There are two major bus companies in Uganda travelling to Nairobi and elsewhere. One is the Scandanavian, the other is the Akamba. Both are well known, and trustworthy as much as that can be said... lol... The Scandanavian is more reliable than the Akamba, but does not do night trips, which saves time as u can sleep instead of having a rather long, hot, and tiresome journey during the day. The Akamba does both.