Citizens of the following countries do not need visa for entering Ethiopia; Djibouti and Kenya.
Tourists from most countries can get e-visa online or visa on arrival. Check https://www.evisa.gov.et/client
Note that conference visitors are not supposed to travel on tourist visa.
Ethiopian Airlines has made sure that all Summit participants can get visa upon arrival. You must send a copy of your passport latest 10 working days prior the conference starts.
Contact us for eventual questions and send copy of passport to firstname.lastname@example.org