File analysis solution

I scrolled through SA and didn’t find a better site. If there’s a better place to ask please let me know.

We’re in need of a file analysis solution. We need a way to analyze and assess files with unknown contents that in some cases may have confidential information within them. Due to this risk of confidential information we either need a reputable cloud based company with a strong privacy policy and security measures, or an on-prem solution, with on-prem being preferred.

Anyone here have any suggestions? We’re open to either static-analysis or dynamic-analysis in our situation.