transfer service from salzburg to Cesky Krumlov

Here are two from Google: http://www.ckshuttle.cz/bus-cesky-krumlov-transfer/ http://www.beanshuttle.com/en/transfers/ Disclaimer: I've never used either.

Today we used Czech Shuttle (czechshuttle.cz) to transfer from Cesky Krumlov to Linz, Austria. They also advertise shuttles to Salzburg and many other places. We were picked up at our hotel on time by a young, English-speaking, courteous driver in what appeared to be a private car. All went well and I recommend Czech Shuttle.