This study explored potential influence of a text-based program for fathers of children on the autism spectrum. Fathers (N = 184) were recruited through autism services across Australia. Participants received messages focusing on five domains: (a) relationships with parenting partner; (b) formal support; (c) father-child interaction; (d) understanding autism; and, (e) coping. Surveys explored parenting stress, co-parenting quality and autism-specific parenting self-efficacy. Eighty-eight percent completed the program, 43.6% completed pre and post surveys. There was significant reduction in parenting stress (p < 0.01) and increase in autism-specific parenting self-efficacy (p < 0.01). Effect sizes indicate these may be clinically meaningful. This highly scalable intervention has potential to influence factors that shape and sustain relationships fathers share with their children on the autism spectrum, families and services.