In my last post about inmate service companies (see Are You Being Served?), I introduced you to a handful of small companies catering to the specific needs of inmates. This week in the series I’m introducing you to some of the large players involved. The most prominent of these large companies are Global Tel Link (GTL), CorrLinks, and JPay. Each company contracts with dozens of states providing electronic services to prisoners in state and federal facilities. I first mentioned these three companies in my 9/23/19 post Captured Clientele.