About Cardmos
Cardmos is the software for trading card dealers and collectors: inventory, prices, sales and trades in one place. This is why it exists.
I built Cardmos because as a collector and dealer, I couldn't find a tool as beautiful as the cards themselves.
Dennis OederFounder of Cardmos

The observation
Cardmos grew out of a simple observation: the software around trading cards rarely does the cards justice. Inventory ends up in spreadsheets, prices are maintained by hand, and the public showcase looks like a database.
The collection book
We build Cardmos as a digital collection book that can do both – manage tidily and show beautifully. The owner never types master data: they search the card, set condition and price, everything else comes automatically.
Our brand, open to others
Cardmos is our own brand first. Because the foundations – inventory, market, show, presence – apply to every card dealer, Cardmos is also meant as a white-label product that other dealers can use under their own brand.
Calm and thorough
We develop calmly and thoroughly. We prefer a few things that feel valuable over many that just tick boxes.