Below are some hotel options in and around Lausanne. Most of these have fixed rates for Psi-k attendees (for those, prices and booking details are given below): book quickly because unbooked rooms will be released by end of June in most hotels. A few of the hotels below do not pre-book rooms for large events but are nevertheless highly recommended. These are by no means the only accommodation options and we certainly recommend that you explore other possibilities.
A short metro ride to the conference venue, your hotel will give you a card to take public transportation for free. Details here.