Provider at a glance
- Category
- MEV Protection
- Entity
- Not verified
- Official website
- mevblocker.io
Independent rankingchecked How it works
Details
Scored 79 out of 100 under methodology 2026.10.18, from the evidence read in October 2026.
MEV Blocker
Ethereum RPC with a backrun auction
MEV Protection
#1 Overall
Ranked #1 of 8 MEV protection in the published ranking
79
ChainChoice Score
The ChainChoice Score, shown against 100: published scores run from 41 to 99.- High evidence confidence
- $0.00 your cost/yr
Is MEV Blocker right for you?
Right for you if these matter most
- Rebate published AND reaching the end user's address9/10, the category best
- Inclusion breadth and what happens when your transaction is dropped7/10, the category best
- Independence and quality of the protection evidence5/10; the category best is 6
Look elsewhere if these come first
- Order-flow privacy in practice5/10 here; Titan Builder scores 9
Not yet tested for your country. Markets it lists: Global.
to test where you can use it.
The rank above is the published one, the same for every reader. Find my best MEV protection service shows where it lands for you.
What will MEV Blocker cost you?
$0.00 your cost/yr
The fee alone, plus network gas.
- Your monthly volume
- $1k
- Taker fee
- 0%
How safe is MEV Blocker?
- Evidence: verified4 of 4 criteria rest on quoted, sourced receipts. Read October 2026.
- LicenceMiCA (EU): no register record on file here.
Alternatives to MEV Blocker
Compare all 4- 2Flashbots Protect2 points below · stronger on order flow privacy (6 against 5)77$0.00
- 3CoW Swap8 points below · stronger on order flow privacy (6 against 5)71$2.40
- 4Titan Builder12 points below · stronger on order flow privacy (9 against 5)67
For your setup
Find out if MEV Blocker fits you
The rank above is the published one — the same for every visitor. Answer the category's questions and this section shows where MEV Blocker lands for you, which criteria your answers weight up, and which stated needs the record does or does not meet. The published rank stays beside it.
- A few questions
- No account required
- Ranking-blind: no commercial input
- Personalised in under 60 seconds
Find my best MEV protection serviceNothing is inferred from clicks, popularity or commercial value.
Why it leads
Why MEV Blocker ranks #1
Each strength is read from evidence on a 0–10 ladder and weighted as the published methodology states. The 32 objective points these produce (21.1 here) sit inside the score; availability, friction, trust record and measured data add the rest. Best in this ranking on 2 of 4.
4 published criteria · Σ weight 100
CriterionWeightStrength · 0–10ScoreContrib.MedianBestRankEvidence
305+4.805.09#4/8Loading evidence…
309+8.643.09#1/8Loading evidence…
207+4.485.07#1/8Loading evidence…
205+3.203.56#2/8Loading evidence…
Hairline = best in this ranking · tick = its median · a missing bar is "not scored", never zero
Margin+2over Flashbots Protect, #2
RobustnessOne point from changingacross a one-point change to each of its 4 criterion scores, the re-run scores 79–80 and ranks #1–#2
Evidence4 of 4 scored4 quoted, 4 with a source link
What would move the rank
Each line is the ranking run again with one of MEV Blocker’s criterion scores changed and every other value held: the smallest whole-point change on that criterion that moves its rank, and where the re-run puts it. Up to 4 climbs and 3 falls are listed, smallest change first. Nothing here is a forecast.
Order-flow privacy in practice 5 → 4 on its ladder · Flashbots Protect passes it−179#1 → #2
Rebate published AND reaching the end user's address 9 → 8 on its ladder · Flashbots Protect passes it−179#1 → #2
Inclusion breadth and what happens when your transaction is dropped 7 → 5 on its ladder · Flashbots Protect passes it−278#1 → #2
Strengths
3 from the score dataWhere it leads
Best for readers who weight
- Rebate published AND reaching the end user's address — 9/10, the category best
- Inclusion breadth and what happens when your transaction is dropped — 7/10, the category best
- Independence and quality of the protection evidence — 5/10, category best 6/10
Tradeoffs
1 from the score dataWhere it trails
Not for readers who put first
- Order-flow privacy in practice — 5/10 against a category best of 9/10
Record watch-outs
- It 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".
- (1) It is the sole highest, not joint — Table 5 reads MEV Blocker 85%, Flashbots 84%, Blink 84%, Merkle 70%. (2) More importantly, the paper's own body contradicts Table 5: section 4.1 states "Out of the 273 transactions submitted, MEV Blocker, Blink and Flashbots successfully executed their transactions with a rate of exceeding 90%, while Merkel's success rate was lower at 74[%]". The paper reports two irreconcilable success-rate sets.
- The announcement is dated 23 January 2026 on SMG's own memo.
Competitive position
Where MEV Blocker leads and where it trails
Rank on every objective dimension among the rows scored on it. A criterion in the top third of its pool is listed as a lead, the bottom third as a trail; the middle is neither. Popularity, size and commercial terms are not dimensions.
Availability#1 / 814.0 of 20 · constant here
Published criteria#1 / 815.8 of 30 · pool best
Friction#1 / 82.7 of 10 · constant here
Trust record#1 / 83.2 of 8 · constant here
Measured data#1 / 88.3 of 18 · constant here
Where MEV Blocker leads
- Rebate published AND reaching the end user's address#1 / 8
- Inclusion breadth and what happens when your transaction is dropped#1 / 8
- Independence and quality of the protection evidence#2 / 8
Where it trailsNo criterion in the bottom third of its pool.
Closest alternatives
The 3 nearest rows by score
Nearest by published score in either direction. Each card states the criteria on which the two rows differ and the cost difference under the same scenario inputs; the compare arithmetic below shows why the higher one ranks higher.
Flashbots Protect#2 of 8 · score 77 · 2.0 points behind
MEV Blocker leads on
- Rebate published AND reaching the end user's address9 vs 7
- Inclusion breadth and what happens when your transaction is dropped7 vs 6
Flashbots Protect leads on
- Order-flow privacy in practice6 vs 5
- Independence and quality of the protection evidence6 vs 5
Largest single reason MEV Blocker is ahead: published criteria (+1.8 display points).Scenario cost: not compared, since Flashbots Protect's figure is the fee alone, plus network gas.
CoW Swap#3 of 8 · score 71 · 8.0 points behind
MEV Blocker leads on
- Rebate published AND reaching the end user's address9 vs 5
- Inclusion breadth and what happens when your transaction is dropped7 vs 6
- Independence and quality of the protection evidence5 vs 4
CoW Swap leads on
- Order-flow privacy in practice6 vs 5
Largest single reason MEV Blocker is ahead: published criteria (+8.1 display points).Scenario cost: not compared, since MEV Blocker's figure is the fee alone, plus network gas.
Titan Builder#4 of 8 · score 67 · 12.0 points behind
MEV Blocker leads on
- Rebate published AND reaching the end user's address9 vs 2
- Inclusion breadth and what happens when your transaction is dropped7 vs 4
- Independence and quality of the protection evidence5 vs 3
Titan Builder leads on
- Order-flow privacy in practice9 vs 5
Largest single reason MEV Blocker is ahead: published criteria (+11.7 display points).Scenario cost: not compared, since MEV Blocker's figure is the fee alone, plus network gas.
Against #2
79 vs 77 · gap 2.0Why MEV Blocker ranks above Flashbots Protect
DimensionThisFlashbots ProtectGap share
Availability · 23% weight · constant here14.014.0same
Published criteria · 35% weight15.815.1+1.8, better
Friction · 12% weight · constant here2.72.7same
Trust record · 9% weight · constant here3.23.2same
Measured data · 21% weight · constant here8.38.3same
Published criterionThisFlashbots ProtectPoints
Order-flow privacy in practice · w3056−0.96, worse
Rebate published AND reaching the end user's address · w3097+1.92, better
Inclusion breadth and what happens when your transaction is dropped · w2076+0.64, better
Independence and quality of the protection evidence · w2056−0.64, worse
Net7977+2.0
Your scenario
What MEV Blocker costs on your scenario
Taker fee on your volume for a year. Excludes network gas and any withdrawal fee. Change an input and every figure recomputes from the published rate; the published rank does not move.
your cost/yr · default scenario — set your own
$1k a month × 12 months × 0% taker fee = $0.00 / year
Your monthly volume · your input$1k
Taker fee · published rate0%
Rate read from the provider’s published pricing ↗ on 22 October 2026.
your cost/yrCost is stated as your cost/yr in USD; it is never a yield, never annualised, and it does not enter the score.
$0.00
The fee alone, plus network gas: not a total, and never compared as one.Under the default inputs · USDCategory median and cheapestNot statedOnly 1 of 8 rows publish a comparable price; a median and a cheapest row need at least 3.
2 of 8 rows in this ranking have no verified rate for this scenario and are absent from the median, not counted as free.
5 of 8 quote a zero fee that leaves costs out, so they are absent from the median and the cheapest row, not counted as free.
Evidence
Evidence read 22 October 2026
One row per published criterion: the page each strength was read from, its source type by domain, the reading date and whether the file and the published table agree. Open a row for the quote and the receipt.
4 of 4 cells scored
Score evidenceVerified4 of 4 criteria reconstruct from receipts
4 of 4 criteria reconstruct from a quoted, sourced receipt equal to the published strength.Public receiptsReading…4 quoted with a source URL
The receipt file has not been read yet.Evidence confidenceHighcoverage and corroboration, never freshness
4/4 criteria scored, with 4 dated sources quoted.RobustnessOne point from changingrank #1 to #2 across one-point re-runs
Whether the position holds when one criterion score is changed by one point and the ranking is run again. It is always a re-run of the ranking, never an estimate.The newest evidence read on the platform is 3 November 2026; this category's reading is older. The scores stand as read on 22 October 2026.
Reading the evidence ledger…
CriterionSourceTypeReadFreshnessStatusReceipt
Order-flow privacy in practicestrength 5 · weight 30Report an error—22 October 2026*
Unknown
No reading date is recorded for this cell or its category.No receipt
A strength is published but no quote or source page is on file for it.Rebate published AND reaching the end user's addressstrength 9 · weight 30Report an error—22 October 2026*
Unknown
No reading date is recorded for this cell or its category.No receipt
A strength is published but no quote or source page is on file for it.Inclusion breadth and what happens when your transaction is droppedstrength 7 · weight 20Report an error—22 October 2026*
Unknown
No reading date is recorded for this cell or its category.No receipt
A strength is published but no quote or source page is on file for it.Independence and quality of the protection evidencestrength 5 · weight 20Report an error—22 October 2026*
Unknown
No reading date is recorded for this cell or its category.No receipt
A strength is published but no quote or source page is on file for it.How you can lose money here, and what the ranking scores
- Liveness failure (MEV Blocker 7/10): the operator stops, censors you or loses data.Scored by Inclusion breadth and what happens when your transaction is dropped · 20%
- Execution failure (MEV Blocker 5/10): you get a worse price, later, or nothing.Scored by Order-flow privacy in practice · 30%
- Information failure (MEV Blocker 5/10): the number is wrong or bought, or your data leaks.Scored by Independence and quality of the protection evidence · 20%
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%).
Facts
facts, not scoresWhat the record publishes
- Pricing
- 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). 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).MEV Blocker — official pricing page ↗ · 22 October 2026
- Prices published in
- USDMEV Blocker — official pricing page ↗ · 22 October 2026
- Licences held
- Not published
- Compliance level
- partial
- Regulatory note
- Not published
- Supported chains
- Multi-chain
- Markets served
- global
- Primary markets
- Not published
- Restricted markets
- Not published
- Operating limits
- Not published
- Availability note
- MEV Blocker's site (mevblocker.io) links its Terms of Use to Consensys's terms (consensys.io/terms-of-use, served at metamask.io/terms-of-use, "LAST UPDATED: JUNE 2026", read 22 October 2026). They require users to be "not located in any country subject to a comprehensive sanctions program implemented by the United States." The terms name no countries. The public endpoints are permissionless and Ethereum-only (docs.mevblocker.io: "All features are supported on Ethereum.").
No confirmed legal entity is on file for this record. Nothing is inferred from the brand name.
If something goes wrong with MEV Blocker: where to complain, and where to report a scam
Loading the routes for your country.
How this page is reviewed
Reviewed means this product in this category 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.
Accountable for this review: Mathias Siemonsmeier, Founder.
How we review · Review calendar · Corrections log · How we make money
History
What the record carries
Changes to published ranks are recorded in a ledger; every step and its cause is listed on the rank-history page. The entries below begin with the current verified snapshot, then the methodology versions whose changes applied to this category, newest first.
9 methodology entries
- 22 October 2026Current verified snapshot · methodology 2026.10.18Score 79, #1 of 8. 4 of 4 criteria scored. History starts here; earlier values are not interpolated.
- 10 October 2026
2026.10.8When nothing serves your country, the list shown for reference is the published ranking · platform-wide- fixed The reference list shown when nothing serves your country is the published order with the published scores, and a build check now fails any such list out of that order or with a score the ranking does not publish.
- fixed The explorer prints an overall rank only for a row the published ranking holds; a country entrant such as Coinbase Commerce for US merchants shows no overall rank.
- changed Published orders do not move. Country results change only where nothing serves the country: in India bill pay keeps Bitcoin Well first and now shows Strike second, as published; 35 such runs across all categories and countries now match the published list exactly.
- 10 October 2026
2026.10.6A criterion you require re-scores the rows that meet it · platform-wide- changed The explorer sends each criterion you require, at any band, as fit_required with your other answers; region, licence, chain and fact filters stay filters. On /best, a required criterion joins For you as a marked preference does, which needs your country; Overall stays the published ranking, filtered.
- added Every published criterion has a golden case as the explorer sends it (require:<criterion>), so the order a requirement gives is replayed and gated as the published order is, and a change to it needs an entry here.
- 16 September 2026
2026.09.15Dimension scores carry tenths, and eleven more categories are re-read from primary sources · platform-wide- changed Dimension scores resolve to tenths of a point (O-04b), and weightedTotal is rounded to six decimal places before the order is read. 518 published scores move across 107 categories that were not re-read; none of them moves by more than 4 points, and most move by 1.
- fixed 66 published scores change in the eleven re-read categories, against a verbatim source each. The largest moves are Reflexer RAI (−16), Beefy and Unrekt (−11), Aztec (−10) and Golem (+9) — all of them rows whose sources had moved since their last read.
- changed Published order moves in 38 of 119 categories and three #1s change: smart_contract_audits (Zellic → Certora) and travel_rule_compliance (Sumsub Travel Rule → CodeVASP) on the finer resolution, kyc_compliance (Veriff → Sumsub) on the re-read.
- added availabilitySource (O-04g): for a reader who states a country, a row whose availability in that country rests on a region tag its record gives no source for sorts below every sourced row. It is inert in every order published here, which states no country.
Methodology 2026.10.18, the same published run every visitor sees · receipt mev_protection:mev_blocker:2026.10.18:3ea6872f9a95
Are you MEV Blocker? Reply to this verdict, or send evidence, ask for a correction or claim the listing. Every message gets a public ticket number; none of it changes a rank unless a public page or a signed statement supports it.