Ethics of using company data from internship for academic project I am a graduate student and one of my research projects requires me to crawl a website using their public API.  This is going alright but the amount of data we can collect is limited, since it is a public API.

As it happens, I will be doing an internship at the company that owns that website, and will soon have access to an unlimited supply of their data.  Is it okay if I use that data for my academic research project, or will they expect me to only use their data for projects relating to my internship?
You should ask the company where you do your internship. Perhaps they are fine with whatever you want to do. Perhaps they will allow you to use their data but only release summaries, not the raw data. Perhaps they will require you to anonymize it.

In addition, how will you do the analysis? Will you take the company's data and transfer it to your own computer? (This may well not be welcomed by the company.) Or do you plan on using a company-supplied machine to do your analyses? (Same problem - companies don't necessarily like it if you use their hardware for what are essentially personal tasks.) Do you want to install third party software to analyze your data on their machines?

Think through what you want to do, then go to your supervisor. Depending on their personality, people may even be interested in working with you on this, perhaps get a publication out of it.

Whatever you do, don't, don't, don't just use the data without asking. Whether or not you sign an NDA.