JetBrains’ AI code suggestions were only trained on code where authors gave explicit permission for it, but that’s the only one I know from the top of my head. Most chat-oriented LLMs (ChatGPT, Claude, Gemini…) were almost certainly trained using corporate piracy.

There are a number of open weight open source models out there with all their data sourced from the public domain. Look up BLOOM and Falcon. There are others.