Delphi-to-.NET migration with feature parity, data conversion and pilot ops
For mid-sized companies: transparent cut-over planning—no silent production halt – 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
Why migrate Delphi to .NET?
Delphi remains excellent for native desktop workloads. Long-term, staffing pools, library ecosystems and your integration landscape matter: if you want to grow teams in C# or web stacks, align ERP and cloud connectivity through the .NET ecosystem, or standardise on enterprise identity patterns (.NET, Entra ID, OIDC), a Delphi to .NET migration can reduce total cost of ownership—without rewriting business rules from scratch. We assess whether a strangler-style decomposition or a bounded domain slice is the lowest-risk route.
How does the migration process work?
We begin with a dependable baseline review: modules, persistence, UI flows, batch jobs and external interfaces. Then we define the target—WinForms or WPF for classic rich desktop work, Blazor for browser-first delivery across sites, or .NET MAUI when you need one UI stack across Windows and additional device classes. Work is sliced so production cadence continues: critical domains first, automated tests where feasible, data migration with reconciliations and explicit interface contracts.
What about third-party stacks (DevExpress, TMS, FastReport)?
Where vendors provide .NET equivalents, we can carry capabilities forward or choose controlled alternatives (reporting: SSRS, DevExpress Reporting; grids/trees: respective .NET packages). Where no direct match exists, we encapsulate UI capability and replace incrementally. Reports are not “blindly” converted—layouts and edge cases are validated with business stakeholders. COM and ActiveX dependencies are replaced with supported .NET libraries or bounded interop seams with a clear sunset plan.
Which .NET target fits WinForms, WPF, Blazor or MAUI?
| Criterion | WinForms | WPF | Blazor | .NET MAUI |
|---|---|---|---|---|
| Similarity to Delphi VCL | Very high | Medium (MVVM) | Lower (web model) | Medium |
| Learning curve | Low for desktop teams | Medium | Medium–higher | Medium |
| Future-proofing | Stable, classic UI limits | Strong on Windows desktop | Strong for browser-centric roadmaps | Depends on device mix |
| Cross-platform reach | Windows-focused | Primarily Windows | Browser clients | Broad device mix possible |
| UI modernity | Classic | Highly flexible styling | Modern for distributed users | Modern, platform policies apply |
What does a Delphi-to-.NET migration cost?
Cost depends on domain breadth, data migration, reporting estate and interfaces—not a single LOC metric. After an initial assessment we provide phased planning with credible ranges and optional fixed scopes for well-bounded packages. For Delphi-specific context see Delphi development; for data and BI follow-ups see database & business intelligence.
Typical dependency moves
We move data access from BDE or legacy ADO paths to Entity Framework Core or Dapper depending on performance and team skill. Crystal Reports or legacy viewers are mapped to SSRS, DevExpress Reporting or other sustainable targets—including layout workshops. COM and ActiveX are replaced with NuGet-based components or encapsulated services so no hidden process coupling remains in production.
Up to 50% of your investment via BAFA/KfW
Use our funding calculator to see which government grants may apply to your project.