Bad part Experian update score once a month. They are always off lately on balances. They've gone downhill. Equifax seems to be the best, which I only see free through Credit Karma. Equifax has definitely been the closest and most accurate of all. I have used Credit Sesame, Credit Karma and Credit Wise. Credit Karma updates frequently with Transunion and Equifax. Transunion which is the worst in my opinion is always way off. Never accurate in my opinion. Equifax seems to be most reliable 4 now.