Code Audits
dApp Audits
Web3 security goes beyond contracts and traditional smart contract audits. We audit your dApp’s frontend, backend, and user flows to uncover vulnerabilities that could compromise user funds or data.
100+
audits
completed
$8.2B
in client assets protected
$183.2B
in transacted value secured
300+
crit / high issues found
Consolidated clients
With 3+ years
of blockchain security experience
Our team combines automated tools with in-depth manual reviews, threat modeling, and Web3 security best practices. Whether you’re building DeFi platforms, NFT marketplaces, or complex Web3 infrastructure, our dApp audits deliver actionable insights and minimal-change fixes, helping you ship faster, safer, and with confidence.
What is a dApp & Frontend Audit?
A dApp Audit secures the user-facing layers of your application. Even if your smart contracts are secure, frontend exploits, phishing attacks, and API vulnerabilities can compromise user funds. As a dApp audit company, we test web interfaces, wallet connections, authentication flows, and API interactions to ensure a frictionless and secure Web3 experience. This approach provides a comprehensive dApp security audit that keeps your project safe with every interaction.
What Makes dApp Different & Why Is It at Risk?
A decentralized application (dApp) combines blockchain logic with off-chain components like APIs, databases, and user interfaces. While the blockchain layer is often the most scrutinized, most real-world breaches happen in these off-chain areas.Our audits focus on the entire ecosystem, not just the smart contracts, ensuring that every interaction between your frontend, backend, and blockchain is secure.
Where dApps Threats Hide
Frontend
Risks
- Cross-Site Scripting (XSS)
- Wallet phishing attempts
- Insecure authentication flows
API & Backend
Risks
- Leaked API keys or endpoints
- Insufficient input validation
- Unauthorized data access
Blockchain
Integration Risks
- Incorrect smart contract calls
- Misconfigured cross-chain bridges
- Data inconsistency between on-chain and off-chain systems
Our Smart Contract Audit Process
Scoping and Planning
We define the dApp audit engagement scope, timeline, and key focus areas based on your project’s requirements.
Research & Analysis
Our dApp security audit team studies the architecture, documentation, and technical details to fully understand the system.
In-Depth Review
As a trusted dApp audit company, we conduct a thorough security assessment, identifying vulnerabilities, inefficiencies, and risks.
Validation
Using automated and manual techniques, we audit your dApp under real-world conditions to validate the system under real-world conditions.
Reporting & Recommendations
We deliver clear findings with actionable steps to enhance your application’s security and performance.
Verification
We assist your team with fixes to confirm all issues have been resolved before mainnet deployment.
Hear from our Clients
We Don’t Stop at the Report
Many audit firms hand over a vulnerability list and walk away. At Three Sigma, we stay with you through the remediation phase, ensuring every recommendation is implemented correctly and securely. That means fewer risks left unaddressed, and a faster path to a secure launch
Post-audit support is included
to help your team implement fixes and validate their effectiveness.
Check out our previous Case Studies and their reports, outlining all identified vulnerabilities, their severity, and actionable remediation steps.
What You Gain
from a Three Sigma Audit
Our Web3 dApp & frontend security audits are more than a checklist, they’re an investment in your project’s success.
Prevent costly exploits before they impact your users.
Increase trust with investors, partners, and the Web3 community.
Accelerate compliance with evolving blockchain security standards.
Protect brand reputation in an industry where trust is currency.
Industries We Secure
Our audits have helped secure decentralized applications across multiple verticals.
DeFi
Lending platforms, DEXs, and staking protocols.
NFT & Collectibles
Marketplaces, launchpads, and minting platforms.
Gaming & Metaverse
Play-to-earn games, asset trading hubs, and immersive experiences.
Cross-Chain Infrastructure
Bridges, oracles, and interoperability layers.
Frequent answers and questions
Check out the dApp Audit F.A.Q.
Why is frontend security important for Web3 apps?
Even if your smart contracts are secure, frontends can be exploited through phishing attacks, API vulnerabilities, and wallet manipulation. A dApp security audit addresses these risks before they can impact users.
What are the most common frontend security risks for dApps?
XSS, CSRF, API leaks, wallet phishing attacks, and compromised authentication flows.
How does a dApp audit differ from a smart contract audit?
A dApp audit focuses on user-facing components, APIs, and backend security, while a smart contract audit reviews the blockchain logic. An experienced dApp audit company will cover both areas if needed.
Can a dApp audit prevent phishing scams?
Yes. We analyze wallet interactions, authentication mechanisms, and UI security to prevent malicious transaction hijacking. In short, we audit your dApp to ensure safe user transactions.
Will I get recommendations after a dApp audit?
Yes. A detailed report will outline each issue found and practical steps to fix it.
How long does a dApp audit take?
Most audits take two to eight weeks, depending on the dApp’s size, complexity, and number of integrations.