Chicago might be famous for its deep-dish pizza and skyline, but it’s quietly building a strong tech scene too - especially when it comes to web development. If you’re hunting for teams that really know Umbraco, the city has agencies that mix solid technical chops with an eye for smart, practical solutions. From crafting sleek websites to handling complex custom systems, these developers are all about making content management feel a little less like a headache and a lot more like a tool that actually works for your business.

1. OSKI Solutions

We work with businesses in Chicago and beyond to modernize their web and software systems using Umbraco as a core part of our approach. Our team focuses on building solutions that scale well and integrate with the tools companies already use. We spend a lot of time making sure content management, backend systems, and front-end experiences connect smoothly, without overcomplicating things. Over the years, we’ve found that combining flexible project management with clear communication helps teams feel confident that projects are on track and adaptable as needs change.

Our projects cover a range of industries, from e-commerce and healthcare to FinTech and logistics. We tackle both full-cycle development and dedicated team setups, depending on what fits a client best. Alongside Umbraco, we work with .NET, Node.js, React, and cloud platforms like AWS and Azure to deliver solutions that can grow with the business. It’s not about flashy features; it’s about practical, maintainable systems that make everyday operations smoother and more efficient.

Key Highlights:

• Full-cycle custom software and web development
• Experience in e-commerce, healthcare, FinTech, EdTech, logistics, and more
• Flexible, remote-friendly team workstyle
• Expertise in Umbraco CMS, .NET, Node.js, and React
• Focus on operational efficiency and system modernization

Services:

• Umbraco-based web development
• Custom software and web applications
• Dedicated development teams / IT outsourcing
• Cloud solutions on AWS and Azure
• API integrations and system modernization
• AI-driven solutions using C# and Python

Contact and Social Media Information:

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

2. Marcel Digital

Marcel Digital works with clients in Chicago and beyond, focusing on building websites and custom web applications using Umbraco. They handle a variety of projects, from straightforward websites to more complex, custom web applications. Their team emphasizes smooth front-end user experiences and streamlined content management, making it easier for clients to maintain and update their digital platforms. Collaboration with clients appears to be a key part of their approach, with integrated teams working closely to ensure workflows and tools are connected effectively.

Beyond web development, they integrate digital marketing and analytics into their work. By linking development projects with measurable outcomes, they aim to create systems that are both functional and data-informed. Their work covers multiple sectors and includes ongoing support and maintenance, which allows clients to keep evolving their digital platforms over time without significant friction.

Key Highlights:

• Full-cycle Umbraco website and custom application development
• Integration of front-end user experience with back-end content management
• Data-driven approach linking development to measurable outcomes
• Support and maintenance services for ongoing platform evolution
• Collaborative team structure emphasizing workflow integration

Services:

• Umbraco CMS development and maintenance
• Custom web application development
• Front-end and back-end integration
• Digital marketing strategy and analytics support
• Website optimization and user experience improvements

Contact Information:

• Website: www.marceldigital.com
• Facebook: www.facebook.com/marceldigital
• Twitter: x.com/marceldigital
• LinkedIn: www.linkedin.com/company/marcel-digital
• Instagram: www.instagram.com/officialmarceldigital
• Address: 445 W Erie St, Suite 200 Chicago, IL 60654 USA
• Phone: +1 (872) 324-3760

3. ADHDEV

ADHDEV works with clients in Chicago and internationally to deliver Umbraco-based web solutions. They handle projects ranging from new website builds and intranet systems to e-commerce integrations and custom web applications. Their approach combines front-end and back-end development, allowing them to create user-friendly websites that connect smoothly with other systems, like CRM platforms or external digital tools. The team also supports agencies as subcontractors, providing flexibility in how clients access their expertise.

They focus on maintaining and upgrading existing sites, handling migrations, and performing health checks to ensure systems stay secure and efficient. Beyond development, they offer consulting and UX/UI audits to help clients understand how to improve workflows and optimize digital products. Their services include ongoing support, maintenance, and training, making it easier for organizations to keep their content and applications running smoothly over time.

Key Highlights:

• Silver Umbraco Partner with enterprise-level experience
• Full-cycle Umbraco website and web application development
• Expertise in .NET-based development for complex platforms
• Integration with external tools, CRM, and e-commerce solutions
• Support, maintenance, and consulting services

Services:

• Umbraco CMS development and module creation
• Website migration, upgrade, and re-platforming
• Web and mobile application development
• System integrations with third-party platforms
• UX/UI audits and health checks
• Ongoing support and maintenance

Contact Information:

• Website: adhdev.co
• E-mail: office@adhdev.co
• Facebook: www.facebook.com/adhdev.agency
• LinkedIn: www.linkedin.com/company/adhdev
• Instagram: www.instagram.com/adhdev_agency
• Address: Lobi Space 1655 S Blue Island Ave Chicago, IL 60608
• Phone: +48 608 099 023

4. Concetto Labs

Concetto Labs works with clients both in Chicago and around the world, helping them build solid Umbraco-based CMS solutions. They handle all sorts of projects - from interactive websites and mobile apps to custom e-commerce platforms. They also help connect these systems with other business tools through API development and data integration, so everything plays nicely together. The team likes to keep things flexible, making sure each CMS fits the client’s needs without getting unnecessarily complicated.

Beyond building new platforms, they’re also there for the long haul. Concetto Labs helps with migrations, upgrades, and ongoing maintenance, keeping sites secure and up to date. They’ll even do UX/UI audits and offer consulting, making sure that systems don’t just work - they actually make life easier for the people using them.

Key Highlights:

• Silver Umbraco Partner with multi-industry experience
• Expertise in scalable CMS solutions and custom module development
• Support for data integration and API connectivity
• Migration, upgrade, and ongoing maintenance services
• UX/UI audits and consulting for platform optimization

Services:

• Umbraco CMS design and development
• Mobile app development integrated with Umbraco
• Migration, upgrade, and re-platforming
• API development and system integrations
• Support and maintenance
• UX/UI audits and consulting

Contact Information:

• Website: www.concettolabs.com
• E-mail: info@concettolabs.com
• Facebook: www.facebook.com/concettolabs
• Twitter: x.com/concettolabs
• LinkedIn: www.in.linkedin.com/company/concetto-labs-private-limited
• Instagram: www.instagram.com/concettolabs
• Address: 7289 W Harrison Street Chicago, IL 60612
• Phone: +1 (903) 200 8801

5. Diagram

Diagram is a digital agency with deep expertise in Umbraco development and long-standing ties to the platform’s community. Their work centers on designing and supporting Umbraco-based websites that are secure, scalable, and easy to manage. With a team of certified developers and Umbraco MVPs, they focus on aligning each project with clients’ goals, ensuring the platform is configured to support both current needs and future growth. Their experience spans multiple industries, from finance to education and healthcare, often involving complex integrations and large-scale migrations.

The agency also provides strategy and planning for organizations moving to Umbraco or upgrading existing sites. They place emphasis on creating practical solutions—balancing technical capability with usability. Through their work as a Platinum Contributing Partner, they continue to collaborate with the global Umbraco community while maintaining a focus on reliable development practices and transparent support processes.

Key Highlights:

• Platinum Contributing Partner of Umbraco
• Team includes Umbraco Certified Masters and MVPs
• Experience with enterprise-level website migrations and redesigns
• Focus on scalability, usability, and long-term support
• Works with clients across multiple sectors, including finance, manufacturing, and non-profits

Services:

• Umbraco website design and development
• CMS migration strategy and implementation
• Umbraco upgrades, maintenance, and support
• Umbraco Cloud setup and management
• Headless CMS solutions with Umbraco Heartcore
• Content personalization with Umbraco Engage

Contact Information:

• Website: www.wearediagram.com
• Facebook: www.facebook.com/wearediagram
• Twitter: x.com/wearediagram
• LinkedIn: www.linkedin.com/company/wearediagram
• Instagram: www.instagram.com/heydiagram
• Address: 55 S. Main St. Suite 230 Naperville, IL 60540
• Phone: 630-375-6833

Conclusion

When it comes to finding the right Umbraco development partner in Chicago, there’s a lot to consider. Each of the agencies highlighted here brings a slightly different mix of expertise, focus, and workflow style. Some lean heavily on complex custom development, while others pair their CMS skills with design or integration support. What they all share, though, is the ability to help organizations build, maintain, and evolve their digital platforms with flexibility and efficiency.

Choosing the right team often comes down to how well they fit with your specific needs and how you prefer to work. Whether you’re updating a legacy site, building something from scratch, or integrating your CMS with other business tools, Chicago has options that can meet a variety of project types and sizes. At the end of the day, knowing what each agency offers - and how they operate - makes it easier to find a partner who can help your business move forward without unnecessary friction.