What about banking initiatives in EU causing every bank to open up their data via API. That seems pretty private and confidential.

https://www.evry.com/en/news/articles/psd2-the-directive-tha...

ChainLink has an option to use Intel SGX along with TownCrier to provide trusted execution at the processor level. That ensures confidentiality without exposing the data at all.

http://www.town-crier.org/