Azure Storage compared to Amazon S3

Azure Storage
Amazon S3


Storage Features of Azure Storage compared to Amazon S3
Azure StorageFeaturesAmazon S3
Cloud based
GDPR Compliant
On premise
Open source
Versioned files
Cross Region Replication
S3 Compatible API
Portal, CLI, REST apiManagement interfacesPortal, CLI, REST api
Event hooks/pubsub
Best effort. Credits below 99.9%. That is 43 minutes of downtime allowed per month without having to issue creditsSLABest effort. Credits below 99.9%. That is 43 minutes of downtime allowed per month without having to issue credits
~4.75 TBMaximum object filesize5 TB

A 0 byte file has at least 4 bytes of chargeable overhead for metadata.

Formula: 4 bytes + Len (PartitionKey + RowKey) * 2 bytes + For-Each Property(8 bytes + Len(Property Name) * 2 bytes + Sizeof(.Net Property Type))

Minimum object filesizeA 0 byte file has 8 KB of chargeable overhead for metadata.
Unlimited, as long as you stay under 5PB across your accountRecommended max file count per bucketunlimited
Max filesize for a bucketunlimited
unlimitedMaximum amount of buckets500 - upgradable if you need it.
Shared access signature allows authenticated access to objectsAuthentication / ACLAmazon has designed their very own PreSigned URL mechanism which is now used globally across providers
Azure Storage integrates with Azure’s as well as any other CDN directlyCDN integrationS3 integrates seamlessly into Amazon’s CloudFront CDN, as well as other CDNs
Azure Storage doesn’t have special interconnects publishedPeering & interconnect
Unsupported Paid Feature Supported Unknown


Azure Storage

Microsoft Azure Cloud Storage Microsoft’s answer to their cloud competitor Amazon is finally here. Microsoft has a wide range of storage solutions, providing SaaS (software as a service), PaaS (platform as a service ) and IaaS (infrastructure as a service). Azure supports a great variety of programming languages, tools, and frameworks, ranging from Microsoft-specific to Linux, or other third-party software and systems.

In the table below we’ll look at the Hot Access Tier, as this is the most commonly used storage tier for online usage.

Amazon S3

World’s biggest Cloud Storage Provider. Amazon, traditionally an online book store, has put a target on the cloud compute space when it shifted its focus to Amazon Web Services (AWS) in 2006. E-Commerce competition was tough, but public cloud companies back then were scarce, and usability and user friendly products were a long way from being invented.

Amazon’s reign on cloud computing has left its mark in public cloud-land. Competitors have trouble keeping up, if they even get to a point of feature-parity at all. With Amazon’s S3 storage being one of the first, it has basically dictated a standard for the public cloud’s blob storage protocol.

Needless to say, Amazon invented the S3 (Simple Storage Service) standard.