15 Best .NET Web Development Companies in Europe (2026)

Gilzor develops custom web applications for startups, small and medium-sized businesses, and product companies. Its web development work covers planning, architecture, front-end and back-end engineering, testing, deployment, and continued development after release.

.NET web development is part of the company's broader custom software offering, so projects can extend beyond a standalone backend build into UI/UX, integrations, QA, and product support. This setup can make sense for businesses that want one team involved throughout the product lifecycle rather than separate vendors handling each stage.

UKAD has a particularly clear focus on Microsoft-based web development. The company works with .NET, ASP.NET Core, Azure, Umbraco, Optimizely, React, and related technologies across custom web applications, SaaS platforms, ecommerce systems, and content-heavy websites.

Published projects include legacy SaaS modernization with .NET and Umbraco, multi-market ecommerce systems using .NET microservices, and long-running Azure-hosted platforms. UKAD can provide complete project delivery or dedicated development teams, which gives clients some flexibility when adding .NET expertise to an existing engineering operation.

A-listware provides .NET engineering within a wider custom software development and outsourcing practice. Its web work includes applications, portals, ecommerce systems, integrations, and modernization projects, supported by UX/UI, QA, infrastructure, and application management services.

The company's backend capabilities include .NET alongside Java, Python, PHP, Node.js, and Go, while front-end teams work with frameworks such as React, Angular, Vue, and Next.js. This breadth is useful for businesses whose .NET application has to coexist with several other technologies or existing enterprise systems.

N-iX maintains a sizeable .NET engineering practice covering web, enterprise, cloud, desktop, and cross-platform software. Its web capabilities include ASP.NET Core, ASP.NET MVC, Web API, Blazor, SignalR, and related technologies used for customer-facing products and large internal systems.

The company also handles modernization and migration work, including projects that move older applications toward newer .NET architectures and cloud infrastructure. With engineering locations across Europe, N-iX is suited to organizations that need the ability to build or expand a relatively large .NET team.

OSKI Solutions develops web and business applications using C#, .NET, Azure, and complementary front-end technologies. Its .NET work includes new application development as well as modernization, integration, maintenance, and continued development of existing products.

The company's wider web capabilities cover APIs, portals, SaaS platforms, cloud infrastructure, Umbraco, React, Next.js, Vue.js, and Angular. That range is useful for projects where .NET forms the core application layer but needs to connect with modern interfaces, content systems, or cloud services.

Andersen has a dedicated .NET practice covering custom applications, web systems, integrations, migration, and consulting. Its technical stack includes ASP.NET, Blazor, and other parts of the Microsoft ecosystem, with .NET used across sectors such as financial services, healthcare, and ecommerce.

The company has a substantial pool of .NET engineers and supports both complete software projects and team augmentation. European development and representative offices include Warsaw, Krakow, Munich, and London, giving the company a broad regional footprint.

SoftPro is a Warsaw-based development company with a strong Microsoft technology focus. Its web applications use technologies including ASP.NET, .NET Core, Azure, React, Vue.js, and Node.js, allowing the team to cover both the Microsoft backend and modern browser interfaces.

Its work extends beyond greenfield development into modernization and long-term software support. Published capabilities include SaaS applications, CRM systems, business portals, cloud solutions, and integration platforms, which makes the company relevant to organizations building operational rather than purely informational websites.

Itexus develops complex software primarily for financial services organizations, including banks, fintech companies, brokers, and other businesses operating in regulated financial markets. .NET is one of the backend technologies used by its engineering teams for APIs, business logic, microservices, and enterprise systems.

The company is particularly relevant when a .NET web application involves financial workflows, integrations, data processing, or demanding security requirements. Alongside .NET, its broader services cover web development, cloud infrastructure, AI, data engineering, QA, and product development.

SCAND provides dedicated .NET development services covering application architecture, custom software, modernization, integration, and ongoing maintenance. Web development is a defined part of the offering rather than a secondary capability, with teams working on both new applications and established systems.

The company's .NET practice can support enterprise software, APIs, business applications, and web platforms. Dedicated team options are also available for companies that already have an internal technical organization but need additional Microsoft-stack capacity.

net-devs works on enterprise software using .NET alongside other backend stacks such as JVM technologies, Node.js, Python, and Go. For web projects, its backend engineering is combined with React, Angular, Vue, TypeScript, and cloud infrastructure across Azure, AWS, and Google Cloud.

The company also works on technical audits and incremental modernization. This can be useful for organizations with an older .NET system that cannot simply be rewritten from scratch and instead needs architecture improvements, cloud migration, or gradual replacement of individual components.

Leobit places .NET near the center of its software engineering practice. Its developers build web applications with ASP.NET Core and Blazor and also work with Azure, microservices, APIs, desktop software, and cross-platform applications.

The company handles both new product development and existing software modernization. Its European development centers include Lviv, Krakow, Tallinn, and London, while the published portfolio includes more than 100 .NET projects. This makes Leobit particularly relevant to teams looking for a provider with a concentrated Microsoft-stack practice rather than occasional .NET capability.

Mobian Studio develops custom .NET applications as part of its wider software engineering and dedicated-team services. Its capabilities include ASP.NET, .NET Core, Azure, web applications, enterprise systems, backend development, and cloud infrastructure.

Projects can be handled as complete product builds or through team augmentation. The company also provides QA and continued maintenance, so clients can keep the same engineering partner involved as a .NET application moves from initial development into a longer release cycle.

ELEKS develops custom software across .NET, front-end technologies, databases, cloud infrastructure, mobile development, and DevOps. Its active .NET engineering work includes modern C#, .NET, REST APIs, Microsoft SQL Server, Azure services, and front-end frameworks used for web applications.

The company's European delivery footprint and enterprise orientation make it better suited to substantial software products than lightweight website projects. Published projects and current engineering roles show .NET being used for industries including healthcare, insurance, life sciences, and other business-critical systems.

Lengreo offers .NET web development for businesses that need custom applications, integrations, and performance-focused web platforms. Its published .NET offering covers projects built around specific operational requirements rather than standardized website templates.

The company also works with technology businesses through its broader growth and consulting practice. For .NET projects, the relevant scope includes custom application development, connecting applications with existing systems, and improving the performance of web products already in use.

STX Next is better known historically for Python engineering, but its technology coverage now also includes .NET following the integration of Brainhub. The combined organization works across .NET, JavaScript, cloud infrastructure, data, AI, and modern front-end development.

Its .NET capability fits particularly well within broader digital products that combine web applications with cloud services, data processing, or AI functionality. With its headquarters in Poznań and European delivery operations, the company provides another option for businesses that need .NET development within a multidisciplinary engineering environment.