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Two founders, and an argument we kept seeing

EverStamp was started by Joeri Westendorp and Arjen Hoek, who kept running into the same moment: a photo that should have settled a disagreement, and did not. This page tells how that became a camera whose photos anyone can check themselves.

Our story

EverStamp grew out of frustration. Returning a hire car on a business trip, we ended up in an argument about damage to the vehicle. We had taken photos carefully, and still the return turned into a real dispute. With a great deal of effort we were proved right, but on the flight home we thought: this has to change. When we brainstormed, we saw many more situations where photos can be a source of argument:

A deposit held back for a mark that was already there. A snag the builder says appeared after the handover. A leak from upstairs that, according to the neighbour, is old. Damage to property where the insurer wants to see evidence. Every time there was a photo, and every time it settled nothing, because the other side had no reason to believe when or where it was taken.

For a long time a photograph was close to an argument-ender. Pictures could always be doctored; what changed is that everyone now knows it. The moment anybody can say “that could be fake”, a real photo loses its weight too, and the person who took it has no way to show otherwise.

The usual answer is a bigger claim: apps that promise ‘tamper-proof’ or ‘court-ready’ photos without naming a standard or explaining a mechanism. We think the answer runs the other way. Say precisely what is established, say precisely what is not, name the standard, and make the whole thing checkable by someone who has never heard of us.

‘When and where a photo was taken is often what the argument is about. With EverStamp the other side can check for themselves what is established, and what is not.’

So we built the opposite of a bigger claim. The app puts the date, time and place into the image, keeps the photos together as one file, and has an independent service timestamp the file when it is closed. Whoever receives it checks it in the browser, and every check but one also runs on ordinary public tooling.

That makes the product smaller than the promises around it, and that is the point: a claim you can check is worth more than one you have to believe.

About the founders

Joeri and Arjen met while studying spatial planning and then went their separate ways, but always stayed friends. Joeri helped build a European software company; Arjen built his career at Microsoft, among others. Real estate brought them back together: in 2024 they started Financieren.nl, which helps property investors finance their real estate. With the idea for EverStamp, they saw where the tool could help in that work too: a valuation, a construction draw or a handover rests on a handful of photos, and nobody can show when those were taken or that nothing has changed since.

Joeri Westendorp

Product & Tech

Joeri has spent more than twenty years in B2B software. As co-owner he started FleetGO from an attic room and grew it into one of Europe’s larger telematics providers, with tens of thousands of vehicles sending data in real time. A successful exit followed in 2022. FleetGO taught him that data is only worth something when someone else can check it: a mileage log has to stand up to the tax authority, a tachograph file to the inspector. He moved into real estate with a master’s degree in the field, and the contrast was hard to miss. Precisely where the sums are largest, the evidence is a photo that says nothing about when it was taken. What transport had sorted out long ago was missing here. That is where EverStamp started.

Arjen Hoek

Sales & Partnerships

Arjen studied public administration and went on to work at large Dutch tech companies and at Microsoft. As Senior Client Director he saw up close how big organisations handle technology, and what they need before they will change a process: proof that it works, and someone to guide the project. One line came back again and again there: “Microsoft is a company that runs on trust.” Trust was not a marketing word but a condition for doing business, and that is the lesson he brings to EverStamp. When entrepreneurship called, he chose real estate, first as an investor and then as an entrepreneur. In practice he saw how messy gathering evidence still is: photos by email and WhatsApp, in loose folders, with no way to show when they were taken. It could be done better. At EverStamp he guides the customer, from the first conversation to the rollout across every branch.

Working at EverStamp

Want to build with us?

We are looking for people who want to help build photos that anyone can check for themselves: what is established, and what is not. The careers page is coming soon; until then we are glad to hear from you.

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