How to reach us

CAB ETH Zurich


You can send Letters, parcels or fan mail to our postal address:

Swiss Olympiad in Informatics
ETH Zürich, CAB F15.1
Universitätstr. 6
CH-8092 Zürich


If you prefer it simpler, faster and cheaper you can send us an email to

SOI Twitter

Facebook, Twitter, Instagram

We have a Facebook page, where we will post news regarding the contest. You can also find us on Instagram and Twitter.

Reddit, Discord

We are on Reddit and Discord as well. You can ask us questions, give feedback or discuss with other participants. Of course we will look into it often and answer questions and help with problems.

If you don’t know Reddit: Reddit is like a bulletin board, where you can post text entries (e.g. a question) or link entries (e.g. a cool problem you found and want to share with the other participants). Each user can comment and vote on those entries and other comments.

If you don’t know Discord: Discord is a chat service like IRC. Here you can communicate directly with other SOI participants and leaders. There are various channels for everything from organization to your favourite pancake topping.