multi-cloud management link/transfer between Microsoft OneDrive and Apple iCloud Drive

I want to have my identical real time data in both Microsoft OneDrive cloud and Apple iCloud Drive. IDK, maybe I'm paranoid, but I don't like putting all my eggs in one basket. Do the big boys cooperate or are most cloud services rather covetous of their users' intellectual property. Any options here for ways and means or even third party services to link a/o transfer between these two giants would be really appreciated. Thanks so much...