Code Audits
dApp Audits
Web3 security goes beyond a basic dApp audit 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 through a comprehensive dApp security audit.
150+
audits
completed
$10B+
in client
assets protected
$200B+
in transacted
value secured
300+
crit / high issues found
Consolidated clients
With 5+ 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 full-stack dApp security audits deliver actionable insights and minimal-change fixes. Partnering with a specialist dapp audit firm helps 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 dApp 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 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. We help Web3 businesses audit their dApps before major releases or listings.
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 &
Liquidity
Lending platforms, DEXes, staking, and collateral markets.
NFT &
Collectibles
Marketplaces, launchpads, minting tools, and creator hubs.
Gaming &
Metaverse
Play-to-earn games, trading hubs, and immersive 3D worlds.
Cross-Chain Infrastructure
Bridges, oracle networks, and cross-chain protocol layers.
Frequently Asked Questions
Check out the dApp Audit F.A.Q.
When should I schedule a dApp audit?
You’ll get the most value from a dApp audit before launch and when major features are released, the UI is overhauled or new wallets and protocols are integrated. You should also audit your dApp after any critical security incident in the ecosystem.
What do you need to start a dApp audit?
We typically require access to your code repositories, environment configuration, architecture diagrams, and test or staging deployments. The more context we have, the more effective and efficient the dApp security audit will be.
What does a dApp audit report include?
You receive a detailed report with findings, severity ratings, technical explanations, and practical remediation steps. As a dApp audit company, we also include a summary for non-technical stakeholders so your whole team can understand the impact.
Do you re-test after we fix the issues?
Yes. Once you implement the recommended fixes, we perform a verification pass to confirm that vulnerabilities are resolved and no new issues have been introduced. This re-test is a key part of how we audit your dApp end-to-end.
Can you work with our internal security team or other auditors?
Yes. We often collaborate with in-house teams and other security providers. Our goal is to complement existing smart contract reviews with a focused dApp security audit that covers frontend, API, and off-chain risks.
How do you prioritize issues found in a dApp audit?
We classify findings by severity and exploitability, then prioritize those that can directly impact user funds, data, or core functionality. This helps your team focus first on the highest-impact fixes and ship safer updates faster.