settle in batches at one uniform clearing price, chosen by competing solvers, with Coincidence-of-Wants matching — removing the ordering advantage MEV bots exploit. Same team as MEV Blocker.
Protects againstFrontrunning & sandwiching on any Ethereum dAppSandwiching/frontrunning via uniform-price batch auctions
RebatesUp to 90% of back-run value, auto-depositedPrice surplus returned to you
ChainsEthereumEthereum, Gnosis, Arbitrum, Base
SetupAdd RPC rpc.mevblocker.io to your walletTrade on CoW Swap
Best forEveryday wallets that want rebatesSpot swaps that want best price + protection

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

CoW Swap

  • MEV-protected by design (batch auctions)
  • Coincidence-of-Wants can beat AMM price
  • Gasless limit orders
  • Swaps only, not arbitrary transactions
  • Batch settlement adds some delay

Bottom line

Pick MEV Blocker for everyday wallets that want rebates; pick CoW Swap for spot swaps that want best price + protection.