Hart SEO Hart SEO Jacksonville, Florida Hart SEO is based out of Jacksonville, Florida. Hart SEO was established on May 1st, 2017 in Jacksonville, Florida by Jon Hart. The Company has already helped several businesses already get high ranking on Google, Yahoo, and Bing. Here at Hart SEO we love seeing small businesses take off with our expertise in the SEO/ web design field. Call to schedule an Appointment (904) 234-0158