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Smart Contract Audit

ConsenSys Diligence

Ethereum's most credible smart contract audit firm — backed by ConsenSys

New York, USA (distributed globally)Est. 201750–100 security researchers
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Quick Facts

Best For
Ethereum and EVM projects needing audits with institutional credibility and deep Ethereum protocol knowledge
Typical Engagement
2–8 weeks depending on codebase complexity; pricing from ~$30,000+

Overview

ConsenSys Diligence is one of the most credible smart contract audit firms in the ecosystem, backed by ConsenSys — Ethereum's most influential development organisation and creator of MetaMask and Infura. The firm's deep Ethereum protocol knowledge gives it a technical edge for complex Solidity audits, DeFi protocol reviews, and EVM-based security assessments. DiligenceSuit — its in-house automated toolset — supplements manual review to catch vulnerability classes that traditional audits miss. A ConsenSys Diligence audit carries significant credibility signal with institutional investors and protocol users.

Focus Areas

Solidity Smart Contract AuditsDeFi Protocol SecurityEVM Security ResearchAutomated Vulnerability DetectionToken Contract AuditsEthereum Protocol Security

Who They Work With

DeFi ProtocolsEthereum ProjectsToken IssuersWeb3 Infrastructure CompaniesEnterprise Blockchain Teams

Notable Audits

Uniswap V2Gnosis SafeVarious major DeFi protocols

How to Engage

Request via consensys.io/diligence; waitlist may apply for complex projects

Frequently Asked Questions about ConsenSys Diligence

How long does a ConsenSys Diligence audit typically take?
ConsenSys Diligence audits typically take 2 to 8 weeks depending on codebase complexity. Simple token contracts at the shorter end; complex DeFi protocols with multiple interacting contracts, upgradeable proxy patterns, and economic edge cases at the longer end. Teams should engage Diligence well before a planned launch — 6-8 weeks minimum lead time is recommended to account for scheduling and potential remediation cycles.
How much does a ConsenSys Diligence audit cost?
Pricing starts from approximately $30,000+ and scales significantly with codebase size and complexity. Large DeFi protocol audits with multiple interacting contracts can reach six figures. ConsenSys Diligence provides pricing estimates following an initial scoping call — the estimate is based on lines of code, complexity, and the specific security concerns relevant to the protocol's architecture.
Which chains and languages does ConsenSys Diligence cover?
ConsenSys Diligence specialises primarily in Ethereum and EVM-compatible chain audits, covering Solidity smart contracts. Its ConsenSys backing and deep Ethereum protocol knowledge give it a natural edge for EVM-based security assessments. For non-EVM chains (Solana, Cosmos, etc.), specialist auditors with chain-specific expertise are generally more appropriate.
Is there a waitlist for ConsenSys Diligence?
A waitlist may apply for complex or large-scale projects, particularly during periods of high demand. Teams should engage Diligence as early as possible in their development cycle — ideally 8-12 weeks before a planned audit start. The firm's website requests allow teams to submit project details for initial assessment before formal scheduling.
What notable projects has ConsenSys Diligence audited?
ConsenSys Diligence's most notable audits include Uniswap V2 and Gnosis Safe — two of the most widely-used smart contract systems in the Ethereum ecosystem. These audits represent the firm's capability and credibility for high-stakes protocol security at the foundational DeFi infrastructure level.
What tools does ConsenSys Diligence use in its audit process?
ConsenSys Diligence supplements manual code review with DiligenceSuite — its in-house automated toolset for vulnerability detection. This combines static analysis, fuzzing, and formal verification approaches to identify vulnerability classes that pure manual review might miss. The integration of automated tooling with senior researcher review is a standard approach for comprehensive smart contract security assessments.

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