Legacy Software Migration
We modernize your legacy software without stopping your business. Incremental migration from VB6, Access, legacy .NET, or Excel to modern web technologies and cloud. No big bang, no risks, no interruptions.
Your legacy software works, but it's a growing risk
Thousands of companies operate with software developed 15-20 years ago that still works but has become an operational risk. Applications in Visual Basic 6, shared Access databases, ERPs on .NET Framework 2.0, or critical systems that depend on a single developer nearing retirement. The system works today, but every passing day makes it harder and more expensive to maintain.
The risks of legacy software go far beyond outdated aesthetics. Security is the most critical: systems without security patches for years, obsolete authentication protocols, and unencrypted databases are a gift for attackers. Maintenance costs grow exponentially: finding developers who know VB6 or COBOL is increasingly difficult and expensive. Scalability is nonexistent: systems designed for 10 users cannot handle 100.
But the biggest trap of legacy software is that it appears to work. Users have adapted to the system, know its quirks, and have developed workarounds for its limitations. Migration seems like an unnecessary risk. Until a server fails, the Access database gets corrupted, or the developer who maintained the system leaves. Then migration becomes an emergency, and emergencies are expensive.
Our approach is the exact opposite: planned, incremental, risk-free migration. We use the strangler fig pattern, inspired by the strangler fig tree that grows around the old tree until it replaces it. We build the new system around the old one, migrating functionality by functionality, with both systems running in parallel until the legacy system can be disconnected with confidence.
Risk-free migration
Strangler fig pattern
Modern infrastructure
Access from anywhere
Our 4-phase migration process
Assessment, planning, incremental execution, and validation. No surprises.
1. Assessment
We audit your complete legacy system: source code, database, integrations, dependencies, documentation (if it exists), and team tribal knowledge. We map every functionality, identify business value of each module, and evaluate migration complexity. The result is a complete inventory with clear priorities.
2. Planning
We define the migration strategy: what gets rewritten, refactored, or discarded. We choose the modern tech stack, design the new architecture, and plan the migration order by business value and risk. We define validation criteria and rollback plans for each phase.
3. Incremental execution
We migrate module by module using the strangler fig pattern. Each module is developed, tested in parallel with the legacy system, validated with real users, and deployed to production. The legacy system keeps running throughout. No big bang, no downtime, no data loss risk.
4. Validation & closure
Each migrated module undergoes functional validation (users confirm it works as well or better), data validation (complete data integrity), and performance validation (the new system is faster). When all modules are migrated and validated, the legacy system is disconnected with confidence.
Where you come from, where you're going
We migrate from
We migrate to
Is your legacy software a risk? Let's talk.
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Häufig gestellte Fragen about legacy migration
How much does a legacy system migration cost?
Can migration happen without stopping the business?
What if the legacy code has no documentation?
How long does a complete migration take?
Modernize your legacy software
We audit your current system and deliver a detailed migration plan with costs, timelines, and priorities. No commitment.