WCF still gets the job done for a lot of businesses, when it comes to building solid communication systems. Whether you're dealing with service-oriented architectures or just need to integrate a bunch of legacy systems, WCF offers the kind of flexibility and structure that makes sense in enterprise settings. In the US, there’s still a steady demand for teams who know how to work with it, especially when reliability and interoperability are non-negotiable.

In this article, we’ll take a closer look at WCF development in the USA-why it’s still relevant, who’s using it, and which companies are offering serious expertise in this space. If you’re weighing whether to update, maintain, or build on top of WCF, this guide should help you get a clearer picture.

1. OSKI Solutions

At OSKI Solutions we include WCF development as part of our work with .NET-based systems, especially when projects call for solid backend communication across distributed services. Our USA team has been working with the Microsoft stack for over a decade, so we know where WCF fits and when it makes sense to use it. In many of our integration projects or enterprise SaaS tools, we build WCF service layers to handle secure, structured interaction between APIs, apps, and cloud systems. Even though WCF isn't new tech, it's still the right call in certain environments, especially for legacy systems or when SOAP-based protocols are a requirement.

We usually combine WCF with modern frontend frameworks or CMS platforms like Umbraco, where the frontend experience connects to a more rigid backend through well-defined services. Our developers also handle support, version upgrades, and custom service extensions when the existing WCF setup needs to be scaled or cleaned up. Whether we’re delivering a fully managed system or working through outstaffing models, our approach stays the same: write clean code, plan properly, and make the pieces talk to each other without adding extra complexity.

Key Highlights:

• Provide WCF development within .NET and CMS integration projects
• Focus on service architecture for backend and API communication
• Experience working with legacy and modern enterprise systems
• Use WCF in SaaS platforms, CMS tools, and hybrid cloud setups
• Offer both outsourcing and outstaffing depending on project scope

Services:

• WCF Service Design and Implementation
• Custom .NET Integration Layers
• WCF Support and Maintenance
• Umbraco CMS and API Integration
• Progressive Web App Development
• Frontend Development with React, Angular, and Vue
• Cloud Solutions with Azure, AWS, and Hybrid Models
• DevOps and CI/CD Setup
• Custom CRM and Finance Software
• AI and Machine Learning System Integration

Contact Information:

• Website: oski.site  
• E-mail: contact@oski.site 
• LinkedIn: www.linkedin.com/company/oski-solutions 
• Address: Estonia, Tallinn, Kaupmehe tn 7-120, 10114
• Phone: +48571282759

2. Vofox Solutions

Vofox Solutions provides WCF development as part of a broader lineup of enterprise software services available to clients in the USA. They support projects that require system integration, custom service layers, or legacy .NET systems that still rely on WCF-based architecture. Their development team uses WCF to help businesses streamline communication between distributed systems, with attention to performance, contract-based service interaction, and configuration flexibility. This is often part of a larger ecosystem involving .NET, Azure, or enterprise web applications.

Beyond WCF, they maintain a wide tech stack covering both frontend and backend, cloud platforms, mobile frameworks, and CMS tools. Their approach to development appears modular, offering different hiring models depending on whether the client needs a single developer or a long-term offshore team. This includes support roles like QA engineers, DevOps specialists, UI/UX designers, and system architects. WCF development is typically positioned for enterprise clients who already have existing .NET infrastructure and need structured service interaction between components.

Key Highlights:

• Offers WCF development within a broader .NET and enterprise software offering
• Supports clients in the USA through offshore delivery and flexible hiring models
• Experienced with distributed systems and multi-layered architecture
• Integrates WCF into full-stack builds when required for system compatibility
• Also handles ongoing maintenance and updates for legacy WCF systems

Services:

• WCF Development Services
• ASP.NET / MVC Development
• C# / WPF Development
• Windows Azure Development
• Custom Software Development
• Software QA & Testing Services
• Software Maintenance & Support
• Cloud integration using AWS and Azure
• Database Management and IT Consulting
• Frontend and Mobile App Development (Angular, React, Xamarin, etc.)

Contact Information:

• Website: vofoxsolutions.com
• E-mail: info@vofoxsolutions.com
• Facebook: www.facebook.com/vofox
• Twitter: x.com/VofoxS
• LinkedIn: www.linkedin.com/company/vofox-solutions-pvt-ltd
• Address: Vofox Solutions Inc 2121 Airport Freeway, Suite 390, Irving, Texas 75062
• Phone: (856) 631-6069

3. Zealous System

Zealous System delivers WCF development as part of their broader desktop and enterprise software capabilities. They focus on integrating WCF into existing systems to streamline service communication, especially in use cases where consistent interaction between distributed applications is critical. Their team handles both standalone WCF builds and integration layers within larger solutions that may also involve WPF, custom desktop apps, or enterprise backend services. The WCF work typically fits into projects requiring internal tools, secure service connections, or legacy interoperability.

They also provide WPF development alongside WCF, which shows up in many of their offerings in healthcare, logistics, mining, and defense. Services span modernization of older WPF systems, custom UI builds, and long-term maintenance. For WCF, they emphasize clean architecture, reliable messaging patterns, and simplified communication between internal platforms. Their overall development model is structured around dedicated teams, Agile planning, and domain-specific consultants who help translate business needs into tech-driven solutions without overcomplicating the process.

Key Highlights:

• Offers WCF development for service communication and integration
• Combines WCF with WPF and desktop app development where needed
• Focuses on industry-specific use cases across healthcare, logistics, and more
• Supports modernization, integration, and long-term maintenance of .NET-based systems
• Uses Agile workflows with defined scope planning and sprint execution

Services:

• WCF Integration and Custom Services
• WPF Development and Modernization
• Silverlight App Development
• Desktop Application Migration
• Maintenance and Support for Legacy Systems
• Custom UI/UX for Desktop Interfaces
• Backend Services Using .NET Framework
• Enterprise Software Solutions for Specific Domains
• Software Testing and QA
• Dedicated Development Teams with Flexible Hiring Models

Contact Information:

• Website: www.zealousys.com
• E-mail: info@zealousys.com
• Facebook: www.facebook.com/ZealousSystemPvtLtd
• Twitter: x.com/zealousys
• LinkedIn: www.linkedin.com/company/zealous-system-pvt-ltd-
• Instagram: www.instagram.com/zealous_system_official
• Phone: +1(614) 348-7475

4. Zenkins Technologies

Zenkins Technologies provides .NET WCF development services as part of their broader enterprise software offering, focusing on secure and scalable communication between distributed systems. Their approach to WCF is grounded in practical use cases where integration across platforms, services, or legacy tools needs to happen without reengineering everything from scratch. They design custom WCF services, optimize existing ones, and handle full lifecycle delivery from consultation to long-term support. Their WCF capabilities are integrated into broader business solutions, especially in industries like finance, logistics, and healthcare, where system interoperability matters.

They also work with clients on migration projects, helping move outdated or fragmented setups into more maintainable and standardized WCF service layers. Their process includes initial assessment, system design, development, testing, and post-launch support, all while keeping the architecture aligned with specific business objectives. Outside WCF, Zenkins operates across cloud, AI, DevOps, and enterprise software domains, which allows them to connect WCF into more complex systems when needed. Their team builds around practical goals, focusing more on clean implementation than tech trends.

Key Highlights:

• Develops and integrates custom WCF services for enterprise systems
• Focuses on secure, scalable service communication across platforms
• Offers WCF migration and optimization for legacy systems
• Provides structured delivery from architecture design to support
• Active in industries like logistics, healthcare, and financial services

Services:

• Custom .NET WCF Service Development
• WCF Integration into Existing Applications
• WCF Optimization and Performance Tuning
• Legacy System Migration to .NET WCF
• Secure WCF Implementation with Authentication and Encryption
• Technical Consulting for Service-Oriented Architecture
• Ongoing Maintenance and Support for WCF Applications
• Enterprise Software Development
• API Development and Integration
• Cloud and DevOps Enablement with CI/CD Integration

Contact Information:

• Website: zenkins.com
• E-mail: contact@zenkins.com
• Facebook: www.facebook.com/zenkinstech
• Twitter: x.com/zenkinstech
• LinkedIn: www.linkedin.com/company/zenkins
• Instagram: www.instagram.com/zenkinstech
• Address: 430 Park Ave, New York, NY 10022, United States
• Phone:  +91 70690 18504

5. OM Software

OM Software includes WCF development as part of its .NET-focused services, working with clients who need service-oriented architecture and secure web communication built into their systems. Their developers use WCF when the project involves cross-platform messaging or integration across distributed environments. This typically fits into enterprise applications or backend systems that need structured service layers, reliable messaging, or SOAP-based APIs. They also work with WPF for UI projects, often pairing the two in scenarios where a rich user interface needs to communicate with backend services.

Their WCF work covers both new development and support for existing systems. They take on customized service design, messaging frameworks, and secured service setup, along with maintenance and SOA-based integration. The team also works on combining WCF with WPF in browser-based applications, especially where real-time interaction and strong data binding are required. Their development model appears to focus on practicality and maintaining flexibility for evolving project scopes, with an emphasis on keeping things cost-effective and scalable.

Key Highlights:

• Uses WCF for enterprise service communication and SOA projects
• Offers combined WPF/WCF development for UI and backend solutions
• Handles WCF integration, messaging, and secured service builds
• Supports maintenance and updates for legacy WCF apps
• Works across industries including finance, healthcare, and logistics

Services:

• Custom WCF Implementation
• WCF Integration and Messaging System
• WCF and SOA Architecture Development
• Secure Web Development with WCF
• WCF App Support and Maintenance
• WPF Frontend Development and UI Design
• WPF Data Binding and Graphics Integration
• Dedicated WCF/WPF Developer Hiring
• .NET-Based Web Application Development
• IT Consulting and Project-Based Delivery

Contact Information:

• Website: www.omsoftware.net
• E-mail: info@omsoftware.net
• Facebook: www.facebook.com/omscorps
• Twitter: x.com/omsoftware
• LinkedIn: www.linkedin.com/company/omsoftware
• Address: 992 S. 4th Street,100-258 Brighton, CO, 80601 United States of America
• Phone: +1 (303) 872 8133

6. C-Metric Solutions

C-Metric offers WCF development as part of their larger suite of enterprise .NET services, with a focus on building service-oriented architecture and cross-platform communication layers. They typically apply WCF in situations where different systems or modules need to exchange data securely and reliably, whether it’s between internal applications or across client-facing services. WCF support is integrated into several of their offerings, including their work with CMS platforms like Umbraco, where WCF acts as a communication bridge for APIs and third-party integrations.

Their team provides both custom WCF builds and ongoing support, along with migration from older service frameworks. Projects tend to follow a structured lifecycle from assessment through testing and support, keeping the implementation aligned with business requirements. They also work on maintaining security and performance, often using WCF alongside Azure, REST APIs, and standard .NET tools. While WCF isn’t the flashiest tech anymore, C-Metric treats it as a practical piece of the puzzle in enterprise environments that still need structured service interaction without overengineering the stack.

Key Highlights:

• Uses WCF in enterprise service integration and Umbraco-based projects
• Delivers secure, scalable WCF services for multi-system communication
• Offers migration and support for legacy service-oriented setups
• Integrates WCF into full-stack solutions across .NET and Azure platforms
• Focused on reliability, security, and performance tuning

Services:

• Custom WCF Development
• Service-Oriented Architecture Design
• WCF Integration with Umbraco and CMS Platforms
• API and Messaging System Implementation
• WCF Support and Maintenance
• Migration from Legacy Services to WCF
• Web and Mobile App Development
• Azure and Cloud Application Integration
• Full Lifecycle .NET Development
• Technical Consulting and Architecture Planning

Contact Information:

• Website: www.c-metric.com
• E-mail: info@c-metric.com
• Facebook: www.facebook.com/CMetricSolution
• Twitter: x.com/CMetricSolution
• LinkedIn: www.linkedin.com/company/cmetricsolution
• Instagram: www.instagram.com/CMetricSolution
• Address: 1221 North Church Street, Suite 202 Moorestown, NJ 08057
• Phone:+1 (856) 482-7700

Conclusion

WCF might not grab headlines anymore, but in a lot of business-critical systems, it’s still doing a quiet, dependable job. Whether it’s holding together legacy .NET infrastructure or keeping services talking across platforms, WCF development is far from irrelevant. In the US, there’s a mix of companies that continue to use WCF not out of habit, but because it still solves the right problems in the right contexts. You’ll find teams maintaining and modernizing it, integrating it with newer tech, or simply building around it with clarity and purpose.

What matters now isn’t whether WCF is shiny or new, but whether it fits into a system that needs reliability, structured service contracts, and secure communication. And for many organizations, it still checks all those boxes. So if you’re working with it, or thinking about it for the first time in a while, it’s worth finding a team that treats WCF as a tool-not a relic. Because when it’s used well, it still does the job just fine.