mempool.ink
Independent · fact-checked June 2026

Protect your transactions from MEV

Bots watch the public mempool and sandwich your trades. This is an independent comparison of the private RPCs, wallet features and protected DEXes that stop them — and pay some of the value back to you.

9Services
6Head-to-heads
7Guides
FreeTo use
Live mempool ⛽ ETH gas…gwei ₿ BTC pending…txs ₿ next block…sat/vB via mempool.space & public RPC
ServiceTypeProtects vsRebateChainsBest for
MMEV Blocker Private RPC Frontrunning ↩ up to 90% Ethereum Everyday wallets that want rebates
FFlashbots Protect Private RPC Frontrunning ↩ 90% + gas Ethereum The conservative, battle-tested default
MMetaMask Smart Transactions Wallet feature Frontrunning + failed transactions (99.9% success rate) — free Ethereum, Linea, Base, Arbitrum, BNB Chain MetaMask users who want zero setup
11inch Fusion Intent DEX Sandwiching/frontrunning via off-chain intents price ✓ Ethereum + major L2s Swappers who want gasless, protected trades
CCoW Swap Batch-auction DEX Sandwiching/frontrunning via uniform-price batch auctions surplus ✓ Ethereum, Gnosis, Arbitrum, Base Spot swaps that want best price + protection
MMerkle (Blink) Private RPC Frontrunning ↩ wallets Ethereum, BSC, Polygon, Base, Arbitrum, Solana Wallets & RPC providers
SShutter Network Encrypted mempool Frontrunning 🔒 encrypted Ethereum (PBS-bound), Gnosis Chain Apps that need intent-hiding + censorship resistance
BbloXroute Protect Private RPC Frontrunning via relayer-level private submission — Ethereum + multichain Teams already on bloXroute infra
EEden Network Private RPC Frontrunning by bypassing the public mempool — Ethereum A simple direct-to-builder RPC swap

“Rebate” = whether the service pays back-run value to you. Adoption figures on each page are dated snapshots (provider docs & public reports, 2026), not live.

How to choose

Want protection on every dApp?

Set MEV Blocker or Flashbots Protect as your wallet RPC — done.

Use MetaMask?

Just enable Smart Transactions — zero setup, multichain.

Mostly swapping tokens?

1inch Fusion or CoW Swap protect you by design — and are gasless.

Want protection without centralization?

Shutter’s encrypted mempool hides your intent entirely until inclusion.

Popular head-to-head comparisons

Flashbots Protect vs MEV BlockerMEV Blocker vs MetaMask Smart TransactionsFlashbots Protect vs MetaMask Smart Transactions1inch Fusion vs CoW SwapMEV Blocker vs CoW SwapFlashbots Protect vs Merkle (Blink)

Guides

Avoid sandwich attacksBest protection RPCWhat is a private mempoolPublic vs privateWhat is MEVAdd RPC to MetaMaskEncrypted mempools

Frequently asked questions

What is the mempool?
The mempool (“memory pool”) is the public waiting room for transactions: after you broadcast a transaction it sits here, visible to everyone, until a validator includes it in a block. Because it’s public, bots can see your pending trade and try to profit from it.
What is MEV?
MEV (Maximal Extractable Value) is the profit bots and block builders can make by reordering, inserting or censoring transactions in a block. The most harmful kind for everyday users is the sandwich attack, where a bot trades just before and just after your swap to skim value from your price.
What is a sandwich attack?
A bot spots your pending swap in the public mempool, buys the same asset right before you (pushing the price up), lets your trade execute at the worse price, then sells right after — pocketing the difference. MEV-protection services stop this by keeping your transaction out of the public mempool.
Public vs private mempool — what’s the difference?
In the public mempool your transaction is visible to every bot before it’s mined. A private mempool (or private RPC) sends your transaction straight to block builders without broadcasting it publicly, so there’s nothing for sandwich bots to see. Some services go further and auction the harmless “back-run” value back to you.

See all FAQs →