| Challenger | School | Country | |
| WixazZ | EFREI | France |  |
| Wolff | ESIEA | France | |
| Woni | Telecom SudParis | France | |
| Worty | ESNA | France | |
| xanhacks | Université Bretagne Sud | France | |
| Xinruk | ESIEA | France | |
| xThaz | ENSIBS | France | |
| xtr3m | CentraleSupélec | France | |
| y0mmm | CentraleSupélec | France | |
| y0us | ENSIBS | France | |
| Yisrow | EFREI | France | |
| Yopoptop | ESIEA | France | |
| Yug3n | Pôle Universitaire Léonard de Vinci | France | |
| Yuri | CentraleSupélec | France | |
| z3gh0st | ESNA | France | |
| zaikoe | Other | France | |
| Zak | ENSIBS | France | |
| Zandros | ENSIBS | France | |
| ZangoDozo | ENI École Informatique | France | |
| Zaptorg | ENSIBS | France | |
| ZayrroX | ENSEIRB Bordeaux | France | |
| Zebra | ENSICAEN | France | |
| zeo | Tallinn University of Technology | Estonia |  |
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