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Shutter Network vs Flashbots Protect

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

Shutter NetworkFlashbots Protect
TypeEncrypted mempoolPrivate RPC
How it worksTransactions are encrypted with threshold cryptography and only decrypted after they’re committed to a block, hiding intent from searchers entirely. Bringing encrypted txs to Ethereum PBS with Primev.Sends 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.
Protects againstFrontrunning & censorship via threshold encryptionFrontrunning, sandwiching & failed-tx reverts
RebatesN/A — prevention by encryption90% of back-run MEV + gas-fee refunds
ChainsEthereum (PBS-bound), Gnosis ChainEthereum
SetupUsed via integrating apps / keypersAdd RPC rpc.flashbots.net to your wallet
Best forApps that need intent-hiding + censorship resistanceThe conservative, battle-tested default

Shutter Network

  • Strongest intent-hiding (encryption, not just privacy)
  • Also resists censorship
  • Protocol-level approach via PBS
  • Not a simple wallet RPC yet
  • Adds latency from encrypt/decrypt

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

Bottom line

Pick Shutter Network for apps that need intent-hiding + censorship resistance; pick Flashbots Protect for the conservative, battle-tested default.