Santepheap Hotel
Rue Sumamarit
+855 72 971537
Singles US$7, doubles US$15
This has long been the standard choice for tour groups, and has a small restaurant. Rooms come with hot running water and some cable channels even though you probably didn't come to Kratie to watch TV, but the bathrooms are generally dirty,. WiFi in reception.
Oudom Sambath Hotel
Rue Sumamarit
+855 72 971502
Singles US$8, doubles US$15 (goes down to 5$ in low season)
Probably the best hotel in town, and some of the top-floor rooms offer good views of the Mekong. Service can be a bit slow. Has WiFi in most rooms.
As Kratie has developed rather nicely to meet the demands of visitors, and so there are several recommended guesthouses.