Legacy Code Analysis: Assessing code quality, technical debt and modernisation options for your existing software systems
Before you invest in modernisation, you need to understand what you are working with.
Legacy Code Analysis – Technical Debt Assessment
Many organisations have software that works but they don't know how it will hold up as they grow. A legacy code analysis replaces guesswork with facts. We look at your source code, architecture and infrastructure and find real risks – security holes, old dependencies, and maintainability bottlenecks that slow every new feature.
You get a prioritised action plan, not a generic checklist. You will see which parts are stable, which need work soon and where modernisation pays off most. Refactor, partly rebuild or migrate to a new stack – the analysis gives you the evidence to decide.
What We Analyse
Code Quality
- Architecture and design patterns
- Code complexity and maintainability
- Test coverage and quality
- Dependency health and vulnerabilities
- Documentation completeness
Risk Assessment
- Security vulnerabilities (OWASP)
- Technical debt quantification
- Scalability bottlenecks
- Single points of failure
- Compliance gaps (GDPR, accessibility)
What You Receive
Assessment Report
Detailed findings with severity ratings, code examples and concrete recommendations
Modernisation Roadmap
Prioritised action plan with effort estimates, risk levels and quick wins
Honest Recommendation
Whether to refactor, partially rebuild or start fresh – we tell you what makes economic sense
Legacy Code Analysis: Assessing Your Existing Software Systems
A legacy code analysis is the essential first step before investing in modernisation. By systematically assessing code quality, technical debt and security risks in your existing software systems, we give you the clarity you need to make informed decisions. Our analysis covers architecture, dependencies, test coverage and compliance – resulting in a concrete modernisation roadmap with prioritised actions and effort estimates.
Technical debt accumulates silently. What starts as a shortcut during a sprint becomes an architectural constraint that affects every future change. Our analysis quantifies that debt so you can budget for it and address it strategically rather than reactively. We have assessed codebases in Delphi, Java, .NET, PHP, Python and JavaScript – from monolithic desktop applications to distributed microservice architectures.
Every analysis concludes with a stakeholder presentation where we explain findings in business terms: risk exposure, estimated modernisation effort and the expected return on investment for each recommended action. This ensures both technical teams and decision-makers have a shared understanding of the path forward.
Frequently Asked Questions
How long does a legacy code analysis take?
A typical analysis takes two to four weeks depending on the size and complexity of the codebase. Smaller systems with up to 100,000 lines of code can often be assessed within ten working days. We provide a time estimate after an initial scoping call.
Do you need access to our production environment?
No. We work exclusively with your source code repository and build configuration. If relevant, we may request anonymised database schemas or API documentation, but we never require access to live systems or customer data.
What happens after the analysis?
You receive a detailed report and a prioritised modernisation roadmap. We present the findings to your team and answer questions. If you decide to proceed with modernisation, we can support the implementation – but there is no obligation. Many clients use the report to brief internal teams or other vendors.
Frequently Asked Questions
Legacy Code Analysis
Scope, Duration & Cost
What does the legacy code analysis include?
A structured review of code quality, architecture, performance and security. You get documented findings with severity, impact and effort estimates, plus a prioritised modernisation roadmap.
How long does the analysis take?
Exactly 5 working days from kick-off to presentation. Day 1: access; days 2–4: analysis; day 5: presentation of the risk report.
What does the analysis cost?
We offer a fixed price; there are no hidden costs. The exact price is agreed in an initial call.
What happens after the analysis?
You receive a detailed report and a prioritised roadmap. We present the findings to your team. If you proceed with modernisation, we can support implementation – with no obligation.
Get clarity about your legacy code
A thorough analysis today prevents costly surprises tomorrow.
Book a callGet Clarity About Your Legacy Code
A thorough analysis today prevents costly surprises tomorrow. Let us assess your codebase.