The Amazon S3 Glacier storage classes are purpose-built for data archiving, providing a low cost archive storage in the cloud. According to AWS, S3 Glacier storage classes provide virtually unlimited scalability and are designed for 99.999999999% (11 nines) of data durability, and they provide fast access to archive data and low cost.
$0
Per GB Per Month
Global Relay Archive
Score 9.0 out of 10
N/A
Global Relay, headquartered in Vancouver, offers Global Relay Archive, a system for managing and archiving unstructured data (e.g. IM, email, etc) in a compliant manner.
As described in the use case, it is perfect for backup data storage where you do not expect to retrieve the data often. Think of it as a data dump; it is nice to know you have a backup, but it actually is expensive and somewhat difficult to retrieve everything.
If you have a finance company and are bound by certain compliance rules then Global Relay is the gold standard. It does cost more than typical Exchange archival solutions so regular non-compliance organizations can look at other options. We have had multiple events that required the use of Global relay some simple some much more complicated. They came through every time.
Amazon Glacier isn't a direct competitor to the products I've listed; it could compare to the clouds/data warehouses each of these products use to store their data. In the case of CloudBerry, Amazon Glacier is used with it to create a complete archival backup system. That said, when using Amazon Glacier along with a product like CloudBerry, you can create a reliable, inexpensive cloud backup system for retaining HUGE quantities of data for much less than these other cloud backup solutions. HOWEVER, if you want to restore said data, the cost and complexity begin to become a major concern, so Amazon Glacier should only be considered in situations where you don't plan to touch the data regularly, if at all, once it's at Glacier.
Exchange Online Archiving is fine but the gold standard for finance is Global Relay. Most clients will go outside of MS for compliance-related archiving.