A list of GPT-3 and Codex clients was announced by Microsoft’s Satya Nadella and OpenAI’s Sam Altman in October 2022:

Accenture, AI Busters, Alert Innovation, American Fidelity, Aon, Arvato Bertelsmann, Autodesk, Avanade, BMW, Carmax, Cipio.ai, Clevertar, Cognizant, Databook, Downer, EY, Farmlands Cooperative, Genie AI, Elsevier Health, HSBC, IFAD, Inpris, Inward, Kept, Klaviyo, Morgan Stanley, National Nederlanden, PwC, Shell, Snelstart, Sogeti, Soul Machines, Strabag, Trelent, Wipro, WordLift, Zammo.ai