Custom software development

Software for workflows that no off-the-shelf tool can handle.

You hold your process together with Excel, three tools and Zapier. We build the one web app that maps it instead of bending it. You know the price after 21 days, over 200 projects from Leipzig.

Louis Nell, Managing Director of KNGURU
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  • Kita-App: Anwesenheit und Dienstplan
  • Ridesharing-App mit Sitzplatzwahl
  • Buchungs-App für Räume

The proof you can look up

German Web Award '23, 5.0 stars on Google and #1 among app agencies on OMR Reviews. We win awards on the side. The software still has to work on Monday.

  • OMR Reviews Proud Partner 2026: UX Agencies
  • OMR Reviews Proud Partner 2026: App Development Agencies
  • German Stevie Awards 2026: Gold for PetPlanner

Standard software ends where your process begins.

Custom software isn't for everyone. It pays off when the way you work is the thing you are good at and every standard tool makes you work around it.

  1. 01

    Your process is your advantage

    If your workflow beats the competition, your software should carry it. Right now it probably squeezes it into someone else's template.

  2. 02

    Standard tools force workarounds

    Three tools, two Excel sheets and a Zapier in between. It works until the one person who understands the setup quits.

  3. 03

    Own it instead of renting

    License costs grow with every new hire. Software you own does not. The code, the data and the decision to change it stay with you.

Four steps to a working version

Price and scope are on the table after every step, not at the end.

  1. Prototype

    21 days

    We go through your process and build a clickable prototype your team clicks through before any code is written. From €5,490, fully credited to the build.

  2. Fixed price for the build

    after the prototype

    What breaks in the prototype costs nothing later. What works gets a fixed price, from €15,000.

  3. Development in sprints

    3 to 6 months

    React, Next.js, React Native and Node.js. Every two weeks you get a demo with working features instead of a status report.

  4. Launch, support and further development

    ongoing

    We take it live, keep it secure and up to date and add new features, from €1,990 a month. The code has been yours since day one.

What custom software development costs

Having software built with us means: the prototype comes first, then a fixed price for the build, then support and further development by the month. You don't have to wait for a proposal to learn any of this.

  1. in 21 days

    Prototype

    You click through your software before any code is written. Then the fixed price for the build stands. The prototype is fully credited to the build.

    Price
    from €5,490
  2. Fixed price

    Development at a fixed price

    We build at the price set after the prototype, in fixed stages. Code and accounts belong to you.

    Price
    from €15,000
  3. per month

    Support & further development

    We keep your software secure and up to date, fix bugs and add new features.

    Price
    from €1,990

Want your software not just built, but used? We help from €3,990 a month. That is how our own app DeepDays reached 60,000 users.

Check out our work

A Gold Stevie Award, 200,000 festival visitors, 4.4 stars on Google Play. Eight of over 200 projects, all live, every screen real. Two more we can name but not show.

See all projects

Agency, in-house developer or freelancer

We are not always the right choice. If software is your core business, you need your own team in-house. Then we build the start and hand over.

  1. In-house developer

    Who works on it
    One person, design and concept come on top
    Until the start
    Hiring takes months, then onboarding
    Cost
    Salary runs from the first month, with or without work
    If someone drops out
    If the developer quits, the knowledge leaves too
    Ownership
    Yours
    After the launch
    Fully booked or underused
  2. Freelancer

    Who works on it
    One trade, you coordinate the rest
    Until the start
    Fast, if someone is free right now
    Cost
    Hourly rate, open-ended
    If someone drops out
    The project stalls until a replacement is up to speed
    Ownership
    Usually yes, docs rarely
    After the launch
    Renegotiate
  3. Who works on it
    Concept, UX/UI design, development and project management from one team
    Until the start
    Prototype in 21 days, then the fixed price stands
    Cost
    Prototype from €5,490, then a fixed price from €15,000
    If someone drops out
    The team covers it, the knowledge lives in the repository and the docs
    Ownership
    Code, design and accounts are in your name
    After the launch
    Support and further development from €1,990 a month

Many clients add their own developer after the launch. They take over a clean repository and documentation, not a puzzle.

What you get in writing

Four commitments that live in the contract, not only on this page.

  1. 01

    The agreed price is the final price

    After the prototype the price is fixed. Change requests get a number before we start them, never after.

  2. 02

    Code, design and accounts belong to you

    Repository, Figma files, Webflow and hosting run under your name. You can walk away with all of it.

  3. 03

    We'll also tell you what you don't need

    If the prototype shows the software isn't worth building, we say so. The result is yours either way.

  4. 04

    A reply within one business day

    Management reads every inquiry personally. You get an answer, not a ticket number.

Frequently asked questions about custom software development

The questions managing directors ask us in the first call.

What does custom software development cost?

It depends on the scope, which is why every project starts with a prototype from €5,490. After that the fixed price for the build stands, from €15,000. Support and further development after the launch start at €1,990 a month.

How long does it take?

The prototype is ready after 21 days. A first production version follows after three to six months, depending on scope. Every two weeks you see a demo with features that actually run.

Who owns the code?

You do. Source code, documentation and every access credential are handed over. You can continue with another team whenever you want, even if we hope you won't.

Which technologies do you use?

Web apps and platforms with React and Next.js, mobile apps with React Native, backends with Node.js and PostgreSQL. Where it earns its place, we add AI: assistants, or analysis that runs on its own.

What happens after launch?

If you want, we run and monitor the software, keep it up to date and add new features, from €1,990 a month.

Book your free call.

We look at your plans with you as if they were our own. If the build isn't worth it, we'll tell you, even if that means no project.

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