PurpleFire is an ecommerce growth agency powered by over 5,700 split tests across brands like True Classics, Neuro, and Woodupp. They cover CRO, PPC, email marketing, Facebook ads, and landing pages using a proprietary EcomLab system. Case study ROI ranges from 2.35x to 22.36x. They use a squad-based model where 4-6 category specialists work on each account.