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Best smart-contract audits in 2026

Audit firms evaluated across their post-audit exploit record, accountability and reconstructability, method depth, and price transparency.

Certora
#1 of 9 · published ranking
Certora
82ChainChoice Score
Why it leads
Best in the pool on method depth (10/10; next 9/10)
Cost
Not priced · No comparable price is published
9 compared Ranking-blind · 392 modules checked 2026-09-18Scored under methodology v2026.09.15 (2026-09-16)
9smart-contract audits · sorted by chainchoice score
ranked before any payout data is seen
#1 overallcomputed before any payout data is seenOverall
Certora
Certora
Formal verification with a self-reported denominator — and self-incriminating post-mortems
Leads the pool on Method depth for your stack
82ChainChoice Score · first of 9
Catalog strengths
Formal verification with a self-reported find denominator (Aave)A genuine free self-serve tierSigned post-mortems of its own misses (Silo, Balancer)
Why it leads
  • Best in the pool on method depth (10/10; next 9/10)
  • 3 points ahead of Zellic: +5.0 pts price transparency, +3.0 pts method depth
  • Provider states broad availability
Evidence
4/4
criteria scored · no receipt file
Margin
+3
over Zellic, ranked #02
Rank stability
Firm
#1 holds when every published criterion is moved ±1
Tradeoff
−5
Post-audit exploit record — behind this pool's best
Jurisdiction
Global
no restricted market on record
Score breakdowntick = pool best
Post audit record4/10
Accountability8/10
Method depth10/10
Price transparency7/10
Ranking-blind · a guided run tailors this to your size, custody & jurisdiction
#ProviderCost or feeScoreEvidenceKey strengths
2−3
Zellic
Price
—
no receipt file
The strongest non-EVM bench here (Rust/Solana, Move/Sui, Cosmos, Cairo, ZK)Published find rate: critical or high findings in 153 of 338 reviews
3−8
Sherlock
Price
—
no receipt file
Optional Shield coverage on Sherlock-audited code, up to $500,000A staffed-audit and contest hybrid, with contest length published by codebase size
Same score, not joint · ordered by weighted total (44.80 against 44.60)
4=
Trail of Bits
Trail of Bits
Price
—
no receipt file
Named engineers committed and disclosed pre-engagement — strongest identity guarantee hereCross-discipline teams (appsec, cryptography, blockchain)
5−1
Immunefi
Immunefi
your cost/yr
$1,200
no receipt file
Published 10% fee on bounty payouts — the only published fee in the categorySelf-reported payout ledger ($125M+ paid in bounties) and researcher pool
6−4
Cyfrin / CodeHawks
Price
—
no receipt file
The most granular published find-rate and per-category density dataInspectable methodology via open tooling (Aderyn, Solodit)
7−10
OpenZeppelin
OpenZeppelin
Price
—
no receipt file
Institutional EVM assurance from the team behind the standard contract libraryFour-stage process including fix review and ongoing support
8−7
Spearbit / Cantina
Spearbit / Cantina
Price
—
no receipt file
Access to a curated bench of elite independent researchersLarge public competition prize pools and an open researcher marketplace
Joint #8 · ordered by unrounded weighted total (36.23 against 36.21)
9=
CertiK
Price
—
no receipt file
Highest audit volume in the marketExtensive free public surface (Skynet scores, leaderboards)
Ranking-blind — order computed before any payout data is joined
Below the table

How this ranking works

Everything the table draws on continues here: how firm the #1 is, the per-criterion arithmetic behind each score, who pays ChainChoice, and the full guide to choosing.

Direct answer

What is the best smart-contract audits in 2026?

Certora ranks #1 overall for smart-contract audits on ChainChoice. Formal verification with a self-reported denominator — and self-incriminating post-mortems. It holds that rank under an affiliate-blind methodology scored across 4 published, weighted criteria — the code that ranks providers physically cannot read affiliate payouts (CI-enforced), so a payout can't move a rank. The verdict re-computes on every fee change, incident, or regulatory action; full reasoning and the audit receipt are below.

Best picks

Best smart-contract audits in 2026

The right audit firm depends on your stack, your deadline, and how much assurance you actually need — but the decisive input is the firm's record on code it has already reviewed. Brand, client logo walls and self-reported 'TVL secured' are not scored here, because a self-reported metric without a denominator is marketing. What is scored is what happened after the review, and whether the engagement can be reconstructed from a published report and a commit-pinned scope.
Best overall
Certora
Certora
Formal verification with a self-reported denominator — and self-incriminating post-mortems
Data checked Sep 2026
Certora verifies bytecode against written correctness specs, and it publishes post-mortems incriminating itself (Silo, Balancer) plus a denominator on its own blog: across its Aave engagement it reviewed 169 contracts and 51,289 lines of Solidity and prevented 28 significant bugs. It is also the only one with a genuine free tier (2,000 Prover minutes a month, write your own rules). The limit is structural and the buyer owns it: a proof only covers the properties you wrote. On Balancer, Certora’s verified properties “were not strong enough to detect the rounding error” later exploited; on Silo, its own report says “We made a mistake” and that the exploited vulnerability “was not identified during that review”.
Best for: Formal verification with a self-reported find denominator (Aave)
Why this score4 published criteria · leads 1 of 4
Published criterionWtScore, and the best hereGap/10Pts
Post-audit exploit record7.7−544.1
Accountability & reconstructability6.7−287.2
Method depth for your stack5.8·107.7
Price transparency3.8−173.6
Σ methodology points22.5/32

Each bar is the score on that criterion’s own 0–10 scale, never rescaled to the pool. The dark line is the best any product here reached on that axis. Wt is the most the criterion can add to the 86-point weighted total. Pts is weight × score × 32; the sum is the methodology score, and each weighted point behind the leader costs 2.6 on the displayed score. how these are weighted

Considered and not ranked
6 products we looked at and left out
A shortlist is only honest if it says who it turned away. Each of these was assessed against the same published criteria as the ranked table and excluded for a stated reason — not overlooked.
We assessed 10 products here and rank 4 — 40% of what we looked at. That share is of the products we assessed, not of the category: how many exist is not something we can count, so we do not claim a number for it.
Code4renaSlither· Ranked elsewhereSolodit· Ranked elsewhereOlympixSecureumGauntlet
Why it ranks first
Why Certora leads this category right now
Certora verifies bytecode against written correctness specs, and it publishes post-mortems incriminating itself (Silo, Balancer) plus a denominator on its own blog: across its Aave engagement it reviewed 169 contracts and 51,289 lines of Solidity and prevented 28 significant bugs. It is also the only one with a genuine free tier (2,000 Prover minutes a month, write your own rules). The limit is structural and the buyer owns it: a proof only covers the properties you wrote. On Balancer, Certora’s verified properties “were not strong enough to detect the rounding error” later exploited; on Silo, its own report says “We made a mistake” and that the exploited vulnerability “was not identified during that review”.
Best for
Formal verification with a self-reported find denominator (Aave)
Main tradeoff
A proof only covers the properties SOMEONE WROTE — spec adequacy is your risk
Verify before signup
Get the COVERED-CONTRACT LIST and the verified properties in writing — on Balancer the verified properties did not reach the rounding error that was exploited.
Recommendation summary
What should decide this category
Which language and execution environment is your codebase in, and does the firm have a bench for it?
Do you need a published report, or is a private review acceptable to your stakeholders?
How much of your deadline can absorb a formal-verification engagement rather than a review?
Quick picks
Strong options in this category
Start with the lead choice first, then use the shortlist only if you still need a challenger or stronger fit for a specific setup.
Best overall
Certora
Certora
Formal verification with a self-reported denominator — and self-incriminating post-mortems
Certora verifies bytecode against written correctness specs, and it publishes post-mortems incriminating itself (Silo, Balancer) plus a denominator on its own blog: across its Aave engagement it reviewed 169 contracts and 51,289 lines of Solidity and prevented 28 significant bugs. It is also the only one with a genuine free tier (2,000 Prover minutes a month, write your own rules). The limit is structural and the buyer owns it: a proof only covers the properties you wrote. On Balancer, Certora’s verified properties “were not strong enough to detect the rounding error” later exploited; on Silo, its own report says “We made a mistake” and that the exploited vulnerability “was not identified during that review”.
Best for: Formal verification with a self-reported find denominator (Aave)
Post-audit exploit record · 32%
4/10
Accountability & reconstructability · 28%
8/10
Method depth for your stack · 24%
10/10
Price transparency · 16%
7/10
Quick pick
Zellic
Strongest non-EVM bench, published find rate — and it is winding down Code4rena
Zellic is the pick when your codebase is Rust/Solana, Move/Sui, Cosmos, Cairo or ZK circuits: the bench depth there is genuinely differentiated versus EVM-first firms, and it publishes a denominator — “In 153 out of 338 reviews, we identified critical or high impact findings” — with hundreds of public reports on GitHub. The risk is counterparty continuity rather than audit quality: Zellic acquired Code4rena, and Code4rena’s homepage now reads “Code4rena is winding down.”
Best for: The strongest non-EVM bench here (Rust/Solana, Move/Sui, Cosmos, Cairo, ZK)
Post-audit exploit record · 32%
9/10
Accountability & reconstructability · 28%
7/10
Method depth for your stack · 24%
8/10
Price transparency · 16%
2/10
Quick pick
Sherlock
Staffed audits and contests with optional Shield coverage — capped at $500,000
Sherlock runs audits that combine “the coordination of a staffed audit with the parallel discovery of a contest”, and sells Sherlock Shield as coverage on code it has audited. Shield “is not included by default with every audit and is not free”, its maximum coverage is **up to $500,000** — not the $2M figure circulating in secondary write-ups — and “Sherlock does not guarantee payment or the availability of funds.” Against nine-figure TVL that is immaterial: treat Shield as a signalling device and a small deductible offset, not as risk transfer. This record previously cited a paid claim after Sherlock's Euler review; no primary Sherlock record of that claim could be found on 14 September 2026.
Best for: Optional Shield coverage on Sherlock-audited code, up to $500,000
Post-audit exploit record · 32%
5/10
Accountability & reconstructability · 28%
8/10
Method depth for your stack · 24%
5/10
Price transparency · 16%
4/10
Quick pick
Same score, not joint · ordered by weighted total (44.80 against 44.60)
Trail of Bits
Trail of Bits
Named engineers, engineer-week scoping — and a documented triage failure
Trail of Bits is the accountability benchmark: specific named engineers are assigned and disclosed before work begins, scoping is in engineer-weeks, and it publishes its own tooling (Slither, Echidna, Medusa). Its measurable record is worse than the usual framing, and the firm says so itself. On Balancer it did not merely miss the bug — its October 2021 review RAISED the issue as TOB-BALANCER-004 but marked it 'undetermined severity' because it could not determine exploitability. That is a triage failure, not a detection failure, and the same arithmetic-rounding class reached production twice on reviewed code in 2025.
Best for: Named engineers committed and disclosed pre-engagement — strongest identity guarantee here
Post-audit exploit record · 32%
3/10
Accountability & reconstructability · 28%
10/10
Method depth for your stack · 24%
9/10
Price transparency · 16%
3/10
Frequently asked
Questions people ask before choosing smart-contract audits
Does a passed audit mean the code is safe?
No. An audit is a time-boxed review of a specific commit, not a guarantee, and every major firm in this pool has had reviewed code exploited afterwards. What separates them is whether they disclose it — a firm that publishes its own misses is easier to trust than one that publishes none.
Why is price the lightest criterion?
Because almost every firm here is quote-only, so there is no comparable price to rank. What is scorable is disclosure: whether a buyer can form any cost expectation before entering a sales process.
What matters most when picking an audit firm?
The post-audit exploit record and whether the engagement is reconstructable — together 60% of the weight. Method depth for your specific stack follows, and price transparency is scored on disclosure rather than level.
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How this ranking is built
Reviewed on the post-audit exploit record, accountability and reconstructability, method depth for your stack, and price transparency. Brand and “TVL secured” are never scored.
Data checked Sep 2026 · Independent rankings · We show our work
Not financial advice · For informational purposes only · Always do your own research
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