what are you looking to use cloud storage for? What region are you located? What's your budget? Do you require very long-term retention? If you're in the United States or the EU then you have access to not only the big three Amazon, Azure, Google, but also access to Backblaze B2 and Wasabi. If you provide more details about what you're looking to do we may be able to make some suggestions for you.

Also check out this white paper: https://get.msp360.com/whitepaper/how-to-choose-cloud-storage/