Compare Pure Evergreen//One and NetApp Keystone. NetApp Keystone Pure Storage Evergreen//One Highest performance level Extreme – 12228 IOPs/TiB Ultra – 2000 IOPs/TiB Best value for money* Capacity from $24/TiB and performance from 2c/IO/TiB Capacity from $43/TiB and performance from 11c/IO/TiB Highest service level agreement Five nines Four nines Services and technology to help you get the right fit the first time Workload Analysis Cloud Insights N/A Burn down your public cloud commit with multicloud management including with first party cloud services Cloud Manager with FSX-NetApp ONTAP, Azure NetApp Files and Netapp Cloud Volumes for Google Cloud No 1st party public cloud services Automated cold data tiering We move cloud data blocks to lower cost storage automatically and saving our customers 50%.