Dell PowerScale (Isilon) vs QoreStor comparison

Dell Technologies and Quest Software are both solutions in the File and Object Storage category. Dell Technologies is ranked #3 with an average rating of 8.8, while Quest Software is ranked #23 with an average rating of 7.0. Dell Technologies holds a 8.6% mindshare in FaOS, compared to Quest Software’s 0.1% mindshare. Additionally, 96% of Dell Technologies users are willing to recommend the solution, compared to 100% of Quest Software users who would recommend it.

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Executive SummaryUpdated on Aug 19, 2025

Dell PowerScale and QoreStor compete in the data storage and management solutions category. Dell PowerScale has the upper hand due to its scalability, comprehensive feature set, and robust technical support, appealing to large-scale operations.

Features: Dell PowerScale is noted for its scalability, advanced data management with SmartQuotas, and performance monitoring through CloudIQ. It facilitates managing petabyte-scale data easily. QoreStor is recognized for exceptional data deduplication and compression capabilities, effectively reducing storage costs. It integrates well across various hardware platforms offering significant flexibility.

Room for Improvement: Dell PowerScale can be complex and costly for smaller environments, needing improved cloud integration and clearer storage utilization insights. Enhancements in metadata management are also desired. QoreStor could improve in cloud integration and ransomware protection, with better automation in monitoring and diagnostics being an area of user interest.

Ease of Deployment and Customer Service: Dell PowerScale deployment is mainly on-premise, offering robustness but limited hybrid setup flexibility. It receives consistent technical support, although experiences can vary at first-line support. QoreStor is praised for simpler deployment, flexibility across hardware, and intuitive customer service.

Pricing and ROI: Dell PowerScale provides extensive features and scalability but at a higher initial cost. Its pricing model becomes manageable when considering total cost ownership and long-term value, particularly in complex environments. QoreStor is favored for its flexible pricing, suited to managed services and incremental growth, delivering a cost-effective alternative for smaller setups.

To learn more, read our detailed Dell PowerScale (Isilon) vs. QoreStor Report (Updated: July 2025).

Buyer's Guide

Dell PowerScale (Isilon) vs. QoreStor

July 2025

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Review summaries and opinions

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

Categories and Ranking

Pure Storage FlashBlade

Mindshare comparison

As of September 2025, in the File and Object Storage category, the mindshare of Pure Storage FlashBlade is 5.7%, down from 6.2% compared to the previous year. The mindshare of Dell PowerScale (Isilon) is 8.6%, up from 8.2% compared to the previous year. The mindshare of QoreStor is 0.1%. It is calculated based on PeerSpot user engagement data.

File and Object Storage Market Share Distribution
Product	Market Share (%)
Dell PowerScale (Isilon)	8.6%
Pure Storage FlashBlade	5.7%
QoreStor	0.1%
Other	85.6%

File and Object Storage

Featured Reviews

Eric Black

Solutions Architect at Recovery Point Systems

The ability to leverage multi-tenancy along with immutability is a huge benefit for us

The only thing I feel FlashBlade is missing is the SOS API. If it had SOS API, that would put it well over the top. Veeam Backup specifically has started to streamline their API, and they are doing that with SOS API. They have optimized it. Any of the S3 devices out there that support this SOS API can have far more API calls at once. On our side, that translates to better restoration. With SOS API, it can leverage far more restorations at a single given time or read from the device in simple terms. That results in maximizing the output and throughput from the device itself.

Read full review

Scott Taylor

Senior Infrastructure Specialist at a healthcare company with 10,001+ employees

Manages large data sets efficiently with hybrid cloud integration

My organization is quite large, with about 30,000 employees. The growth has been substantial in areas such as radiology and genomics. One of the best features we've utilized recently is offload to cloud pools due to capacity constraints on-premise. We didn't want to expand Dell PowerScale (Isilon) straight away, so we utilized cloud pools to offload some data to Azure. That's really saved us in certain areas as we didn't have funding to expand Dell PowerScale (Isilon) until next year, which is why we utilized the cloud pools functionality to offload.

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Jeff Manuszak

CTO at EDSI

Cost-efficient, highly scalable, and installable on different types of hardware

They could improve on support a little bit. We have not had to engage their support much, but when we do have issues, it can take longer to get things resolved. We are pretty lenient as we do a lot of IT support ourselves. We are not very hard on support organizations, but when a customer has a support issue, it would be easier if the support processes were a little bit more automated. It would be beneficial to have an easier way to upload diagnostic dump files. They can make it easy for the customer to collect the diagnostic data. There can be some kind of monitoring solutions to alert users to issues with the appliance or software, making it easy for customers to monitor their systems in the field. This is especially critical because it stores customers' backups, and a failure can have significant business impacts. If a customer does not have the backups and has a disaster, they can be out of business, so monitoring is key.

Read full review

Quotes from Members

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

Pros

"The tool's most valuable features are data warehousing, speedy recovery, and analytics. Its latest release is cost-effective."

"We have integrated it with VMware. The integration process is pretty good. Especially with VMware, it helps with the capacity of it."

"Among its most appealing features are its ease of handling and minimal maintenance requirements."

"I would rate Pure Storage FlashBlade a ten out of ten."

"It performs well and it is also very fast."

"We can capacity plan at a greater level than we used to."

"It's very easy-to-use."

"The solution is able to handle workloads and is easy to use. It allows us to actually manage the boxes in less time."

More Pure Storage FlashBlade pros

"The best thing is that it works. We don't have to maintain it too much; we usually upgrade once a year."

"The guaranteed performance, combined with the scalability through its scale-out capability, makes it an excellent choice."

"Dell has the AI to protect the EMA."

"Our users are able to easily roll back snapshots without going through IT."

"My experience with Dell as a vendor is pretty good; they are probably one of the best in the industry."

"There are also the policies that you set up on replication and purging files, and policies for something called WORM. That's a "write once, read many," where you can't overwrite certain files or certain data. It puts them in a "protected mode" where it becomes very difficult for someone to accidentally delete. We use that for certain files or certain directories, because we're dealing with video and some video has to be protected for chain-of-custody purposes. The WORM feature works great."

"Based on the flexibility of the system itself, it was easy for us to manage the growth by buying individual nodes as needed."

"The most valuable feature of the solution is the unlimited scalability. The tool has high availability and high storage capacity."

More Dell PowerScale (Isilon) pros

"We need revisions and safe backup so that it could be held up in court, but deduplication and compression are the main features why we have Quest QoreStor. That's where it really shines. I use ZFS and XFS at home, and Quest QoreStor is even better."

"Quest QoreStor definitely saved us money."

"Data deduplication and replication would be the top two features. The encryption and cloud tiering are also attractive for the future."

"The extreme compression of data is a big thing for us. We were looking for an online backup solution, and QoreStor is very good in terms of data compression. It helps us minimize the required storage in the Blob Storage environment."

"I would rate QoreStor a ten out of ten for what it offers for the price."

"This software solution can be installed on many different types of hardware, which makes it very flexible. We can run it on virtual machines or virtual servers, providing convenience for solutions of varying sizes, from small to large."

"It integrates with various backup software solutions, which makes it compatible with existing backup workflows and processes."

"QoreStor has helped us to reduce our backup storage requirements on-premises. We've been using the same devices for quite a while, and so it lets us keep using them as opposed to having to rip out all that hardware and create a new on-prem solution. The advantage here is even if we had to retire the hardware tomorrow, the QoreStor part doesn't change. We just have to have additional hardware and put the solution back on whatever hardware we pick and it'll do the same thing."

More QoreStor pros

Cons

"In terms of technical support, the experience has been mixed. The support is done through email and is not that great, making it a very problematic area I've been dealing with for over four years."

"An area for improvement in Pure Storage FlashBlade is its price. It could be reduced. The technical support for Pure Storage FlashBlade also needs improvement. It used to be good, with more experienced engineers. Nowadays, it isn't, and it takes longer for support to solve problems."

"It would be beneficial if the layer could support the S3 protocol and be container ready in the next release."

"I would like to have Snapshots and Snapmail in the next release. People who came from a NetApp background, especially expect these features."

"In terms of scalability, it doesn't expand out quite as robustly as some of the others, but it covers 90% of the market in what it does."

"To improve FlashBlade, some analysts suggest enhancing its handling of relational database management systems and SQL queries."

"Recently, while upgrading the version code, one of the controllers failed. Replacing the controller took between 14 to 20 days."

"Pure Storage FlashBlade should improve on more cloud integration."

More Pure Storage FlashBlade cons

"We see room for improvement in Dell PowerScale (Isilon) because we need personnel to effectively utilize all our infrastructure; it's not easy to find skilled people to work on AI and data analysis."

"Dell PowerScale's deployment is not easy."

"The hardest challenge we have is due to how we've bought things over time. The way that we moved to the PowerEdge platform for the newer systems creates a scale problem as I still buy the older style systems, which are more dense storage."

"Isilon has limitations on the number of files that can be generated."

"Data storage performance needs to be improved."

"Dell PowerScale (Isilon) is a little bit pricey, and its pricing could be improved."

"The solution’s interface and pricing could be improved."

"Dell PowerScale can improve on its multi-tenant part because as a service provider, we have bigger clusters in data centers where we can serve multiple customers and grant them dedicated management points and automation features that can be managed in a multi-tenant environment."

More Dell PowerScale (Isilon) cons

"The installation could use improvement. The initial installation was a little touchy and it's not really user-installable. You have to have a connection to support to install."

"The ransomware protection of QoreStor could use improvement."

"Support is one point of improvement for Quest QoreStor. Support is sometimes not adequate."

"There can be some kind of monitoring solutions to alert users to issues with the appliance or software, making it easy for customers to monitor their systems in the field."

"They need to increase their maximum capacity. Other than that, they're doing a pretty good job."

"Overall, I am happy with this solution, but a way to export configuration settings would be beneficial."

"They could improve on support a little bit. We have not had to engage their support much, but when we do have issues, it can take longer to get things resolved."

"The importance of support is significant to me. I was working for a service provider, and all of our customers had a Quest or warning. Sometimes the support really underperforms."

More QoreStor cons

Pricing and Cost Advice

"We used a reseller for the purchase."

"Licensing fees are paid yearly."

"Support is a separate line item. Support is a different cost, but whatever your support is now, that's what you're going to pay forever. If your support's $100 today, six years from now it's $100. It doesn't fluctuate unless you upgrade it, or change it, etc."

"The price of this solution could be made more affordable."

"The pricing for FlashBlade is between cheap and moderate."

"Our customers have seen a reduction in TCO."

"It is within reason for what you get. From what we have found comparing it to other vendors, it is in the same range as others. Given the choice, we would definitely redeploy it based on the cost."

"I understand that it is competitively priced compared to other brands."

More Pure Storage FlashBlade pricing and cost advice

"The general cost for a system like this is expensive. The total cost depends on your use case. You need to pay for every additional feature that you use."

"Our company finds the pricing high, but it decreases over time."

"The pricing is excellent."

"The price of the solution is high."

"I always want things to be less expensive. However, I would say the pricing is fair. Their costs are in alignment with their competitors. It is a good value for the money."

"Dealing with the product costs and licensing areas is getting easier since Dell is simplifying the licensing process and licensing packages offered to users."

"The platform is not cheap. However, on the software side, you can choose what you want license. So, you can start your licensing with the features that you need, then after buying the platform add some other features."

"The only drawback for us is that it's a large upfront investment. This was a huge decision for a startup company to make. It took a bit for us to get over the line on it, but we have not regretted it."

More Dell PowerScale (Isilon) pricing and cost advice

"Its pricing model is very attractive. You have one price, and you get everything from QoreStor."

"Quest QoreStor's pricing is affordable. We evaluated Veeam, a well-known company for backup solutions, but found their pricing to be quite high. Veeam's price was almost double. For us, Quest QoreStor is very affordable."

"The cost is per terabyte, and overall, the cost was reasonable when compared to some competitors."

"The pricing is good. It is competitive for a managed services provider. I like the ability to pay by the terabyte, allowing for an incremental cost that we and our customers can afford, so the solution grows with the customer."

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Top Industries

By visitors reading reviews

Computer Software Company

12%

Financial Services Firm

12%

Manufacturing Company

Government

Computer Software Company

13%

Manufacturing Company

10%

Financial Services Firm

Healthcare Company

Performing Arts

15%

Computer Software Company

10%

Real Estate/Law Firm

Manufacturing Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	11
Midsize Enterprise	11
Large Enterprise	20

By reviewers
Company Size	Count
Small Business	16
Midsize Enterprise	17
Large Enterprise	36

By reviewers
Company Size	Count
Small Business	5
Midsize Enterprise	1
Large Enterprise	2

Questions from the Community

What do you like most about Pure Storage FlashBlade?

The tool's most valuable feature is its fast performance, especially in handling snapshots. It helps during power out...

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What is your experience regarding pricing and costs for Pure Storage FlashBlade?

The pricing of Pure Storage FlashBlade is expensive compared to other products I used from other companies in the pas...

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What needs improvement with Pure Storage FlashBlade?

I believe there is not much improvement needed because they have everything we need, but the interface is a little bi...

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What do you like most about Dell EMC PowerScale (Isilon)?

The solution provides massive performance, scalability, efficiency, and ease of management.

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What is your experience regarding pricing and costs for Dell EMC PowerScale (Isilon)?

It's considered between mid and high-end regarding. Dell usually knows how to position each model. If the customer wa...

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What needs improvement with Dell EMC PowerScale (Isilon)?

With every iteration of the OneFS system, new features are being added, and the UI is being updated here and there. S...

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What else besides data replication does QoreStor offer?

Quest QoreStor can be used for multiple things besides data replication. For example, it can be trusted to make a bac...

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How does Quest QoreStore protect your data?

One of our favorite features of Quest QoreStore for data protection isn't the backup, actually, though we're using it...

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How does Quest QoreStore solve repetitive data replicas?

When I first found out about data replication and the many benefits it had, I couldn't help but wonder - what about t...

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Comparisons

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Compared 8% of the time

Dell ObjectScale vs Pure Storage FlashBlade

Compared 5% of the time

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Compared 16% of the time

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Compared 9% of the time

Qumulo vs Dell PowerScale (Isilon)

Compared 8% of the time

HPE StoreEasy vs Dell PowerScale (Isilon)

Compared 6% of the time

VAST Data vs Dell PowerScale (Isilon)

Compared 6% of the time

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Dell PowerProtect DD (Data Domain) vs QoreStor

Compared 100% of the time

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Product Reports

Buyer's Guide

Pure Storage FlashBlade

September 2025

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Buyer's Guide

Dell PowerScale (Isilon)

September 2025

Download Dell PowerScale (Isilon) product report

Buyer's Guide

QoreStor

September 2025

Download QoreStor product report

Also Known As

No data available

PowerScale, Dell EMC Isilon

QoreStor

Overview

FlashBlade is the industry’s most advanced scale-out storage for unstructured data, powered by a modern, massively parallel architecture to consolidate complex data silos (like backup appliances and data lakes) and accelerate tomorrow’s discoveries and insights.

Pure Storage

Dell PowerScale leads in unstructured data management with unified file and object storage, massive scalability, security, and cloud adaptability, enhancing AI, analytics, and enterprise applications with exceptional performance and resilience.

Dell PowerScale Isilon provides a comprehensive platform for unstructured data, excelling in scalability, management, and performance. With features like single-pane management, SyncIQ, and SmartQuotas, it handles large datasets with flexibility and robust security. Its multi-protocol support and seamless expansion improve operational efficiency. While it offers strong data protection, enhancements in cloud integration, cybersecurity, and performance are sought. Users note potential for cost reductions and streamlined configurations and mention desired improvements in object storage handling and NFS support.

What are the key features of Dell PowerScale Isilon?

Single-pane management: Simplifies data control and monitoring through a unified interface.
SyncIQ: Ensures efficient data replication for business continuity.
SmartQuotas: Provides intelligent quota management for optimized storage allocation.
Multi-protocol support: Facilitates cross-platform data access and integration.
Seamless storage expansion: Allows effortless scaling to accommodate growing data needs.

What benefits should users consider when reviewing Dell PowerScale Isilon?

Operational efficiency: Reduces workload with easy management and automation.
Enhanced security: Offers comprehensive data protection and recovery options.
Scalability: Supports large-scale data storage with flexible growth capabilities.
Performance: Delivers high-speed data processing for demanding applications.
Integration flexibility: Adapts to on-prem and hybrid cloud environments for diverse deployment needs.

Organizations across industries utilize Dell PowerScale Isilon for large-scale unstructured storage, supporting applications like video archiving, genomic data storage, and high-resolution imaging. Educational institutions, research centers, and media enterprises rely on its scaled-out storage capabilities, providing centralized, secure storage for diverse applications in hybrid, cloud, and on-prem environments.

Dell Technologies

QoreStor optimizes storage costs through advanced deduplication and compression, seamlessly integrating with backup infrastructures and supporting diverse hardware. It enhances data security with replication and offers flexible deployment with minimal maintenance.

QoreStor offers significant benefits in deduplication, which leads to space savings and reduced storage expenses. This system integrates effortlessly with backup platforms like NetVault and Veeam, functioning as a reliable backup target for both on-premises and cloud environments. The ease of integration is complemented by its replication capabilities, which add a layer of data security by enabling geographically dispersed backups. Its cloud tiering functionality extends storage capabilities, ensuring cost-effectiveness compared to other solutions. While enhancements are needed in areas like Cloud Tier support, Air Gap features, and GUI intuitiveness, the continued developments aim to further optimize storage and backup solutions.

What are QoreStor's key features?

Deduplication and Compression: Achieves high deduplication rates and space savings.
Seamless Integration: Works well with diverse backup infrastructures.
Replication: Facilitates data security through multi-location backups.
Cloud Tiering: Extends storage capabilities efficiently.
Minimal Maintenance: Requires low maintenance efforts.

What benefits should be considered in user reviews?

Cost-Effectiveness: Offers competitive pricing and optimized storage.
Storage Optimization: Reduces storage needs with advanced data handling.
Flexibility: Supports diverse hardware and deployment options.
Data Security: Enhances protection with robust replication features.

QoreStor is widely implemented in industries for backup and restore operations, providing data deduplication and compression as key functionalities. Its integration as a backup target across platforms like NetVault and Veeam makes it ideal for enterprises that require efficient data management and storage cost control. Many organizations utilize its features to optimize cloud storage seamlessly while focusing on internal data handling or acting as service resellers.

Quest Software

Sample Customers

ServiceNow, Mercedes-AMG Petronas Motorsport, Dominos, Man AHL

OMRF, University of Utah, Translational Genetics Research Institute, Arcis, Geofizyka Torumn, Cyprus E&P Corporation, Colburn School, Columbia Sportswear, Harvard Medical School, University of Michigan, National Library of France,

American Airlines, at&t, Bank of America. Barclays, ebay, Ford

Buyer's Guide

Dell PowerScale (Isilon) vs. QoreStor

July 2025

Free Report: Dell PowerScale (Isilon) vs. QoreStor

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