13 Best Background Check Sites & Services: Search Criminal Records and Social Media Accounts Online 30+ hours of research | 3 expert interviews | 25 sites tested Crowdzie FacebookTwitterEmail (Ad) It can take months to get to know someone, but most of us don’t have that kind of time. If you need to truly know someone fast—especially if you’re thinking of offering them a job—then one of your best options is to use a background check service. These sites reveal a person’s criminal history, social media accounts, current, and past addresses—even speeding tickets. This information can help you decide if you can trust someone with your business, family, or possessions.