Understand, secure and future-proof your legacy software.
We analyse, document, maintain and modernise long-grown software and replace it step by step or entirely. And when you need something completely new, we build it with AI assistance – at a fraction of what it used to cost.
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Afterwards
Business logic documented
Risks assessed
Automated tests
REST interface
Current, supported platform
The situation
Does this sound familiar?
Many companies and public bodies rely every day on software written 10, 20 or 30 years ago. It works – but it is increasingly becoming a risk.
Knowledge is retiring
Only one person still really understands the system – and they are about to retire, or have already left.
Nobody knows exactly how it works
Documentation is missing or outdated. The rules, data and interfaces behind it are unclear.
Security gaps, no more updates
The programming language, framework, database or operating system no longer receives security updates.
Every change takes weeks
Small adjustments are expensive and risky because nobody knows what else might break.
No connection to modern systems
Interfaces to portals, e-filing, ERP, cloud services or mobile devices are missing.
New obligations, old technology
GDPR, NIS2, security standards, accessibility or e-government requirements that the old system can't meet.
The good news: a legacy application is not a mistake. It often holds decades of valuable business knowledge. We help you preserve that knowledge and make the technology underneath it fit for the future.
Services
Six services – one goal: software that works for you
You can start with any service on its own. Often they build on each other: first understand, then secure, then renew – or build something new straight away.
New applications on a modern software stack – built with AI assistance and therefore at a fraction of what it used to cost.
Learn more
Our expertise
30 years of experience meets AI expertise
AI alone doesn't modernise software. What makes the difference are people who know how long-grown systems really work – and which tool is right for which task. That is exactly the combination we bring.
30 years of software development experience
30years of software development experience
Our company brings together 30 years of software development experience – in almost all common programming languages and systems, from mainframes and client-server applications to the cloud. We know many of the technologies now considered “legacy” from hands-on practice. That's why we understand code nobody else wants to touch any more.
The right AI model for every task
There is no single “AI”. Models differ widely in how well they understand old code, write documentation, generate tests or transform data. From hands-on practice we know which model is best suited to which task – and deliberately use the right one. The result: better quality in less time.
An extensive prompt library
We have built a large collection of detailed, precise prompts – for practically every task that comes up in a software project: code analysis, documentation, refactoring, test generation, migration and new development. Proven prompts deliver reliable, traceable results instead of lucky hits – and save you time and money.
Databases and data architecture
Legacy applications often hold decades of data – usually their most valuable part. We have extensive knowledge of databases, data modelling and data architecture. So we migrate your data safely, clean up legacy clutter and create a solid foundation for new applications, interfaces and analytics.
In short: we combine three decades of software development know-how with the targeted use of modern AI. That makes our work faster and more affordable – and the results reliable.
Decision guide
Keep, modernise or replace?
There is no single right answer. The best path depends on the condition, importance and future of your application. This overview shows the four basic options.
Option
Makes sense when …
Effort
Risk
Maintain & keep running
the application still fits the business and the technology can still be operated securely.
low
low
Modernise
the business logic is sound but the language, framework or platform is outdated.
medium
medium
Partial replacement
some areas urgently need renewal while the rest still does its job.
medium
medium
Full replacement
technology and requirements fundamentally no longer match.
high
high
Our Legacy Check at a fixed price of €2,499 net shows which option is the most economical for you – based on facts, not gut feeling. See what a Legacy Check looks like →
Approach
How we work with you
Clear steps, verifiable results and no surprises. After each step, you decide how to proceed.
1
Initial call
No obligation, by video or phone. You describe the situation, we ask questions. Afterwards, both sides know whether and how we can help.
2
Legacy Check
A compact assessment with a clearly defined scope at a fixed price of €2,499 net. Result: findings, risks, options and a rough effort estimate. See an example
3
Decision
You decide based on facts: keep running, modernise, partially or fully replace.
4
Implementation
In short, verifiable stages with regular interim results. Ongoing operations stay secure at all times.
5
Handover & support
Documentation, knowledge transfer to your team and, if you wish, long-term maintenance from a single source.
Why “neocoding.ai”?
Analysed with AI. Owned by people.
Old codebases are often huge, hard to navigate and written in languages few people still speak. With the right AI model for each task and our proven prompts, we read and understand them much faster. That saves you time and money – without compromising on quality or confidentiality.
AI helps us read code, spot relationships and produce documentation – even across hundreds of thousands of lines.
Reviewed by humans
Every result is reviewed by developers with decades of hands-on experience. AI is a tool, not a decision-maker.
Confidentiality first
We agree with you which tools we use – up to analysis exclusively inside your environment, or without AI at all. Your code is not used to train AI models.
More budget for what matters
Less manual effort for onboarding and documentation means more budget for the actual modernisation.
New software at a fraction of the cost
The same tools make new development much cheaper too. Custom software becomes affordable for organisations that could not justify it before.
Who we help
For SMEs and the public sector
Our clients have one thing in common: they depend on an application that nobody really wants to touch any more.
Small and medium-sized enterprises (SMEs)
Industry software, custom inventory systems, Access databases or Excel macros that have long since become core processes. We understand tight IT budgets and small teams.
Pragmatic solutions instead of large-scale projects
Dedicated contacts and short communication paths
Clearly scoped packages with transparent costs
No vendor lock-in: source code and documentation belong to you
Takeover of applications whose developer is no longer available
Custom software that AI finally makes affordable
Public authorities, municipalities and institutions
Specialist procedures, in-house developments and registry applications that must run reliably – while meeting growing demands for security and digitalisation.
Proposals that fit your procurement procedure, on request based on EVB-IT (German public IT contracts)
Data processing in Germany / the EU, data processing agreement under Art. 28 GDPR
Aligned with BSI IT-Grundschutz and NIS2 requirements
Accessible user interfaces according to WCAG / BITV 2.0
Open standards and open source for digital sovereignty
Integration with e-government services, portals and XÖV interfaces
Technologies
From COBOL to cloud
Our company brings together 30 years of experience with almost all common languages and systems. We work with the technologies that have been running in many organisations for decades – and with the platforms they can sensibly move to.
Typical starting points
COBOL
RPG / AS/400 (IBM i)
Fortran
C / C++
Delphi / Object Pascal
Visual Basic 6 / VBA
Microsoft Access
FoxPro / dBase
PowerBuilder
Oracle Forms
Lotus Notes / Domino
Java EE / J2EE
.NET Framework
PHP 5
Perl
Classic ASP
Excel macros
Shell and batch scripts
Modern target platforms
Java / Spring Boot
current .NET / C#
Python
TypeScript / Node.js
React, Angular, Vue
PostgreSQL
REST / OpenAPI
Docker & Kubernetes
CI/CD pipelines
Linux
Private cloud / on-premises
EU cloud providers
Databases & data architecture
Oracle
IBM Db2
Microsoft SQL Server
PostgreSQL
MySQL / MariaDB
Informix
Sybase / SAP ASE
Microsoft Access
dBase / FoxPro
SQLite
Data modelling
Data migration & ETL
Data quality & cleansing
Data warehouse & reporting
Your technology isn't listed? Get in touch anyway – the methods carry over.
Migration paths
Which path suits your technology?
The most urgent candidates are systems without vendor support – such as Visual Basic 6, FoxPro or ASP.NET WebForms – and systems for which developers are hard to find, such as RPG, Delphi or Notes. This overview shows typical paths for custom applications in small and medium-sized businesses. The target is usually current .NET or Java with a web user interface; which platform fits depends on your infrastructure and your team.
Source technology
Typical target
Urgency
Effort
Recommended approach
Visual Basic 6 / Visual FoxPro
ASP.NET Core + Angular or Blazor
high
medium
New development with data migration; gather business requirements afresh
Access + VBA / Excel VBA
Power Apps or ASP.NET Core + SQL Server
medium
low
Move data to SQL Server; new user interface depending on complexity
ASP.NET WebForms / WCF
ASP.NET Core (Web API) + Angular or Blazor
high
medium
Step by step: extract the backend as an API, replace the user interface module by module
WinForms (.NET Framework)
WinForms or WPF on current .NET, or a web front end
medium
low
Move to current .NET first, then decide on a switch to the web Example report
Delphi
ASP.NET Core or Spring Boot + web front end
medium
high
Document the business logic, then replace step by step via interfaces (strangler pattern) Example report
JSF / Java EE
Spring Boot + Angular or React
medium
medium
Extract services, rebuild the front end separately
IBM i (RPG/COBOL, Db2)
Java or .NET + PostgreSQL or SQL Server
high
high
Put APIs in front of the legacy system first, then replace modules step by step Example report
HCL Notes/Domino
SharePoint/Power Platform or a web application
medium
medium
Take stock of the applications; many can be switched off or replaced by standard tools
Oracle database
PostgreSQL
low
medium
Usually driven by licence costs; the amount of PL/SQL determines the effort
Industry ERP customisations
Standard features or extensions via APIs
medium
medium
Reduce customisations, move custom logic into separate services
Urgency and effort are based on experience and market assessment, not measured figures. In each case, size, condition and data determine the outcome.
Clear proposals, traceable steps and regular results. You always know where your project stands.
Operations come first
No risky big bang. We work with parallel operation, tests and fallback options.
No dependency
Source code, documentation and usage rights stay with you. We rely on open standards.
Knowledge stays in-house
We pass our knowledge on to your team – so you remain independent.
Confidential and secure
Non-disclosure agreements, data processing agreements and careful handling of access and data are a given.
Based in Germany
Headquartered in Thuringia, with contacts in German and English. Remote across Germany, Austria and Switzerland, on site when needed.
FAQ
Frequently asked questions
Your question isn't listed? Just write to us – we're happy to help.
What is a legacy application?
A legacy application is software that is important for your operations but runs on outdated technology, is hard to change, or whose knowledge is held by only a few people. Age alone isn't the deciding factor – even a ten-year-old application can be “legacy”.
Does my legacy application have to be replaced entirely?
In many cases, no. It is often more economical to keep the proven business logic and only modernise the technology or replace individual parts. We only recommend a complete rewrite when it clearly pays off.
How much does modernisation cost?
That depends heavily on the size, condition and goals of the application. This is why we usually start with a Legacy Check at a fixed price of €2,499 net. Afterwards you receive a sound estimate of effort and cost for each possible path. New development benefits most from AI: many projects now cost only a fraction of earlier quotes. Our example Legacy Check shows what the report looks like.
How long does a project take?
Depending on scope, a Legacy Check usually takes a few days to a few weeks. We plan modernisations and replacements in stages, each delivering usable results on its own. You see progress early and can reprioritise at any time.
What if there is no source code or documentation left?
There are still ways forward. We analyse databases, user interfaces, configuration, data flows and the application's behaviour, and we talk to its users. Where legally permitted, we also examine the existing program files.
Will operations continue during modernisation?
Yes – this is especially important to us. We work step by step, test thoroughly and, where necessary, run old and new systems in parallel until everything works reliably.
How do you handle confidential code and sensitive data?
On request, we sign a non-disclosure agreement and a data processing agreement (Art. 28 GDPR). We follow the principle of least privilege, prefer anonymised test data, and only use AI tools with your approval.
Do you work for public authorities and institutions?
Yes. We know the requirements of the public sector – from procurement and EVB-IT to data protection, IT baseline security and accessibility – and prepare proposals that fit your procedure.
Is AI-assisted software just as secure and maintainable?
Yes – when it's done properly. We never let AI write code unchecked. Every change is reviewed by experienced developers, covered by automated tests and documented. We use established, open technologies so that others can maintain your application in the future too.
Can you take over an application from another provider?
Yes. We take over maintenance and further development even if the application was built by another provider or the original developer is no longer available. It starts with an orderly handover including analysis and documentation.
Which AI do you use?
That depends on the task. AI models have very different strengths – in understanding old programming languages, writing documentation, generating tests or transforming data. For each task we choose the model best suited to it, and we work with our own extensive library of proven prompts. We agree with you in advance which tools are used in your project – up to models that run exclusively in your environment.
How much experience do you have?
Our company brings together 30 years of software development experience – in almost all common programming languages and systems, as well as databases and data architecture. We know many of the technologies now considered legacy from hands-on practice. This experience is what allows us to use AI in a targeted and responsible way.
Do you work remotely or on site?
Both. We handle most tasks remotely via secure access. For workshops, interviews or work in isolated networks, we're happy to come to you.
Contact
Let's talk about your application
Send us a short note about what it's about. We usually reply within two business days to arrange a no-obligation initial call.
Helpful to mention (as far as known):
Name and purpose of the application
Technology, age and approximate size
Number of users
The most pressing problem
Desired timeframe
Your contact
Matthias Gleichmann
Development Coordinator
Address
neocor cloud UG (haftungsbeschränkt) Kleinbocka 21a 07589 Bocka, Germany
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