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Amazon S3 vs Oracle Cloud Object Storage vs Zadara 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
4.8
Amazon S3 offers cost-effective data storage, scalability, and business benefits, despite challenges in quantifying ROI.
Sentiment score
4.2
Oracle Cloud Object Storage is cost-effective for backups, encryption, and access control, achieving a 30% ROI and high user ratings.
Sentiment score
8.2
Zadara offers cost-effective scalability, eliminating upfront investments with flexible, nearly limitless capacity, potentially saving 50% in time and money.
Moving infrequently accessed data to cheaper classes like Glacier is beneficial for long-term storage at a lower cost.
Information Security Analyst at a financial services firm with 201-500 employees
I have seen a return on investment, and the ROI that we observed in our organization includes reducing manpower by 20% and achieving zero downtime for storage expansion, which improves overall productivity.
Data Engineer at a tech vendor with 10,001+ employees
Amazon S3 has a reasonable price as you pay a flat price to use it.
Senior Data & AI Engineer at Imprint
The cost is not cheaper compared to AWS, and we have not seen the expected return on investment.
Cloud System Engineer at cloud251
 

Customer Service

Sentiment score
6.8
Amazon S3 support is knowledgeable and proactive, often resolving issues effectively, despite occasional slow response times and minor complaints.
Sentiment score
4.2
Oracle Cloud Object Storage support is friendly and capable, but experiences mixed reviews due to delays and expertise issues.
Sentiment score
8.2
Zadara's exceptional, 24/7 global customer service and technical expertise reduce user workload, earning high satisfaction ratings.
I rate the technical support from Amazon for S3 a ten out of ten.
CTO at Atulya Abhinav Tech Private Limited
The customer support for Amazon S3 is very good; they are responsive and knowledgeable, providing quick resolutions, clear documentation, and proactive guidance during migrations or performance tuning.
Data Engineer at a tech vendor with 10,001+ employees
An engineer is assigned based on the severity of the issue.
DevOps Engineer at Olla Systems Limited
When issues arise, it takes them at least three to four hours to respond.
Sr Quality Engineer at Accenture
I have a premium subscription for Oracle Cloud, which ensures a high level of support.
Cloud Specialist at a legal firm with 11-50 employees
Oracle is more cost-effective than competitors.
Oracle Technology Artchitect and Specialist at a tech services company with 501-1,000 employees
We lack adequate response times and a 24/7 service level agreement.
Cloud System Engineer at cloud251
I rate the technical support from Zadara as nine out of ten.
IT Technical Architect at AVALIS
 

Scalability Issues

Sentiment score
7.8
Amazon S3 is highly regarded for its scalability, effortlessly handling expanding storage needs and supporting diverse applications efficiently.
Sentiment score
7.7
Oracle Cloud Object Storage is praised for its efficient scalability, ease of management, flexibility, and straightforward access management.
Sentiment score
7.6
Zadara provides scalable, flexible workload management, supporting business growth with adjustable tiers and high performance for various needs.
Data placed in an S3 bucket is replicated across availability zones in a region, ensuring scalability and availability.
Information Security Analyst at a financial services firm with 201-500 employees
The level of scalability allows storage to automatically scale on demand, without the need for manual intervention.
AWS Consultant at Virtual University
The scalability of Amazon S3 is excellent as it handles unlimited data and seamlessly supports growth without manual provisioning or performance degradation.
Data Engineer at a tech vendor with 10,001+ employees
The scalability of Oracle Cloud Object Storage deserves a perfect ten as it can be scaled easily.
DBA Competency Manager at 4iApps
We can adjust the number of CPUs as per our need and reduce the load.
IT Manager at a manufacturing company with 1,001-5,000 employees
Zadara is a fully-fledged platform, and our customers are happy with its use.
Cloud System Engineer at cloud251
 

Stability Issues

Sentiment score
7.8
Users find Amazon S3 reliable and stable, praising its performance and availability despite minor latency and upload speed issues.
Sentiment score
7.5
Oracle Cloud Object Storage is highly dependable with minimal issues, rated 8/10 for stability, especially in dual-region setups.
Sentiment score
7.5
Users appreciate Zadara for its stability, high-availability, and reliability, noting minimal downtime and dependable performance in demanding environments.
There is zero latency or downtime.
AWS Consultant at Virtual University
Transitioning between S3 storage classes, like moving data from the standard class to Glacier or Glacier Deep Archive, has been challenging.
Information Security Analyst at a financial services firm with 201-500 employees
Amazon S3 is highly stable.
DevOps Engineer at Olla Systems Limited
The system is stable, especially when set up in a single region.
Cloud Specialist at a legal firm with 11-50 employees
 

Room For Improvement

Amazon S3 users face challenges with file management, speed, costs, security, setup, and request improved dashboard and technical support.
Oracle Cloud Object Storage needs security enhancements, easier usability, improved integration, better customization, and efficient billing management.
Zadara needs better communication, advanced features, broader support, improved infrastructure, and user-friendly upgrades to enhance market competitiveness.
An improvement could be associating the naming with personal accounts, allowing more familiar or desired names without conflicting with global conventions.
DevOps Engineer at Stellar Tech
The practice of protecting data could be more streamlined or mandatory.
Information Security Analyst at a financial services firm with 201-500 employees
I would like to see an increase in the data upload limit, similar to DynamoDB, where there is no data limit.
AWS Consultant at Virtual University
The product can be difficult to use compared to how it is marketed.
Sr Quality Engineer at Accenture
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.
Oracle Technology Artchitect and Specialist at a tech services company with 501-1,000 employees
The retrievability for Oracle Cloud Object Storage could be made simpler through the implementation of a GUI interface to retrieve data.
DBA Competency Manager at 4iApps
Adding AI capabilities could enhance the offering as well.
Cloud System Engineer at cloud251
Maintenance can also be complicated, especially when deeper troubleshooting requires navigating the CLI and searching for logs.
IT Technical Architect at AVALIS
 

Setup Cost

Amazon S3 offers competitive pay-as-you-go pricing, but retrieval and transfer across regions may increase costs.
Oracle Cloud Object Storage offers flexible pricing, appealing security features, though some find it costly for disaster recovery.
Zadara offers predictable pay-per-use pricing, with all-inclusive features and support, appealing to cost-conscious enterprise buyers.
I've used the free tier and haven't been charged yet.
DevOps Engineer at Stellar Tech
S3 offers multiple classes, allowing you to move data to cheaper classes for cost savings.
Information Security Analyst at a financial services firm with 201-500 employees
Since using Amazon S3, storage costs have reduced by around 35% to 40% through lifecycle tiering.
Data Engineer at a tech vendor with 10,001+ employees
The pricing for Oracle Cloud Object Storage deserves a perfect ten as it is very inexpensive.
DBA Competency Manager at 4iApps
It is an expensive product.
Sr Quality Engineer at Accenture
The pricing for Oracle Cloud is comparable to other cloud providers.
Cloud Specialist at a legal firm with 11-50 employees
The pricing is considered expensive.
Cloud System Engineer at cloud251
 

Valuable Features

Amazon S3 delivers scalable, secure storage with global access, robust data management, and cost-effective integration, enhancing operational efficiency.
Oracle Cloud Object Storage offers scalable, secure, and cost-effective solutions with high performance and multi-region support for large datasets.
Zadara offers flexible cloud integration, scalable storage solutions, and predictable costs with high performance, reliability, and user-friendly support.
Its stability and scalability are also impressive, as it allows for increased storage space according to demand.
DevOps Engineer at Stellar Tech
I appreciate its capability to create static websites and integrate with services like CloudFront, EC2, and DynamoDB.
Information Security Analyst at a financial services firm with 201-500 employees
Security measures like encryption, access controls, and the block public access feature are also important.
AWS Consultant at Virtual University
High availability, a large dataset, and stability are our main criteria for using this solution.
Sr Quality Engineer at Accenture
I find manageability, scalability, and security of the product most valuable.
IT Manager at a manufacturing company with 1,001-5,000 employees
It also provides multi-region support, enhancing data accessibility and safety.
Cloud Specialist at a legal firm with 11-50 employees
The most valuable feature is its storage management capability.
Cloud System Engineer at cloud251
Zadara's troubleshooting feature is very valuable for me.
IT Technical Architect at AVALIS
 

Mindshare comparison

As of April 2026, in the Public Cloud Storage Services category, the mindshare of Amazon S3 is 13.8%, up from 11.4% compared to the previous year. The mindshare of Oracle Cloud Object Storage is 3.4%, down from 4.1% compared to the previous year. The mindshare of Zadara is 2.2%, up from 1.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Public Cloud Storage Services Mindshare Distribution
ProductMindshare (%)
Amazon S313.8%
Oracle Cloud Object Storage3.4%
Zadara2.2%
Other80.6%
Public Cloud Storage Services
 

Featured Reviews

reviewer2774889 - PeerSpot reviewer
Data Engineer at a tech vendor with 10,001+ employees
Has reduced storage costs and improved data management through automated lifecycle and seamless service integration
The best features that Amazon S3 offers are high durability and availability with virtually unlimited storage, lifecycle management for automated tiering and cost control, versioning to retain and recover data changes, and integration with services such as Glue, Athena, EMR, Lambda, along with strong security via IAM roles, bucket policies, and encryption. These features help by ensuring data is always available, securely stored, and easily accessible for pipelines. Lifecycle policies reduce manual cleanup, versioning safeguards against accidental deletions, and integrations allow us to directly run analytics or trigger workflows without moving data around. Amazon S3 event notifications help automate tasks such as triggering ETL jobs or Lambda functions on new data arrivals, and features such as cross-region replication ensure data redundancy and compliance, while fine-grained access control makes it easy to manage permissions across teams securely. My organization has seen improvements in data accessibility, reduced infrastructure costs, and simplified data management through Amazon S3. We now have a unified scalable storage layer that supports analytics, backups, and migrations seamlessly, leading to faster workflows and better decision-making.
SureshKumar2 - PeerSpot reviewer
DBA Competency Manager at 4iApps
Experience significant cost savings through robust storage and seamless scalability
The usability of Oracle Cloud Object Storage could be enhanced, as retrieving data can be complicated unless one knows the correct method. For instance, when taking a backup for cloning purposes, there are specific steps that need to be followed, which many people are not aware of. This process could be simplified. The retrievability for Oracle Cloud Object Storage could be made simpler through the implementation of a GUI interface to retrieve data. This would make it more user-friendly. The setup for Oracle Cloud Object Storage could be more straightforward. Currently, we need to use standard formats for cURL scripts and other components.
Kirubel Behailu - PeerSpot reviewer
Cloud System Engineer at cloud251
Enhancing storage management efficiency with user-friendly experience
Our customers are using Zadara for their research and development environments. We provide infrastructure for government projects, but we are often not fully aware of their specific usage.  I typically use it for our infrastructure and offer both Zadara and Microsoft Azure to our customers Zadara…
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Top Industries

By visitors reading reviews
Manufacturing Company
10%
Marketing Services Firm
9%
University
8%
Computer Software Company
7%
Manufacturing Company
17%
Computer Software Company
9%
Healthcare Company
8%
Retailer
6%
Computer Software Company
13%
Construction Company
10%
Comms Service Provider
8%
Manufacturing Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business33
Midsize Enterprise18
Large Enterprise39
By reviewers
Company SizeCount
Small Business3
Midsize Enterprise3
Large Enterprise6
By reviewers
Company SizeCount
Small Business12
Large Enterprise4
 

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?
Since using Amazon S3, storage costs have reduced by around 35% to 40% through lifecycle tiering, data availability i...
What needs improvement with Amazon S3?
The only downside is the scalability limitations. I don't know if that is from AWS or my subscription.
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?
I would like to improve the solution in terms of Data Integration and Data Flow, in addition to the user experience.
What needs improvement with Zadara?
The initial installation was difficult because many steps required the command line interface (CLI). Maintenance can ...
What is your primary use case for Zadara?
I use this product as storage. Specifically, I use it as big storage. That's the main use case for Zadara ( /products...
What advice do you have for others considering Zadara?
As for the pros and cons, the main concerns are the complexity of the initial installation and the complicated mainte...
 

Also Known As

S3, Simple Storage Service
No data available
No data available
 

Overview

 

Sample Customers

Netflix, Airbnb, Thomson Reuters, Zillow, Alert Logic
Brinks
Time, Inc. A&E Network, The Washington Post, News UK, McGraw Hill, Gilt, Toshiba, Deloitte, VMware
Find out what your peers are saying about Amazon Web Services (AWS), Google, Nutanix and others in Public Cloud Storage Services. Updated: March 2026.
885,444 professionals have used our research since 2012.