A parallel 2-arm, hybrid type 1 cluster randomized controlled trial compares ESDM and EBI interventions for autism, recruiting 20 CBAs, 20 regional managers, 100 Regional Teams, and 300 child/caregiver dyads. Regions are randomized to ESDM or EBI to prevent contamination, with constrained randomization considering insurance mix and size. ESDM focuses on embedded teaching objectives within play, using developmental and ABA principles, while EBI primarily uses Discrete Trial Teaching. Caregiver involvement is integral, with ESDM providers trained in caregiver coaching strategies. The study aims to assess child social communication and language, adaptive behavior, quality of life, and caregiver competence, with mechanisms including social motivation and caregiver NDBI fidelity. Video data collection and coding ensure observational outcomes are assessed reliably. The trial employs mixed-effects modeling to analyze clustered data, with power analyses indicating sufficient sample size to detect significant improvements in social communication and language.