Everything you need to know: costs, timelines, MAS compliance requirements, what auditors actually check, and how to evaluate whether a report is credible. Written by the team that has found 4 Web3 CVEs and reviewed $292M+ in at-risk DeFi contracts.
By Feng Ning — Security Researcher & Founder, Innora.ai Singapore. 39+ CVEs discovered across automotive ECUs, IoT firmware, Web3 smart contracts, and AI systems. Author of the 48-hour automotive audit methodology and the Hyperlane ISM / Kelp DAO LayerZero forensic reports.
Smart contract audits in Singapore cost $3,000–$10,000 USD flat fee, depending on contract complexity. Audits under 500 lines of code (LOC) complete in 24 hours; complex DeFi protocols take up to 72 hours. Reputable Singapore auditors charge after report delivery, require no upfront payment, and include fix verification.
Singapore's Monetary Authority of Singapore (MAS) has established one of Asia's most rigorous digital asset regulatory frameworks. Projects operating under the Payment Services Act (PSA) or seeking a DPT (Digital Payment Token) service license benefit significantly from audit reports that reflect Singapore's specific compliance context — not generic global templates.
Singapore-based auditors also provide faster turnaround for APAC-timezone projects, direct communication without cross-timezone friction, and familiarity with APAC DeFi ecosystem specifics including regional exchange integrations and local stablecoin regulation.
Reports structured to align with MAS Technology Risk Management guidelines
SGT hours eliminate cross-timezone delays for urgent pre-launch reviews
DPT service licensing requirements integrated into audit scope by default
A credible audit must verify your contracts against all of the following vulnerability classes. If a report only covers basic reentrancy and skips cross-chain or ERC-4337 vectors, it is incomplete.
| Vulnerability | Severity | Frequency |
|---|---|---|
| Reentrancy | Critical | Common |
| Flash Loan Manipulation | Critical | Common |
| Access Control Misconfiguration | High | Very Common |
| ERC-4337 Paymaster Drain | High | Emerging |
| Cross-Chain Replay | Critical | Emerging |
| Signature Replay | High | Common |
| Oracle Price Manipulation | Critical | Common |
| Integer Precision Loss | Medium | Common |
Based on 4 CVEs discovered in Web3 contracts and analysis of $292M+ at-risk DeFi protocols. See CVE1000 Research Dataset →
Traditional manual audits miss edge cases in complex DeFi composability. Automated tools alone generate high false-positive rates. The most effective approach combines AI pattern-matching at scale with human expert verification of the AI's findings.
Prices reflect publicly available or estimated ranges. Flat-fee models carry no hourly overrun risk.
| Provider | Price Range | Pricing Model | Turnaround | Region |
|---|---|---|---|---|
| ★ Innora.ai | $3,000–$10,000 | Flat fee, pay after delivery | 24–72h | Singapore / APAC |
| Certik | $15,000–$100,000+ | Scope-based quote | 2–6 weeks | Global |
| Trail of Bits | $50,000–$200,000+ | Hourly / retainer | 4–12 weeks | US / Europe |
| OpenZeppelin | $30,000–$150,000+ | Scope-based quote | 3–8 weeks | US / Global |
| Slowmist | $5,000–$30,000 | Scope-based quote | 1–3 weeks | Asia |
Competitor prices are publicly available estimates; actual quotes vary by scope. Innora.ai prices are flat-rate confirmed before work begins.
List all contracts to be audited: repository URL or deployed addresses, total LOC, key functions you are concerned about (cross-chain calls, admin functions, token economics). Clear scope = accurate quote in hours.
Contact the auditor with your scope. A Singapore-based flat-fee auditor like Innora.ai confirms the price and timeline within a few hours — no week-long sales process.
Work starts immediately. AI pipeline performs taint analysis, pattern matching across 790+ security classes, and generates Foundry test cases for likely vectors. Human experts investigate flagged issues and verify exploitability.
You receive a severity-classified report (Critical/High/Medium/Low/Informational) with a runnable Foundry PoC for every Critical and High finding. You can independently reproduce the exploit before paying.
Fix identified vulnerabilities. One free fix-verification round confirms your patches correctly resolve Critical and High findings.
Payment is due within 48h of report delivery — USDC or wire transfer. No audit starts without agreed scope and pricing, but no money changes hands until you have the report in hand.
Not all audit reports are equal. Many are rubber-stamp exercises that declare a contract "safe" without verifying exploitability. Here is what a credible report must include:
Every Critical/High finding must include a Foundry test that reproduces the attack. "Theoretically exploitable" without PoC = incomplete finding.
Report must list every function reviewed and state explicitly what was included or excluded from scope.
Severity ratings must reference attack prerequisites, impact magnitude, and exploitability — not just pattern detection.
Report should include post-patch verification confirming the fix resolves the finding without introducing new issues.
If your contract uses LayerZero, Hyperlane, Wormhole, or any bridge, the report must explicitly cover cross-chain message validation.
Economic attack vectors (price manipulation, liquidation gaming) require manual review — they cannot be found by pattern-matching tools alone.
Flat fee. Pay after delivery. 24–72h turnaround. AI-assisted pipeline with expert human review. DM or email with your scope to get a price in hours.
[email protected] · innora.ai/audit · @Innora_sg