Great news! Paying the W3DACH 2026 entry fee just got way easier.
We've launched card payment on our site using Simplepay!
If you've already registered for W3DACH, simply log in and head to the competition page.
There you'll find the PAY WITH CARD button. Click it, enter your billing details, and you'll be redirected to the payment interface.
After a successful payment, you'll be sent straight back to the hdh site, where your status will immediately update to PAID.
The system will also send you a confirmation email and the invoice right away.
try it out: https://hdhiaa.net/competition/w3dach2026