You can buy tickets for your fellow travellers at the same time as you're buying tickets for yourself. You do this by changing number of passengers while planning the trip. In the checkout step named "Passenger details", you're able to enter all information needed about the passengers who will join you on the trip. Make sure to enter these details as they appear in everyones passport or national ID card that they bring with them on the trip, if not the ticket may not be valid. There's no way to split payments in our service, yet. One person will have to pay for all passengers, which is done in the very last step of the checkout process.