1. You need something called a technographics tool to find companies that use a specific enterprise technology. Bloomberry comes to mind. Here’s the data they have on new ChatGPT customers:
https://bloomberry.com/data/chatgpt/ . They track companies not individuals so you wont get contact info unfortunately.
Other options if you need contact data also include: Apollo.io and Zoominfo.
2. You can search job postings for companies that mention “chatgpt” and “training”/“provisioning” or something like that captures companies that just started using ChatGPT.
Not a perfect method and u probably need to go through a lot of false positives, but its doable IMO.
3. Go hang out in the official OpenAI community https://community.openai.com/ and you will likely find people asking questions on how to get started, etc. Not sure how u could cross link them to the company (maybe googling if their name is unique)
4. Find some Slack community for ChatGpT beginners. Not sure of any on the top of my head.