MEV Protection evaluated across order-flow privacy in practice, rebate published and reaching the end user's address, inclusion breadth and what happens when your transaction is dropped, and independence and quality of the protection evidence.
Ranked here: MEV protection services that route your transactions so that they are protected from MEV. Not ranked here: wallets and DEX aggregators where MEV protection is one feature (CoW Swap and UniswapX, built around it, are ranked on both pages), infrastructure other products build on, and closed services.
#1 of 8 · published ranking
MEV Blocker
79ChainChoice Score
4199
Why it leads
MEV Blocker scores higher than everything else in this ranking on its rebate paid to user and its inclusion and censorship.
Show the arithmetic
Best in this ranking on rebate paid to user and inclusion and censorship
Cost
From $0.00 your cost/yr · Your monthly volume: $1k
ReviewedNext review by Published Methodology v2026.11.1
How this page is reviewed
Reviewed means every product ranked on this page was read against its sources on or after that date; every ranked category is re-read at least every 45 days. Models research, extract and parse. A deterministic engine ranks. Every quote passes an adversarial refute pass.
No provider can pay for a position in this table. The code that computes this order cannot read which links carry a referral code, and every build proves it. Every score below rebuilds from the published criteria.Ranking v2026.11.1 · 4 criteria · 8 products · same inputs, same order
How we review · 8 ranked of 16 assessed · 4 criteria · 0 sponsor weight
How we review
8ranked
16assessed
4criteria
0sponsor weight
Recommendation first, comparison only if needed.
Reviewed and rechecked on the current cycle.
Commercial relationships disclosed before clickout.
Personal comparison
What MEV protection cost you
Your inputs update the cost column. The independent ranking stays fixed.
Taker fee on your volume for a year. Excludes network gas and any withdrawal fee.
RankProviderBest fitScoreYour cost
1
MEV BlockerEthereum RPC endpoint running a backrun...Top ranked
Rebate published AND reaching the end user's address — 9/10Trade-off: It is no longer a CoW DAO product. Special Mechanisms Group, a Consensys subsidiary,...
79score
your cost/yr
Check availability for your country
MEV Blocker · mevblocker.io. Provider links appear once we know which country you are browsing from: ChainChoice links to providers only where it serves in full.
Commission: This provider pays ChainChoice nothing for this link. Disclosure
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
2
Flashbots ProtectOriginal private RPC, now routed throug...
Rebate published AND reaching the end user's address — 7/10Trade-off: The headline "100% of gas fee refunds" is conditional on BuilderNet winning the block...
77score
your cost/yr
Check availability for your country
Flashbots Protect · docs.flashbots.net. Provider links appear once we know which country you are browsing from: ChainChoice links to providers only where it serves in full.
Commission: This provider pays ChainChoice nothing for this link. Disclosure
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
3
CoW SwapIntent-based DEX settling trades in bat...
Order-flow privacy in practice — 6/10Trade-off: CoW Swap keeps 50% of any price improvement it wins for you, capped at 0.98% of volum...
71score
Lowest at your inputs
Check availability for your country
CoW Swap · swap.cow.fi. Provider links appear once we know which country you are browsing from: ChainChoice links to providers only where it serves in full.
Commission: This provider pays ChainChoice nothing for this link. Disclosure
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
4
TITitan BuilderEthereum block builder with a direct bu...
Order-flow privacy in practice — 9/10Trade-off: This is not an MEV protection product and should not be compared as one. It is a bloc...
67score
-Not published
Check availability for your country
Titan Builder · titanbuilder.xyz. Provider links appear once we know which country you are browsing from: ChainChoice links to providers only where it serves in full.
Commission: This provider pays ChainChoice nothing for this link. Disclosure
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
5
UniswapXIntent-based routing where fillers comp...
Inclusion breadth and what happens when your transaction is dropped — 5/10Trade-off: It is marketed under 'MEV protection' but your signed order is broadcast publicly and...
60score
your cost/yr
Check availability for your country
UniswapX · blog.uniswap.org. Provider links appear once we know which country you are browsing from: ChainChoice links to providers only where it serves in full.
Commission: This provider pays ChainChoice nothing for this link. Disclosure
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
Same score, not joint · ordered by weighted total (36.80 against 36.60)
6
Blink (formerly Merkle.io)B2B MEV-protection RPC sold to wallets...
Order-flow privacy in practice — 5/10Trade-off: Merkle.io and Blink are the same company, not two options — docs.merkle.io now 307-re...
60score
your cost/yr
Check availability for your country
Blink (formerly Merkle.io) · blinklabs.xyz. Provider links appear once we know which country you are browsing from: ChainChoice links to providers only where it serves in full.
Commission: This provider pays ChainChoice nothing for this link. Disclosure
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
2 more assessed and ranked below — none of them hidden for commercial reasons.
Ranked on 4 published criteria weighted 30/30/20/20, which set goal alignment — 30 of the 86 points. The rest: regional access 20 (constant here), evidence depth 18 (constant here), ease of use 10 (constant here), institutional trust 8 (constant here). Profile match is shown in breakdowns but carries no weight.
How you can lose money here, and what the ranking scores
Liveness failure: the operator stops, censors you or loses data.
Scored by Inclusion breadth and what happens when your transaction is dropped · 20% (MEV Blocker 7/10, Flashbots Protect 6/10, CoW Swap 6/10)
Execution failure: you get a worse price, later, or nothing.
Scored by Order-flow privacy in practice · 30% (MEV Blocker 5/10, Flashbots Protect 6/10, CoW Swap 6/10)
Information failure: the number is wrong or bought, or your data leaks.
Scored by Independence and quality of the protection evidence · 20% (MEV Blocker 5/10, Flashbots Protect 6/10, CoW Swap 4/10)
Not assessed by this ranking: Control failure, Regulatory failure, Exit failure. A high place says nothing about these; the Methodology tab says what each means.
Also scored, as cost, quality or a summary of several families: Rebate published AND reaching the end user's address (30%).
Audit
Infrastructure
Methodology
2026.11.1
published 10 November 2026
Providers tracked
860+
across 121 categories
Last verified
22 October 2026
newest dated pricing or sentiment read
Named on the roster
2 people
managing directors · 6 automated processes
Decision guide
What matters most before choosing in this category
The best MEV protection depends on whether you need the transaction genuinely withheld until inclusion, and on where any rebate actually lands. Those two carry 60% of the weight between them, because they are the mechanism and the payout — an endpoint that leaks calldata to builders before inclusion has not protected anything, and a published rebate rate that settles anywhere other than your own address is not a rebate to you. Inclusion breadth and the independence of the protection evidence follow.
Do you need the transaction genuinely withheld until inclusion, or is a faster public route acceptable?
Which chain are you swapping on — most protection services are EVM-only, while Jupiter is the default on Solana?
Would you accept slower inclusion in exchange for a genuinely private route?
Current engine lead
The #1 overall and the scoring weights
MEV BlockerData checked Oct 2026
Ethereum RPC endpoint running a backrun-only order flow auction
Ethereum RPC endpoint running a backrun-only order flow auction. Strongest on rebate published AND reaching the end user's address (9/10): MEV Blocker pays 90% of the backrun profit a transaction creates to the sender's own address (tx.origin) in the same block. Its homepage shows over 5.5K ETH rebated to users, with the totals linked to a public Dune dashboard. Weakest on order-flow privacy in practice (5/10): The default endpoint shares each unsigned transaction with all permissionlessly connected searchers, mixed with fake transactions. Only the /fullprivacy endpoint keeps a transaction from searchers, and that endpoint pays no rebate. Published price: Free to users: the MEV Blocker docs introduction (docs.mevblocker.io, read 22 October 2026) says MEV Blocker is "free for users to integrate" (worked reading: no user fee, typed as a fee of 0 percent).
Best forRebate published AND reaching the end user's address — 9/10
Main tradeoffIt is no longer a CoW DAO product. Special Mechanisms Group, a Consensys subsidiary, acquired MEV Blocker RPC (announced January 2026) and now operates it — so the same corporate parent controls both MEV Blocker (90% to the user) and MetaMask Smart Transactions (no user rebate documented). Separately, the 90% rebate and maximum privacy are mutually exclusive: /fullprivacy pays "No rebate".
Verify before signupFree to users: the MEV Blocker docs introduction (docs.mevblocker.io, read 22 October 2026) says MEV Blocker is "free for users to integrate" (worked reading: no user fee, typed as a fee of 0 percent). How it works (docs.mevblocker.io/concepts/how-it-works): "MEV Blocker shares transactions with searchers via backrun bundles, returning 90% to the user." Revenue comes from builders: "Builders must pay MEV Blocker fees to access MEV Blocker transaction flow", billed (Fees mechanics page) as "Charge each builder 80% of the realized MEV Blocker value for the blocks they produced." The docs give two different figures for the share that goes back to wallets and other flow originators: "MEV Blocker shares 50% of builder fees with wallet flow originators" (How it works) and "redistributing 90% of builder fees that are attributable to the order flow originator" (Order flow auction).
Weighted criteria
Order-flow privacy in practice30%
Rebate published AND reaching the end user's address30%
Inclusion breadth and what happens when your transaction is dropped20%
Independence and quality of the protection evidence20%
Methodology
How this category is reviewed
Reviewed on order-flow privacy in practice, rebate published and reaching the end user's address, inclusion breadth and what happens when your transaction is dropped, and independence and quality of the protection evidence.
The order on this page is the published ranking for this category. Every criterion, weight and source behind it is on the methodology page.
Frequently asked
Questions people ask before choosing MEV protection
What is the safest MEV protection service?
Protection comes from whether the endpoint actually withholds your transaction. An endpoint that leaks calldata or hints to builders before inclusion has not protected anything, whatever block rate it advertises.
Do rebates actually reach me?
That is exactly what is scored, at 30% of the weight. A published rebate percentage that settles anywhere other than the trader's own address is not a rebate to the trader, so the criterion asks for evidence of arrival rather than an advertised rate.
What happens if my transaction is dropped?
It depends on the builder set behind the endpoint, which is why inclusion breadth and documented drop behaviour are scored together. A private relay that can protect you can also censor you, so the centralisation of that set is treated as a fact about your exposure.
Why are vendor-published protection rates not scored?
Because almost none of them can be independently reconstructed. A protection rate computed and published by the party selling the protection is shown here for context, and what is scored instead is whether the claim rests on data anyone outside the vendor could verify.
Reviewed22 October 2026Method4 criteriaCategorymev_protection
Not financial advice · For informational purposes only · Always do your own research
