🔒 NDA Before Access · 👁️ Read-Only Review · 🧑💻 Senior Engineer-Led · 📋 Fixed Scope & Price
Source Code Audit Services
An independent review of your codebase's quality, security, maintainability, and architecture. Whether you're inheriting code, buying software, or planning modernization, you'll know exactly what you have and what to fix first.
Do You Really Know What's in Your Codebase?
Code is the most valuable, and least visible, asset in a software business. Screens and demos show what an application does. They don't show how it's built, how risky it is, or how expensive it will be to change.
A source code audit is the right step if:
You're taking over code from an agency, freelancer, or former development team
You're acquiring, or investing in, a software product or company
Development has slowed down, and every change breaks something else
Your developers are asking for a rewrite and you need an independent opinion
You're planning modernization, migration, or a major new feature set
You're facing an enterprise security review, compliance audit, or client due diligence
You paid for software development and want to verify the quality of what was delivered
Your original developers have left, and nobody fully understands the system
A source code audit gives you an objective, evidence-based view of your code, so decisions are based on facts, not opinions.
Common Problems a Code Audit Uncovers
Problem | What It Looks Like | Business Risk |
Security vulnerabilities | Injection flaws, weak authentication, hardcoded credentials | Data breach, legal liability, lost customers |
High technical debt | Workarounds, quick fixes, and outdated patterns accumulated over years | Every new feature costs more and takes longer |
Poor code structure | Huge files, tangled dependencies, business logic mixed into UI code | Changes break unrelated features |
Duplicated logic | The same functionality copied in multiple places with small differences | Bugs fixed in one place stay broken in others |
Outdated frameworks and libraries | Unsupported language versions, abandoned packages, known CVEs | Security exposure and expensive forced upgrades |
Missing or weak tests | Little or no automated test coverage | Every release is a risk |
Poor documentation | No architecture docs, unclear setup, knowledge held by one person | Onboarding is slow and key-person dependency is high |
Performance bottlenecks | Inefficient queries, memory leaks, blocking operations | Slow application and rising infrastructure costs |
Licensing risks | Open-source libraries with restrictive or incompatible licenses | Legal exposure, especially during acquisition |
Scalability limits | Architecture that can't grow with users, data, or features | Expensive re-architecture at the worst possible time |
What Our Source Code Audit Covers
Area | What We Assess |
Code Quality | Readability, complexity, duplication, naming, consistency, dead code, coding standards |
Architecture | Structure, modularity, layering, separation of concerns, dependencies, design patterns |
Security | OWASP Top 10 weaknesses, authentication, authorization, input validation, secrets, cryptography |
Technical Debt | Workarounds, deprecated patterns, outdated components, refactoring priorities |
Dependencies | Outdated libraries, known vulnerabilities (CVEs), abandoned packages, version conflicts |
Open-Source Licensing | License inventory, copyleft obligations, incompatible license combinations |
Performance | Database queries, algorithm efficiency, caching, memory usage, resource handling |
Testing | Test coverage, test quality, critical untested areas, test automation |
Maintainability | Documentation, setup complexity, onboarding difficulty, key-person risk |
Scalability | Ability to handle growth in users, data, integrations, and features |
DevOps & Deployment | Build process, CI/CD, environment configuration, deployment reliability |
Data Handling | Database design, data integrity, migrations, sensitive data handling |
Languages and Frameworks We Audit
Language | Frameworks & Platforms |
PHP | Laravel, Symfony, CodeIgniter, WordPress, Magento, custom PHP |
Java | Spring Boot, Spring MVC, Jakarta EE, Hibernate, Android |
Python | Django, FastAPI, Flask, data and ML pipelines |
JavaScript / TypeScript | Node.js, Express, NestJS, React, Next.js, Angular, Vue |
C# / .NET | ASP.NET Core, .NET Framework, Blazor, legacy WebForms |
Ruby | Ruby on Rails |
Go | Gin, Echo, microservices |
Mobile | Swift, Kotlin, React Native, Flutter |
Databases | PostgreSQL, MySQL, SQL Server, Oracle, MongoDB |
Legacy systems welcome. We audit older codebases, including outdated PHP versions, .NET Framework, legacy Java, and monolithic applications, to assess whether they should be refactored, modernized, or replaced.
Our Audit Approach
Automated Analysis
Static analysis, dependency scanning, license scanning, and complexity metrics give a measurable baseline across the whole codebase.
Manual Expert Review
Senior engineers review architecture, business logic, security-critical code, and design decisions. These are the areas where automated tools miss the most important problems.
Evidence-Based Findings
Every finding references specific files, modules, or patterns, so your team can verify and act on it.
Business-Focused Prioritization
Findings are rated by severity and business impact, not just technical purity, so you fix what matters most first.
How the Source Code Audit Works
1. Scoping Call
We learn why you need the audit (handover, acquisition, modernization, security, or quality), then review the codebase size, technologies, and priorities.
2. NDA and Secure Access
We sign an NDA and get read-only access to your repository. Your code is never modified, shared, or retained after the engagement.
3. Automated Scanning
We run static analysis, dependency, license, and security scans to measure code health across the entire codebase.
4. Manual Review
Our engineers examine architecture, critical modules, security-sensitive flows, and the areas of highest business risk.
5. Findings Report
You receive a structured report with scores, findings, evidence, severity ratings, and recommendations.
6. Walkthrough Call
We present the findings to your team, investors, or stakeholders, and answer technical and business questions.
What You Receive
Executive summary: overall code health, top risks, and a clear verdict, written for non-technical decision-makers
Code health scorecard: ratings for quality, security, architecture, maintainability, testing, and scalability
Detailed findings: each issue with file-level evidence, severity, business impact, and a recommended fix
Technical debt assessment: where debt is concentrated and the estimated effort to reduce it
Dependency and license report: outdated and vulnerable libraries, plus the open-source license inventory
Refactor vs rebuild recommendation: an independent assessment of whether the codebase should be improved, partially rewritten, or replaced
Prioritized roadmap: immediate fixes, short-term improvements, and long-term architecture changes, with effort estimates
Walkthrough call: a findings presentation for your team or stakeholders
Typical Source Code Audit Scenarios
These examples show common situations, the issues that typically surface, and how organizations use the results.
Scenario 1: Taking Over Code From a Development Agency
Stack: Laravel + Vue.js + MySQL
Audit: Full Source Code Audit
Situation: A company paid an outsourced agency to build its customer portal. The relationship ended, and a new in-house team needs to take over, but the handover documentation is minimal and bugs keep appearing.
Common findings:
Business logic scattered across controllers, views, and database triggers
Outdated framework version that no longer receives security updates
Hardcoded credentials in configuration files committed to the repository
Almost no automated tests, and no documentation for local setup or deployment
What happens next: The new team rotates exposed credentials, upgrades the framework, and documents setup and deployment. They follow the roadmap to restructure the most fragile modules first, and feature development resumes without constant regressions.
Scenario 2: Technical Due Diligence Before Acquiring a Software Product
Stack: Java (Spring Boot) + Angular + PostgreSQL
Audit: Full Source Code Audit + License Review
Situation: An investor is acquiring a B2B software company. The product demos well, but the buyer needs independent evidence of code quality, security, scalability, and IP risk before signing.
Common findings:
Core modules dependent on one original developer, with little documentation
Several open-source components with licenses that require legal review
Dependencies with known security vulnerabilities
Architecture able to support current customers, but needing work before the planned growth
What happens next: The buyer uses the report to negotiate remediation commitments and knowledge-transfer requirements into the deal terms, and to budget accurately for post-acquisition engineering work.
Scenario 3: Legacy Application: Refactor or Rebuild?
Stack: Legacy PHP + jQuery + MySQL ·
Audit: Full Source Code Audit
Situation: A business runs its operations on a 10-year-old custom PHP application. The developers want a full rebuild, which is costly, while management wants an independent opinion before committing budget.
Common findings:
Unsupported PHP version and deprecated functions throughout
Some modules well structured and stable, others heavily tangled
SQL queries built from raw user input in older modules
Database design mostly sound, despite the application-layer problems
What happens next: Instead of a full rewrite, the business chooses incremental modernization. It patches security issues first, upgrades the PHP version, keeps the stable modules and the database, and rebuilds only the most problematic modules over time. It avoids the cost and risk of a big-bang rewrite.
Source Code Audit Pricing
Focused Code Audit
Starting at $799 · 5–7 business days
For small codebases, or a targeted review of one application area.
Codebase up to ~25,000 lines
Automated quality, dependency, and security scanning
Manual review of critical modules
Code health scorecard
Top 15 prioritized findings
30-minute walkthrough call
Full Source Code Audit
Starting at $2,499 · 2–3 weeks
For production applications, code handovers, and modernization planning.
Codebase up to ~150,000 lines
Complete quality, architecture, security, and performance review
Technical debt assessment with effort estimates
Dependency and open-source license report
Refactor vs rebuild recommendation
Prioritized roadmap
60-minute walkthrough call
14 days of follow-up Q&A
Get a Full Source Code Audit → (Most Popular)
Due Diligence & Enterprise Audit
Custom pricing · 2–6 weeks
For acquisitions, investments, large codebases, and multi-application portfolios.
Large or multiple codebases and repositories
IP, licensing, and key-person risk assessment
Scalability and post-acquisition engineering cost estimate
Team and development process review
Investor-ready executive report
Stakeholder and deal-team presentation
Final pricing depends on codebase size, number of repositories, languages, and audit objectives. Confirmed after a free scoping call.
Source Code Audit vs Related Services
Service | What It Answers | When to Choose It |
Source Code Audit | What condition is our codebase in, and what should we fix first? | Handover, acquisition, modernization, or quality concerns |
AI-Generated Code Audit | Is our AI-built app secure, stable, and production-ready? | Your app was built with Claude Code, Lovable, Bolt, or Cursor |
Web Application Security Audit | Where is our web app vulnerable, and how do we fix it? | Security is the main concern |
Mobile App Security Audit | Are our iOS and Android apps and their APIs secure? | You have a mobile app handling sensitive data |
Built your app with AI coding tools? See our AI-Generated Code Audit →
Security the main concern? See our Web Application Security Audit →
After the Audit: We Can Help You Act on It
An audit gives you the roadmap. If you need engineers to execute it, our team can take over.
Critical security and dependency fixes
Refactoring and technical debt reduction
Framework and language version upgrades
Legacy application modernization
Test automation and CI/CD setup
Documentation and knowledge transfer
Ongoing development and maintenance
Get Help Implementing the Roadmap →
Frequently Asked Questions
What is a source code audit?
It's an independent, structured review of an application's codebase that assesses code quality, security, architecture, technical debt, dependencies, licensing, and maintainability. You receive prioritized findings and recommendations.
How much does a source code audit cost?
A Focused Code Audit starts at $799, and a Full Source Code Audit starts at $2,499. Due diligence and enterprise audits are priced by scope. The final price depends on codebase size and objectives, and is fixed after a free scoping call.
How long does a code audit take?
A Focused Code Audit takes 5–7 business days. A Full Source Code Audit takes 2–3 weeks. Due diligence audits can be scheduled around deal timelines.
Which programming languages do you audit?
We audit PHP, Java, Python, JavaScript and TypeScript, C# and .NET, Ruby, Go, Swift, and Kotlin, along with frameworks such as Laravel, Spring Boot, Django, Node.js, React, Angular, and ASP.NET, including legacy versions.
Is our code safe with you?
Yes. We sign an NDA before access, use read-only repository access, never modify your code, and delete all copies after the engagement.
Can you audit code for a software acquisition or investment?
Yes. Our Due Diligence & Enterprise Audit covers code quality, security, scalability, open-source licensing, key-person risk, and estimated post-acquisition engineering effort, in a report designed for investors and deal teams.
Should we refactor or rebuild our application?
That's one of the most common reasons for an audit. Our Full Source Code Audit includes an independent refactor vs rebuild recommendation based on evidence, not developer preference.
What's the difference between a code audit and a code review?
A code review usually checks individual changes before they're merged. A code audit assesses the entire codebase at once, covering architecture, security, technical debt, and long-term risk, and delivers a formal report and roadmap.
Do you audit legacy applications?
Yes. We regularly assess older codebases, including outdated PHP, .NET Framework, and legacy Java systems, to determine whether to fix, modernize, or replace them.
Can you fix the issues found in the audit?
Yes. Our engineers can implement the roadmap, from security fixes and upgrades to refactoring and full modernization.
Make Your Next Software Decision With Evidence
Get an independent, expert assessment of your codebase before you inherit, buy, rebuild, or scale it.