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Amazon S3 vs Microsoft Azure Block Storage vs Oracle Cloud Object Storage comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
4.9
Users report positive ROI from Amazon S3 due to cost savings, scalability, data integrity, and advanced analytics benefits.
Sentiment score
4.3
Microsoft Azure Block Storage offers significant cost savings and ease of management, proving valuable for data backup and disaster recovery.
Sentiment score
4.7
Oracle Cloud Object Storage is secure, cost-effective, and highly rated for code backup and deployment, despite modest financial returns.
Moving infrequently accessed data to cheaper classes like Glacier is beneficial for long-term storage at a lower cost.
Amazon S3 has a reasonable price as you pay a flat price to use it.
 

Customer Service

Sentiment score
6.7
Amazon S3 support is knowledgeable and helpful, but users desire faster response times; documentation reduces support necessity.
Sentiment score
5.0
Microsoft Azure Block Storage support is responsive for priority issues, but delays and expertise inconsistencies challenge users.
Sentiment score
4.6
Oracle Cloud Object Storage offers satisfactory support, with mixed reviews on response times and expertise, improved by premium subscriptions.
I rate the technical support from Amazon for S3 a ten out of ten.
An engineer is assigned based on the severity of the issue.
The technical support for Amazon S3 is rated ten out of ten.
Support quality is good, but the main issue is the delay in handling tickets.
The response time for enterprise support needs improvement.
When issues arise, it takes them at least three to four hours to respond.
I have a premium subscription for Oracle Cloud, which ensures a high level of support.
Oracle is more cost-effective than competitors.
 

Scalability Issues

Sentiment score
7.9
Amazon S3 is praised for its scalability, flexibility, and security, ideal for enterprise-level applications despite cost considerations.
Sentiment score
6.8
Microsoft Azure Block Storage offers reliable scalability, supporting auto-scaling and manual scaling to meet diverse enterprise requirements efficiently.
Sentiment score
7.6
Oracle Cloud Object Storage is praised for its scalable, flexible management, allowing seamless resource adjustment and efficient growth.
Data placed in an S3 bucket is replicated across availability zones in a region, ensuring scalability and availability.
The level of scalability allows storage to automatically scale on demand, without the need for manual intervention.
Amazon S3's automatic scaling has benefited me, as I don't need to plan storage requirements.
The ability to scale is well-supported.
It is a significant advantage of the product.
We are on a premium plan, which should handle scalability automatically.
The scalability of Oracle Cloud Object Storage deserves a perfect ten as it can be scaled easily.
We can adjust the number of CPUs as per our need and reduce the load.
 

Stability Issues

Sentiment score
7.8
Amazon S3 is highly stable and reliable with excellent performance, minimal maintenance, and slight security and upload speed concerns.
Sentiment score
7.5
Azure Block Storage is generally stable, with high ratings, though some large users report regional reliability concerns.
Sentiment score
7.3
Oracle Cloud Object Storage is highly stable and reliable, consistently rated positively for availability and performance by users.
There is zero latency or downtime.
Transitioning between S3 storage classes, like moving data from the standard class to Glacier or Glacier Deep Archive, has been challenging.
Amazon S3 is highly stable.
It isn't as stable as sound storage systems in a premise environment.
Overall, the stability is very good.
None of the other storage vendors have all these features so easily manageable and fast to set up as Block Storage.
The system is stable, especially when set up in a single region.
 

Room For Improvement

Users want a more intuitive Amazon S3 interface, enhanced speed, security features, simplified pricing, and better service integration.
Microsoft Azure Block Storage needs better documentation, UI, support, pricing flexibility, security, third-party integration, and performance improvement.
Oracle Cloud Object Storage needs enhanced security, improved integration, better usability, and features similar to Azure and AWS.
An improvement could be associating the naming with personal accounts, allowing more familiar or desired names without conflicting with global conventions.
The practice of protecting data could be more streamlined or mandatory.
I would like to see an increase in the data upload limit, similar to DynamoDB, where there is no data limit.
Its compatibility with various platforms could be enhanced to allow for a seamless operation across different cloud environments.
Some alternatives are cheaper and available for long trial periods before the payment.
Enabling SFTP on Microsoft Azure Block Storage didn’t allow us to get the IP address, as Azure doesn’t support it.
The product can be difficult to use compared to how it is marketed.
I would like to know about integration with other Oracle Cloud services and whether it is easy to integrate Oracle Cloud Object Storage with other Oracle Cloud solutions.
The retrievability for Oracle Cloud Object Storage could be made simpler through the implementation of a GUI interface to retrieve data.
 

Setup Cost

Amazon S3's pay-as-you-go model offers cost-effectiveness, though advanced features may increase expenses compared to competitors.
Microsoft Azure Block Storage offers pay-as-you-go pricing, seen as competitive yet pricey, with discounts available for specific usage.
Opinions on Oracle Cloud Object Storage pricing vary, with options for subscriptions, credits, and flexible payment models impacting costs.
I've used the free tier and haven't been charged yet.
S3 offers multiple classes, allowing you to move data to cheaper classes for cost savings.
It is somewhat justified due to the benefits, but there is room for reconsideration.
For medium-sized companies, especially when discussing cost and scalability, it can be quite expensive.
The cost for Azure Data Factory, utilized for intensive data migration, was high but expected, as it's a one-time activity.
It is reasonable, however, it can be cheaper.
The pricing for Oracle Cloud Object Storage deserves a perfect ten as it is very inexpensive.
It is an expensive product.
The pricing for Oracle Cloud is comparable to other cloud providers.
 

Valuable Features

Amazon S3 is favored for its security, scalability, unlimited storage, and integration with AWS, ideal for diverse data needs.
Microsoft Azure Block Storage offers scalable, reliable storage with encryption, easy management, and seamless integration, supporting diverse data types and fast access.
Oracle Cloud Object Storage provides scalable, secure storage with high availability, cost-effectiveness, and comprehensive features like multi-region support.
Its stability and scalability are also impressive, as it allows for increased storage space according to demand.
I appreciate its capability to create static websites and integrate with services like CloudFront, EC2, and DynamoDB.
Security measures like encryption, access controls, and the block public access feature are also important.
The tool allows me to download to my device, control access, and manage data with ease.
The ability to increase and scale out is really easy, allowing us to manage a large amount of data with reduced dependency on scalability issues.
I can store data, use the storage account as a queue, and the pricing is also quite economical.
High availability, a large dataset, and stability are our main criteria for using this solution.
I find manageability, scalability, and security of the product most valuable.
It also provides multi-region support, enhancing data accessibility and safety.
 

Mindshare comparison

As of October 2025, in the Public Cloud Storage Services category, the mindshare of Amazon S3 is 14.1%, up from 11.5% compared to the previous year. The mindshare of Microsoft Azure Block Storage is 1.0%, up from 1.0% compared to the previous year. The mindshare of Oracle Cloud Object Storage is 3.9%, down from 4.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Public Cloud Storage Services Market Share Distribution
ProductMarket Share (%)
Amazon S314.1%
Oracle Cloud Object Storage3.9%
Microsoft Azure Block Storage1.0%
Other81.0%
Public Cloud Storage Services
 

Featured Reviews

Roberto Costa - PeerSpot reviewer
Have used multiple features effectively and find the pricing reasonable
What I appreciate most about Amazon S3 is the tiering of the objects; with the tiering, we can determine if an object won't be accessed frequently and send it to cold storage or a Glacier storage unit, which greatly lowers AWS costs. The inventory feature, called S3 Inventory, is a cool feature as well. The object access point is another notable feature. Amazon S3 has many useful features; I can simply host my website, which has to be a static web page, but even so, it's beneficial to put my code inside of Amazon S3 as a static website that people worldwide can access. I have worked with many petabytes of data stored in Amazon S3, and I have never had any performance issues, stability issues, or anything similar.
MatsHagberg Olsson2 - PeerSpot reviewer
Empowers secure data management with affordable tools and minimal hassle
The most valuable feature is that it's very affordable in comparison to competitors. The absolute best feature is the Azure Storage Explorer tool. The tool allows me to download to my device, control access, and manage data with ease. Additionally, the joint use of Azure portal further facilitates management depending on my location.
PriyankShrivastava - PeerSpot reviewer
A workhorse that enables high availability but support has room for improvement
There is always room for improvement. When a product is marketed, many claims are made, but in reality, it does not always perform as expected. The usability and real-time capabilities could be enhanced. The product can be difficult to use compared to how it is marketed. Technical support also lacks a timely response.
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Top Industries

By visitors reading reviews
Computer Software Company
16%
University
9%
Financial Services Firm
8%
Manufacturing Company
8%
Manufacturing Company
14%
Computer Software Company
13%
Healthcare Company
10%
Performing Arts
10%
Manufacturing Company
17%
Computer Software Company
13%
Financial Services Firm
9%
Healthcare Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business33
Midsize Enterprise17
Large Enterprise38
By reviewers
Company SizeCount
Small Business25
Midsize Enterprise13
Large Enterprise24
By reviewers
Company SizeCount
Small Business3
Midsize Enterprise3
Large Enterprise5
 

Questions from the Community

What do you like most about Amazon S3?
We can easily connect to the AWS resources.
What is your experience regarding pricing and costs for Amazon S3?
AWS pricing for Amazon S3 starts at a higher cost, particularly in the standard class. However, with lifecycle manage...
What needs improvement with Amazon S3?
That is a hard question; I cannot think of any improvements right now because all the necessary features are already ...
What do you like most about Microsoft Azure Block Storage?
We use the solution to develop SaaS platforms on Azure. We utilize various Microsoft components like block storage an...
What is your experience regarding pricing and costs for Microsoft Azure Block Storage?
Our experience with pricing has been positive. The budget for Microsoft Azure services has been within expectations f...
What needs improvement with Microsoft Azure Block Storage?
Based on my experience, the feature they need to introduce for Microsoft Azure Block Storage is key rotations and asy...
What do you like most about Oracle Cloud Object Storage?
The solution's most valuable features are its speed, unlimited space, and simplicity of use.
What is your experience regarding pricing and costs for Oracle Cloud Object Storage?
The pricing for Oracle Cloud Object Storage deserves a perfect ten as it is very inexpensive.
What needs improvement with Oracle Cloud Object Storage?
The usability of Oracle Cloud Object Storage could be enhanced, as retrieving data can be complicated unless one know...
 

Also Known As

S3, Simple Storage Service
MS Azure Block Storage
No data available
 

Overview

 

Sample Customers

Netflix, Airbnb, Thomson Reuters, Zillow, Alert Logic
Mazda, BlinkBox, Rakuten Showtime, Xbox One, Serko, ChronoDrive
Brinks
Find out what your peers are saying about Amazon Web Services (AWS), Google, Microsoft and others in Public Cloud Storage Services. Updated: September 2025.
869,760 professionals have used our research since 2012.