Overview. PromiseOne Bank (f/k/a NOA Bank) was established on November 6, 2008 by a group of individuals who shared a vision to create a true community bank that would serve our community and its diverse population. We started our banking operation from our main branch in Gwinnett County and have expanded our geographic footprints to Dekalb and Fulton Counties by opening two additional full-service branches in Doraville and Johns Creek. With dedi...