// k:ey software

We build software
that lasts.

key software builds custom web, mobile and desktop applications from Germany. From architecture to deployment.

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Services

What we build

Custom solutions for web, mobile, desktop and IT — carefully built, maintainable long-term, from one source.

Websites & Web Apps

Websites and web apps that load fast, get found and grow with your business — from company websites to SaaS platforms.

AstroNext.jsVue.jsAngularTypeScriptTailwind CSSBootstrap

Desktop Applications

Desktop applications based on .NET and Avalonia — offline-capable, close to the system and publishable for Windows, macOS and Linux.

.NETAvalonia.NET MAUIWPFWinUIUno PlatformWindowsmacOSLinux

Shopware

Shopware plugins and themes — custom-built, cleanly integrated and backed by shop setup, maintenance and ongoing support.

Shopware 6Shopware 5PluginsThemesShop setupHostingMaintenance

IT Infrastructure

We host client projects on our own servers in German data centres — GDPR-compliant, with self-hosted source control and professional development standards.

Servers DEDockerHetznerCloudAWSMicrosoft AzureGoogle CloudCI/CDGDPRTesting

AI IntegrationAI

We integrate existing AI services purposefully into applications — where it delivers real value, not because it is trending.

MistralOpenAIClaudeAPI IntegrationMCP

Ecosystem

More than services

Alongside client projects, we build our own products and brands — a growing ecosystem of software, tools and platforms.

Plugins & Themes

Shopware Extensions

Professional extensions and design themes for Shopware 6, developed and published in the official store.

View Shopware products

Client Projects

Selected Projects

Custom solutions for clients — from web applications and mobile apps to IT infrastructure.

View projects

How we work

From idea to release

No linear waterfall — software is built iteratively. Every release is the start of the next cycle.

  1. 1

    Idea

    Understand requirements, clarify goals

  2. 2

    Planning

    Architecture, tech stack, roadmap

  3. 3

    Development

    Iterative, transparent, tested

  4. 4

    Testing

    Unit, integration and E2E tests

  5. 5

    Release

    Deployment on own infrastructure

  6. ↩

    Next cycle

Start a project

// clients

Trusted by 30+ clients.

Over 30 projects from Solingen — web, mobile and desktop, Made in Germany, hosted in German data centres.

More about us →

// shape your project

Put your project together.

Three short steps, then we get back to you. No sign-up, no pressure — you just sketch the direction.

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What would you like to build?

Pick what fits best — details come later.· Single selection

Would you like to get in touch right away?

Go to contact page