If you want to see the ranking of any Singapore maid agency and its services, you can check how it is rated in MOM (Ministry of Manpower), an Employment Agency Directory (EA). The higher the volume of placements, the high is its rating.
There can be few Singapore maid agencies that do not carry good volume of placements. But this does not mean they are not good. Consider the agency’s stars it carries because number of placements is actually not statistically significant. Best Housekeeper is an agency in Singapore with good star rating and is also considered excellent as this agency does not carry any demerit points.