Legacy application modernization

Modernize WINDEV and WEBDEV applications without a big-bang rewrite

Keep the value of your existing applications and data while moving progressively toward an open, sovereign and AI-powered application platform.

Executive answer

Convertigo gives IT teams a controlled migration path beyond a proprietary WLanguage estate. Reuse existing SQL databases, rebuild priority screens and APIs, run old and new applications side by side, and move application by application.

Last verified: September 3, 2026

Assess your application estate See the migration path

Factual note: PC SOFT’s 2026 communication introduces commercial offers based on “sessions” alongside development subscriptions. The exact scope, included sessions, discounts and prices depend on each order form and negotiated contract. This page does not claim that every customer receives identical terms.

Why review the roadmap now?

A change of ownership and evolving application economics can justify a strategic review

PC SOFT’s 2026 commercial model

Subscription-based access to WINDEV, WEBDEV and WINDEV Mobile development environments.
New “session” metrics associated with the use of deployed WINDEV and WINDEV Mobile solutions.
WEBDEV is addressed through a different infrastructure and usage model.
Actual obligations remain contract-specific and must be checked in the order form.

Convertigo’s operating model

Unlimited professional developpers
Unlimited applications.
Enterprise pricing based on internal users or actual external application usage.
Free open-source Community Edition for self-hosted development and deployment.

PC SOFT’s recent change of ownership may concern some CIOs, particularly when combined with changes to licensing and application-usage economics. This is a legitimate moment to reassess long-term costs, technological dependency, sovereignty and exit options.

At a glance

Two different approaches to application economics and control

Comparison of PC SOFT’s 2026 approach and Convertigo
Decision criterion	ConvertigoOpen-source platform	PC SOFT 2026Contract-specific
Developer access	Unlimited developers studios	Subscription per development licence
Application usage	Internal users or actual external usage in paid editions	Session-based metrics may apply to deployed solutions
Technology model	Open-source platform using standard web technologies	Proprietary WLanguage ecosystem
Deployment choice	On Premises, managed sovereign SaaS or customer-selected cloud	Depends on product, server and contract
Modernization strategy	Progressive coexistence and application-by-application migration	Continue maintaining the existing application estate
Community option	Free Community Edition, self-hosted	No open-source edition

A controlled transition

Modernize in four practical stages

The objective is not to erase years of business knowledge. It is to preserve what matters, open the architecture and replace risk progressively.

1. Map and prioritize

Inventory WINDEV and WEBDEV applications, databases, interfaces, users and business criticality. Select a contained, valuable pilot rather than starting with the largest system.

2. Reuse existing data

When the application uses SQL Server, Oracle, PostgreSQL or MySQL, Convertigo can connect to the same database. Existing data remains in place while new services and screens are introduced.

3. Generate the new application layer

Tigo, Convertigo’s native AI agent, helps generate connectors, APIs, back-end services, screens, forms, navigation, workflows and CRUD operations.

4. Coexist, validate and expand

Run the current and modernized applications side by side, validate business rules with users, then repeat the method on the next priority application.

What about HFSQL? A short architecture assessment determines whether to expose services around HFSQL, use an available external access path, or migrate selected data progressively. The right route depends on the application and database topology.

AI-assisted delivery

Tigo is native. MCP keeps the platform open to other agents.

Tigo inside Convertigo

Tigo works directly with the application model and platform capabilities. It accelerates the repetitive foundation while developers retain architectural control and validate specific business rules.

External agents through MCP

Convertigo exposes its capabilities through MCP, allowing teams to connect agents such as Mistral Vibe, Codex and other approved tools while selecting AI models that match sovereignty and governance requirements.

Sovereignty and reversibility

Choose where applications, data and AI operate

On Premises

Deploy Convertigo directly in your own infrastructure and retain operational control over applications, data, identity and network integration.

Sovereign managed cloud

Use a managed SaaS deployment hosted in France on sovereign infrastructure such as OVHcloud or 3DS OUTSCALE.

Your cloud choice

Deploy on the cloud environment selected by your organization, without tying the application architecture to one hyperscaler.

Open-source foundation

Reduce dependence on a single proprietary language and development environment while preserving the option to inspect, extend and self-host the platform.

A technology vendor, not a services company

Keep ownership of delivery and partner choice

Convertigo is the French software vendor behind the platform. Modernization can be delivered by your internal teams or by the integrator you choose.

Institutional integrators

Convertigo is implemented within projects involving major integration organizations such as CGI and Atos.

Specialist partners

Specialized integrators such as GutiLabs and Warren Walter can support targeted delivery and modernization projects.

Frequently asked questions

Questions IT leaders ask first

Do we need to replace our existing SQL databases?

Not necessarily. Convertigo can access the same supported external SQL databases used by existing applications, allowing the modernization layer to evolve independently from the data migration.

Must the whole application estate be rewritten at once?

No. The recommended approach starts with one bounded pilot, keeps current applications operational and expands only after technical and business validation.

Is Convertigo a software vendor or a services company?

Convertigo is a French technology vendor. Your teams or selected integrators implement the platform, so the delivery model remains under your control.

Are developers licensed individually?

No. Convertigo’s current pricing states that the number of professional and citizen developers is unlimited. Paid editions are based on internal users or real external application usage.

Can Convertigo remain entirely inside our infrastructure?

Yes. The platform and applications can be deployed On Premises. Managed sovereign SaaS and customer-selected cloud deployment are also available.

What is the safest first step?

Select one useful but contained application, connect it to an existing data source, regenerate a limited functional scope and compare delivery speed, maintainability and operating economics.

Verification sources

Review the primary material

Due diligence: commercial terms can change. Validate the applicable PC SOFT order form and the target Convertigo architecture before making a financial decision.

Start with evidence, not a big-bang commitment

Assess one application and define a realistic transition path

In a focused technical session, map the database, interfaces, priority screens, AI opportunities, deployment constraints and coexistence strategy for a first pilot.

Book a 20-minute technical discussion