Convert Delphi to C# & .NET in weeks, not years.
Delphi developers are retiring. Embarcadero licenses keep climbing. Your VCL components, BDE database calls, and Object Pascal codebase are blocking every cloud, security, and modernization initiative on your roadmap.
VELO is different. Our purpose-built agentic AI combines deterministic precision with 35+ years of modernization expertise to convert your Delphi application into clean, alpha-ready C#/.NET, with 100% of your business logic preserved and zero AI hallucinations.
Delphi was built for a different era of software
Object Pascal still runs critical applications across financial services, manufacturing, healthcare, and government. But the platform underneath it is aging out, and every quarter you delay raises the cost and risk of staying on Delphi.
Shrinking talent pool
Trained Delphi and Object Pascal developers are retiring faster than universities are replacing them. Filling a senior Delphi role now takes months, not weeks, and salaries reflect the scarcity.
Rising license & maintenance costs
Embarcadero licensing, third-party VCL component renewals, and platform maintenance fees keep climbing. Every patch and integration takes longer because the ecosystem is consolidating.
Blocks cloud & AI strategy
Monolithic Delphi architecture, BDE or proprietary data access, and tightly coupled VCL forms cannot take advantage of Azure, modern APIs, or AI services. Your roadmap stalls until Delphi is modernized.
Manual rewrites and generic AI tools don't get Delphi to production
C# and Object Pascal differ at every level: memory management, type system, component model, and architecture. Two common approaches both fall short:
Manual rewrites: too slow, too risky
Hand-rewriting a Delphi application to C# routinely runs 18 to 36 months at enterprise scale. VCL forms get reimagined incorrectly, decades of embedded business logic gets lost in translation, and the original Delphi developers rarely survive the project intact.
Generic AI tools: fast, but unreliable
Copilot and Claude Code generate code. They don't validate it. Without deterministic verification, you get hallucinated APIs, broken pointer arithmetic, and silent logic drift, none of which surface until your QA team finds them weeks later.
The business value of AI-powered Delphi migration
VELO is purpose-built for legacy modernization. Three value pillars, one outcome: a modern .NET application your team can own and your CFO can defend.
Speed & Cost
- Alpha-ready code in weeks, not years
- 40 to 50% faster delivery vs. manual rewrites
- Up to 50% lower total modernization cost
Accuracy & Continuity
- 100% business logic preservation, guaranteed
- Deterministic validation with zero AI hallucinations
- Full audit trails and explainability for every transformation
Future Readiness
- Clean, human-readable C# your team can extend
- No binary runtime dependencies, Visual Studio native
- Built on Microsoft Foundry, Azure-ready by design
How VELO migrates your Delphi application
Five stages, fully managed by GAPVelocity AI. You bring the codebase. We deliver the modern application.
VELO Analysis
Specialized agents examine VCL forms, units, third-party components, and database dependencies to map the full application.
Deterministic Mapping
Our patented engine maps Object Pascal to C# and VCL components to their .NET equivalents with compiler-grade precision.
Code Generation
Conversion agents generate clean C# and .NET code following current best practices, with Entity Framework patterns for data access.
QA Validation
QA agents verify functional parity. Every transformation is tested against the original Delphi behavior before delivery.
Delivery
Alpha-ready code, documentation, and a knowledge transfer session so your team can take ownership in Visual Studio.
What VELO handles for Delphi migrations
Every Delphi construct that traditionally breaks rewrites: handled.
Object Pascal to C# translation
Pascal syntax, units, classes, interfaces, and properties are translated to clean, idiomatic C# that any .NET developer can read on day one.
VCL form & component mapping
VCL forms and standard components are mapped to their .NET equivalents. Third-party components are identified and matched to modern alternatives or wrapped for compatibility.
BDE & FireDAC to Entity Framework
Legacy data access layers are mapped to Entity Framework, ready for SQL Server, Azure SQL, Oracle, or your cloud database of choice.
Memory management & type system
Manual memory management, pointer usage, and Pascal type quirks are translated to .NET's managed memory model with zero behavioral drift.
No binary runtime dependencies
Output is human-readable C# that compiles natively in Visual Studio. No proprietary runtimes, no licensing surprises, no vendor lock-in.
Architecture refactoring
Monolithic Delphi structures are refactored into modular .NET architecture, ready for modern testing, CI/CD, and incremental cloud deployment.
Frequently asked questions about Delphi modernization
How long does a Delphi migration take?
Most Delphi migrations with VELO complete in weeks rather than the 18 to 36 months typical of manual rewrites. Final timeline depends on codebase size, third-party component complexity, and last-mile production requirements. Your assessment will give you a precise estimate.
Do you preserve business logic?
Yes, 100%, guaranteed. VELO's deterministic engine maps every Object Pascal construct to its modern .NET equivalent at the semantic level, with QA agents verifying functional parity before delivery. No silent logic drift, no hallucinated behavior.
Is this a full rewrite?
No. VELO is an automated transformation, not a rewrite. Your existing business logic, data flows, VCL forms, and user workflows are preserved and translated, not reimagined from scratch. That's how we get to weeks instead of years.
What target platforms are supported?
VELO migrates Delphi to modern C#/.NET for desktop applications, with Blazor or Angular options for web targets, and Azure-native deployment patterns for cloud delivery. The output is human-readable C# with no binary runtime dependencies.
What about third-party VCL components?
VELO identifies third-party components during the analysis phase and maps them to modern .NET alternatives where available. For proprietary or custom components, our AI Squad creates wrappers or replacements during the last-mile work, with full documentation.
Can we modernize incrementally?
Yes. VELO supports phased migrations. Many customers begin with a proof-of-concept on a representative subset of their Delphi codebase via our Free Trial or ByteInsight assessment, then expand to full migration once they've validated the approach.
What happens post-migration?
VELO delivers alpha-ready code that compiles and has been validated for functional equivalence. Our AI Squad handles the last-mile work to get you to production: business-logic edge cases, integration testing, and deployment. Knowledge transfer is included so your team owns the modern codebase from day one.
Legacy application modernization, delivered at enterprise scale
A global enterprise replaced a critical Delphi application with a modern, cloud-ready .NET app. Every business rule preserved, the original development team retained, and zero downtime to operations.
Backed by 35+ years of modernization expertise
VELO isn't a generic AI wrapper. It's the product of three decades of legacy migration work, codified into a hybrid AI system that combines deterministic precision with agentic flexibility.
Microsoft Solutions Partner
Digital & App Innovation (Azure) certified. VELO is built on Microsoft Foundry and tuned for Azure-native delivery.
Enterprise security & compliance
Runs in your Azure tenant. Your data, under your control. Audit trails and explainability for regulated industries.
Hybrid AI approach
Deterministic AI for known patterns. Agentic AI for context-dependent transformations. Expert engineers for last-mile production readiness.
Trusted by enterprises worldwide
"GAP tools create readable, maintainable, quality code. GAP uses familiar architecture and patterns which made it easy to immediately step into the code."
"GAP seemed the only one that sorted out the details, not only the basic issues of a migration engagement. Its product included unique, powerful features that turned out to be very valuable for this specific project."
Trusted by 80% of the Global 2000
Go deeper on Delphi modernization
VELO: Agentic AI Modernization
See how VELO's hybrid AI architecture delivers modernization at enterprise scale.
Learn about VELO →ByteInsight: Free Code Assessment
Run a no-cost analysis of your Delphi codebase and get a modernization readiness score.
Run a free assessment →Migration Methodology
Our proven framework for de-risking enterprise legacy modernization, from assessment to production.
View the methodology →Ready to modernize Delphi?
See your code modernized. Explore VELO or talk to a modernization engineer about your Delphi application.
