Let me tell you...

Who NettoWise is

Hi, I'm Swen van Zanten, and in January 2025 I started building NettoWise because I was using Excel alongside my accounting package myself. But I felt it should be done differently. As a software developer, I also knew it could be better. So I started building.

KVK number

88146243

Okay, let's

Start at the beginning

I have been a software developer for more than 20 years and since 2023 I have been working as a freelancer for clients, building software for them. I specialize in creating scalable and efficient software solutions for businesses of all sizes. From backend systems to mobile applications, I deliver high-quality code and innovative features tailored to what is needed.

More than 20 years of experience

Built software that has to hold up over time and make sense in real usage.

Independent since 2023

Working daily on the kind of questions entrepreneurs and clients actually run into.

Technical, but clear

Not just loose features, but systems that feel logical and produce understandable insight.

Back to...

2025, and the start of NettoWise

I started NettoWise_ in 2025 because as a freelancer I noticed that hardly anyone really knows what they actually keep net. Many entrepreneurs mainly look at revenue or profit, but forget about taxes, reserves, pension, and other costs. Because of that, you often only find out how things really stand when the tax assessment arrives.

I wanted to build a solution for that. A tool that helps freelancers understand their real net income and see each month what they can pay out without running into surprises later. That is how NettoWise came to life: a simple way to get a grip on your money as an entrepreneur.

From spreadsheet to product

It started with manual calculations, checking figures, and aligning Excel with bookkeeping data.

Built from real frustration

NettoWise exists because existing tools did not answer the basic question of what you can actually pay yourself safely.

Designed for calm and clarity

The goal is not more data, but less doubt around taxes, reserves, and take-home income.

And Wise?

Who is Wise?

Wise started in a very simple way.

When NettoWise started to take shape, I wanted something that gave the product a face. Something that felt friendly while still matching the idea of insight, overview, and smart financial choices. That is how Wise the owl came to life.

The idea is that Wise is a quiet helper inside NettoWise. A mascot you can meet in different situations, always working toward the same goal: bringing order to the chaos of numbers and helping entrepreneurs understand what they truly keep.

Curious

Wise looks beyond just revenue or profit and focuses on what remains at the end of the line.

Clear

The mascot reinforces the idea that good insight does not have to feel cold or complex.

Approachable

Financial software can be warm, human, and a little playful while staying serious about the numbers.

Wise investigates

Understanding what is really going on

Wise goes into the details, spots patterns, and helps turn complex financial information into something understandable.

Wise the owl working on NettoWise in the lab

Wise builds

Turning raw data into useful insight

Behind NettoWise there is constant experimenting, testing, and refining so calculations keep feeling logical.

Wise the owl among books and administration

Wise explains

Calm instead of clutter

Wise also stands for clear explanations, less jargon, and a product that does not drown you in tables.

Follow along

Short videos and updates from NettoWise

On Instagram, Shorts, and TikTok I share short videos about NettoWise, useful insights for freelancers, and build-in-public updates.

Instagram Reels

The main place for short NettoWise videos and fresh clips.

YouTube Shorts

Short explainers and product fragments in a YouTube-friendly format.

TikTok

Quick updates, concise context, and relatable entrepreneur moments.

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