It depends on what you’re looking to get out of it. If you want extra features, such as identity theft insurance, then IDnotify is a good service that will provide you with insurance plus all of the extra benefits, such as credit monitoring and social media scanning.  If you’re looking to keep an eye on your credit score and see what you can do to improve it, there are free services, such as CreditKarma or MoneyLion that will help without a monthly fee.