Which services should you use to pull credit?
The key is to find out your client goals? Mortgage, Car, (Bank Card can be obtained via a secured card)
If they are seeking to obtain a mortgage, The best source is MYFICO since most mortgage lenders use FICO scores. But keep in mind that lenders use multiple score to evaluate a credit risk e.g. auto scores, bankcard scores…
Annual Credit Report is a great source too.
If they are seeking a car is is ok to pull all other sources e.g. credit karma and others.