Legacy code analysis – hard metrics instead of gut feel

250+ projects · 5.0 on Google · 100% in Germany

Legacy code analysis with hard metrics—not gut feel

For mid-sized companies: we make debt visible for leadership and the next funding round – delivery and project ownership from Germany (Leer/East Frisia), named contacts, no offshore guesswork.

250+ delivered projects
5.0 stars on Google
100% engineering in Germany

Book a no-obligation strategy call Map your project in 2 minutes

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)

Project references

Selected case studies from our project work

Concrete examples with measurable outcomes — swipe through matching references or open the full case study.

Legacy code analysis

Legacy code analysis for technology due diligence

Buyers needed credible technical facts before signing.

View case study →

View all legacy modernization references

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.

The analysis is the entry point to our broader replace legacy software hub service. The report stays useful whether you implement with us, brief another vendor or rebuild specific modules through modernising your legacy software — no obligation to a follow-up engagement.

30-minute intro call: Legacy Code Analysis

On the scheduling page, pick a free slot for a 30-minute intro call about Legacy Code Analysis – straightforward next steps.

Free & non-binding · 30-minute intro call

Book next available slot

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. A larger codebase can extend to two to four weeks; we provide a time estimate after an initial scoping call.

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. Many clients use the report to brief internal teams or other vendors.

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.

Björn Groenewold – Geschäftsführer Groenewold IT Solutions

Get clarity about your legacy code

A thorough analysis today prevents costly surprises tomorrow.

Book a call

Services

Get Clarity About Your Legacy Code

A thorough analysis today prevents costly surprises tomorrow. Let us assess your codebase.

Free Consultation Replace legacy software: next steps

Scope: Legacy code analysis vs. delivery and integration

Legacy code analysis and due diligence before budget decisions—not modernization delivery on legacy modernization.

After analysis, interfaces and integration via API integration and system integration.

Estimate your project costs

Use our interactive calculator for a first budget indication—free and non-binding.

Thorsten Frieling – Projektmanagement

Open cost calculator

Alternatively:Book a consultation

Up to 50% of your investment via BAFA/KfW

Use our funding calculator to see which government grants may apply to your project.

Björn Groenewold – Managing Director

Calculate funding Funding consulting

Why Legacy Code Analysis?

Legacy Code Analysis is most effective when it is aligned with your business goals, existing systems, and team capabilities. At Groenewold IT Solutions we combine product thinking, clear architecture, and hands-on delivery so that every project delivers measurable value. We address operational, compliance, and performance aspects early so that later releases stay on track.

Our approach to Legacy Code Analysis emphasises transparent backlogs, close collaboration with your stakeholders, and incremental delivery. Whether you need a discovery workshop, an MVP, or a full-scale implementation, we define scope, effort, and success criteria up front. With over 250 completed projects we have the experience to recommend the right level of investment and the right next steps for your situation.

Explore our services overview for the full portfolio, our topic pages for in-depth articles linked to each service, and the IT Glossary for key terms. For books and practical guides by Björn Groenewold, see publications. If you would like to discuss your project, we are happy to clarify scope, priorities, and a realistic timeline in a short consultation.

Topic overview & articles

Our topic overview links related articles and entry points alongside this service page.

All topics: Legacy Code Analysis →Deutsche Themenseite →

Service cluster

Related services for System integration interfaces: connect APIs, ERP & legacy

Quick orientation for APIs, system landscapes, ERP, Microsoft 365 and legacy – with separate entry points for interface and integration projects.

Go to category overview API & interface development System integration ERP implementation Legacy modernization Modernise legacy software VB6 replacement All services

Legacy code analysis with hard metrics—not gut feel

For mid-sized companies: we make debt visible for leadership and the next funding round – delivery and project ownership from Germany (Leer/East Frisia), named contacts, no offshore guesswork.