The Asian grocery stores in my area for some reason does not carry Malaysian sos cili (chili sauce) anymore for many years now, although they are still available from online stores. It's similar to ketchup but has a stronger chile flavor which I really like. It is not too hot, is sweet, and has the right amount of flavorings.
According to Wikipedia Malaysian Sos Cili has tomato puree, chili juice, sugar, salt and some other spices or seasonings to give the spicy, but not too hot, taste. There are sos cili that have no tomatoes though. Also, some countryside commercial varieties use bird's eye chile together with its seeds to raise the level of heat of the sauce.