The table below compares some of the fundamental Cloud Storage features provided by these three Cloud Storage giants.
|Amazon S3||Microsoft Azure||Google Cloud Storage|
|Reliability (durability & availability)|
|Stores data with up to 99.999999999% durability, with 99.99% availability. There can be no single points of failure. All failures must be tolerated or repaired by the system without any downtime||Keeps 3 copies of objects within a single region, a geo-redundancy option can create 3 additional copies||Delivers 99.9 percent or better uptime through its highly available, geo-redundant data-replication system|
|Can scale in terms of storage, request rate, and users to support an unlimited number of web-scale applications. It uses scale as an advantage: Adding nodes to the system increases, not decreases, its availability, speed, throughput, capacity, and robustness||Up to 500 TB of total storage per account. A single subscription supports up to 50 storage accounts, delivering petabytes of storage for the largest scenarios||You can store almost unlimited amounts of data and easily scale up or down|
|Supported libraries for developers|
|Available in 9 regions across 4 continents: US Standard, US West (Oregon), US West (Northern California), EU (Ireland), Asia Pacific (Singapore), Asia Pacific (Tokyo), Asia Pacific (Sydney), South America (Sao Paulo), and GovCloud (US) regions||Available in 12 regions across 4 continents: US Central (Iowa), US East (Virginia), US North Central (Illinois), US South Central (Texas), US West (California), Europe North (Ireland), Europe West (Netherlands), Asia Pacific East (Hong Kong), Asia Pacific Southeast (Singapore), Japan East (Saitama), Japan West (Osaka), Brazil South (Sao Paulo)||Available in 8 zones across 3 continents: US (us-central1-a, us-central1-b, us-central1-f), Europe (europe-west1-a, europe-west1-b), Asia (asia-east1-a, asia-east1-b, asia-east1-c)|
|Default region prices per GiB (from 0 to 5,000 TB).
Since May 1, 2015 Microsoft aligned its prices to Amazon S3 ones
|0-1 TB: $0.03, 1-50 TB: $0.0295, 50-500 TB: $0.029, 500-1,000 TB: $0.0285, 1,000-5,000 TB: $0.028, 0-1 TB: $0.03,||0-5,000 TB: $0.026|
|Some major customers|
|Netflix, Nasdaq, Dropbox, Slideshare, Instagram, Pinterest||XBox One, Mazda, Tesco||Ubisoft, JustDevelopIt, CloudLock|
- Amazon S3: http://aws.amazon.com/s3/
- Microsoft Azure: https://azure.microsoft.com/en-us/services/storage/
- Google Cloud Storage: https://cloud.google.com/storage/