Wasabi Technologies headquartered in Boston offers "hot cloud storage," object storage available pay-as-you-go as well as reserved capacity storage which they describe as tier free, and easily manageable. Additionally, Wasabi offers a Cloud NAS option, designed to be "hands free" and require minimal effort from administrators while having no impact on users and applications.
Azure was too expensive for a cold solution. While it was backed up across 3 different data centers, it wasnt worth the cost. Google cloud is comparable in price, but Google is Google. And they arent good for DoD backups as your data could end up in a foriegn datacenter.
Wasabi is a tiny bit more expensive than Backblaze B2 ($5.99 vs $5 per TB per month), and there are minimum storage size/time requirements (1TB, 3Mo), but Wasabi has free traffic each month up to the size of storage which can save you a lot of money.