Best Legacy System Modernization Companies in the Netherlands

Modernizing legacy systems demands a careful evaluation of technical expertise, project management capabilities, and understanding of industry-specific requirements. Organizations need to assess how potential partners handle integration challenges, data migration, and system scalability to ensure smooth transitions and long-term flexibility. SoftPro serves buyers across the Netherlands as an international partner specializing in legacy system modernization, providing experienced support that aligns modernization strategies with business objectives.

1. SoftPro

SoftPro is a leading international partner specializing in legacy system modernization, offering tailored software solutions to clients seeking to enhance their digital infrastructure. With a strong presence in the Netherlands, SoftPro delivers comprehensive services that address the unique challenges of modernizing legacy systems, ensuring seamless integration and improved operational efficiency.

Leveraging expertise in .NET, .NET Core, C#, and Azure, SoftPro excels in developing enterprise-level content management systems and facilitating complex migrations. Their proficiency in these technologies enables the creation of scalable and reliable solutions that meet the evolving needs of businesses in the Netherlands.

Key Highlights

• Specializes in .NET, .NET Core, C#, and Azure technologies.
• Expert in enterprise content management systems and complex migrations.
• Offers comprehensive legacy system modernization services.

Services

• Software Development
• Web Application Development
• Cloud Development
• Artificial Intelligence

Contact Information

Website: soft-pro.pl

Phone: +48 571 282 759

Address: Poland, Warsaw, Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401

LinkedIn: www.linkedin.com/in/kyrylo-o

2. AvenDATA

AvenDATA specializes in the secure decommissioning and archiving of legacy IT systems, ensuring compliance with fiscal retention requirements. Their services are tailored to organizations seeking to phase out outdated applications while maintaining access to essential data.

Key Highlights

• Over 1,100 successful archiving projects completed.
• More than 21 years of experience in legacy system decommissioning.
• Team of over 225 specialists with deep expertise in archiving and system decommissioning.
• Hosting infrastructure operates exclusively in highly certified data centers to minimize risks and ensure compliance.

Services

• SAP Decommissioning
• Oracle Decommissioning
• AS/400 Archiving
• Mainframe Archiving

Contact Information

Website: avendata.nl

Phone: +31 20 820 00 00

Address: Herengracht 124, 1015 BT Amsterdam, Netherlands

LinkedIn: https://www.linkedin.com/company/avendata/

3. Bitmash

Bitmash specializes in modernizing legacy applications by upgrading existing software with the latest technologies. They offer a comprehensive service that includes thorough analysis, strategic planning, migration to modern frameworks, and ongoing maintenance to ensure optimal performance.

Key Highlights

• Expertise in migrating legacy applications to modern technologies like, Django, and cloud platforms such as Azure.
• Focus on zero-downtime deployment to ensure uninterrupted business operations during migration.
• Emphasis on enhancing user experience through modern UI/UX design, ensuring applications are intuitive and accessible.
• Provision of proactive maintenance and regular updates to keep systems secure and up-to-date.

Services

• Legacy Application Modernization
• Fullstack Implementation
• SaaS Development
• Process Automation

Contact Information

Website: bitmash.nl

Phone: 085 744 4101

LinkedIn: linkedin.com/company/bitmash

4. SUE

SUE is a cloud-native solutions partner that assists technology-driven organizations in modernizing legacy systems to achieve their business objectives. Their approach integrates expert professional services with secure, in-house developed AI-driven software, aiming to reduce project timelines by at least 50% while minimizing costs, risks, and efforts.

With over 28 years of experience, SUE specializes in bridging the gap between legacy systems and cloud-native solutions. They offer a range of modernization strategies, including rehosting, refactoring, rearchitecting, and rebuilding components of applications, tailored to meet specific business needs.

Key Highlights

• SUE has over 28 years of experience in cloud-native solutions.
• They offer a range of modernization strategies, including rehosting, refactoring, rearchitecting, and rebuilding components of applications.
• SUE's in-house developed AI-driven software, Re:App, accelerates legacy modernization by reducing migration times from months to hours.
• In June 2026, SUE acquired AWS specialist CloudPhilos, strengthening its position as a leading AWS partner in the Netherlands.

Services

• Application Modernization
• Cloud Migration
• Platform Engineering
• Cloud Security

Contact Information

Website: sue.nl

Phone: +31 345 656 666

Email: info@sue.nl

Address: De Ooyen 9, 4191 PB Geldermalsen, Netherlands

LinkedIn: https://www.linkedin.com/company/sue-cloud-native-solutions/

5. Trifork Amsterdam

Trifork Amsterdam specializes in modernizing legacy systems for organizations operating in high-stakes, regulated environments, such as insurers adhering to DORA and teams complying with NIS2 and GDPR. They offer incremental, evidence-ready modernization services that avoid the risks associated with large-scale replatforming.

By leveraging modern technology stacks and automated testing, Trifork Amsterdam accelerates time-to-market for enhancements by up to 50%. Their approach embeds identity, logging, and traceability into systems, ensuring compliance with regulations like DORA, NIS2, and GDPR. This modernization also improves data quality, enabling organizations to harness AI-driven insights and new revenue streams.

Key Highlights

• Achieves up to 50% faster time-to-market for enhancements.
• Ensures 100% audit readiness with OAuth2/OIDC, access, and change traceability.
• Increases capacity to deliver new business features by 60%.
• Utilizes modern technology stacks and automated testing to minimize replatforming risks.

Services

• Modernization Services
• Application Development
• Digital Exam Solutions
• Technology Advisory

Contact Information

Website: trifork.nl

Address: Vlaardingenlaan 15, 1062 HM Amsterdam, Netherlands

LinkedIn: https://nl.linkedin.com/company/trifork-amsterdam

6. This.nl

This.nl specializes in legacy system modernization, focusing on migrating outdated applications without causing downtime. They extract core business logic from legacy systems and translate it into cloud-native architectures, ensuring scalability and compliance. Their approach allows businesses to retain critical processes while integrating with modern tools, thereby reducing the Total Cost of Ownership (TCO). This methodology is particularly beneficial for organizations seeking to modernize without the complexities of full system overhauls.

Key Highlights

• Expertise in migrating legacy systems without causing downtime.
• Focus on extracting and reusing core business logic.
• Specializes in translating legacy applications into cloud-native architectures.
• Proven track record with clients like AkzoNobel, FrieslandCampina, and Deutsche Telekom.

Services

• Legacy Modernization
• Cloud Migration
• Full Stack Development
• DevOps Services

Contact Information

Website: www.this.nl

Phone: +31 85 732 5200

Email: info@this.nl

Address: Reactorweg 47, 3542AD Utrecht, Netherlands

LinkedIn: https://www.linkedin.com/company/this-nl

7. Sisar

Sisar is a Netherlands-based company specializing in enhancing IT landscapes with a focus on modernization and information security. They offer end-to-end application services, covering all stages of the application lifecycle, from development to modernization, management, and maintenance. Their comprehensive modernization platform combines proprietary and third-party tools for an industrialized approach across the application portfolio. Sisar employs a platform-driven approach to cloud migration, ensuring applications are digital-ready while maintaining agility, elastic scalability, and cost-effective modernization.

Key Highlights

• Founded in 2014 in the Netherlands.
• Expanded operations to the UK, UAE, and India.
• Recognized as one of the fastest-growing companies in the Netherlands in 2023 and 2024 by the Financieel Dagblad.
• Offers services in data management, cloud security, and application security.

Services

• Application Services
• Cloud Services
• Software Testing
• Data & Security

Contact Information

Website: www.sisar.nl

Phone: +31 208 005 072

Email: sales@sisar.nl

Address: Burgemeester Haspelslaan, 61, 1181 NB Amstelveen, The Netherlands

LinkedIn: linkedin.com/company/sisar-bv

8. Cloud.nl

Cloud.nl specializes in modernizing legacy systems by providing step-by-step migration strategies that minimize risk and cost. They emphasize gradual stabilization, containerization, and targeted modernization to ensure smooth transitions without overwhelming clients.

With over 20 years of experience and more than 50 legacy migrations, Cloud.nl offers comprehensive management of server environments, including monitoring, updates, security, and performance optimization. Their approach is tailored to meet the unique needs of each client, ensuring a personalized and effective modernization process.

Key Highlights

• Over 20 years of experience in managing server environments.
• Completed more than 50 legacy migrations.
• Provides 24/7 monitoring and support with no helpdesk queues.
• Offers a fully managed service, including monitoring, updates, security, and performance optimization.

Services

• Legacy System Modernization
• Managed Hosting
• Hybrid Cloud Solutions
• Migration Services

Contact Information

Website: cloud.nl

Phone: +31-162-820000

Email: contact@cloud.nl

Address: Hoge Ham 93 b, 5104 JC Dongen, The Netherlands

LinkedIn: linkedin.com/company/cloudnl

9. Thinkwise

Thinkwise is a technology firm specializing in modernizing legacy business applications through its AI-powered, model-driven development platform. By transforming and replacing business-critical systems, Thinkwise enables organizations to innovate without the constraints of outdated software. Their approach focuses on delivering technology and business results that support clients in building a 'never-legacy' enterprise.

Key Highlights

• Over 20 years of experience in modernizing business-critical software.
• Serves over 1,800 companies across various industries, including Transport & Logistics, Manufacturing, Food & Agri, Wholesale and Retail, and not-for-profit organizations.
• Offers a proprietary AI-Upcycler that automatically converts at least 70% of existing application landscapes, preserving unique business logic.
• Recognized by Forrester in its 2023 evaluation, The Forrester Wave™: Low-Code Development Platforms For Professional Developers, for enabling rapid professional development and continuous improvement of large core-record-keeping applications.

Services

• Legacy System Modernization
• AI-Powered Development Platform
• Model-Driven Application Development
• Business Application Transformation

Contact Information

Website: www.thinkwisesoftware.com

Phone: +31 (0) 88 225 8000

Email: info@thinkwisesoftware.com

Address: Ovenbouwershoek 9, 7328 JH Apeldoorn, Netherlands

LinkedIn: linkedin.com/company/thinkwise-software

10. We Enable B.V.

We Enable B.V. is a digital engineering agency specializing in developing and implementing digital innovations across various sectors, including manufacturing, healthcare, and startups. They focus on creating tailored solutions that enhance efficiency and flexibility, often integrating advanced technologies like AI and IoT into existing systems.

Their approach emphasizes precision and predictability, ensuring that projects are delivered with fixed pricing and measurable quality. This methodology is particularly beneficial for legacy system modernization, as it allows for seamless integration of new technologies without disrupting existing operations.

Key Highlights

• Established in 2011, with over a decade of experience in digital innovation.
• Expertise in AI, servitization, and data integration.
• Proven track record in sectors such as manufacturing, healthcare, and startups.
• Utilizes a proprietary 5D process for project execution, ensuring fixed pricing and quality control.

Services

• Digital Engineering
• AI Integration
• IoT Solutions
• Process Automation

Contact Information

Website: www.we-enable.nl

Phone: +31 46 850 08 29

Email: info@we-enable.nl

Address: Pastoor Cramerstraat 2E, 6102 AC, Echt, Netherlands

LinkedIn: https://www.linkedin.com/company/we-enable-b-v/

Conclusion

When choosing a legacy system modernization partner in the Netherlands, consider the specific needs of your organization, such as compliance requirements, risk tolerance, and the desired pace of migration. Companies like SoftPro, featured here for its tailored digital infrastructure solutions, may be suited for clients seeking an international partner with a strong local presence. Others, such as firms specializing in secure decommissioning, cloud-native migration, or AI-powered development platforms, offer distinct approaches that align differently depending on your business context and modernization goals.