IBM Spectrum Scale vs QoreStor comparison

IBM and Quest Software are both solutions in the Software Defined Storage (SDS) category. IBM is ranked #10 with an average rating of 9.0, while Quest Software is ranked #23 with an average rating of 7.0. IBM holds a 4.5% mindshare in SDS, compared to Quest Software’s 0.1% mindshare. Additionally, 100% of IBM 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

IBM Spectrum Scale and QoreStor offer storage management solutions. IBM Spectrum Scale is ideal for large-scale storage systems, while QoreStor is preferred for its de-duplication and cost-efficiency.

Features:IBM Spectrum Scale provides high performance, scalability, and data management across multiple locations. QoreStor specializes in data deduplication, cloud integration, and enhanced backup and recovery, focusing on storage optimization.

Room for Improvement:IBM Spectrum Scale can improve its complexity during deployment, maintain usability for smaller environments, and enhance integration with non-IBM platforms. QoreStor could benefit from integrating advanced security features, improving cloud-tiering options, and refining its user interface for more seamless operations.

Ease of Deployment and Customer Service:IBM Spectrum Scale presents a complex deployment process but offers extensive documentation and professional support. QoreStor allows straightforward deployment, ease of integration, and focuses on personalized customer service, making it more attractive for user-friendly experiences.

Pricing and ROI:IBM Spectrum Scale requires a significant initial investment, justified by long-term ROI in large environments. QoreStor offers budget-friendly setup costs and emphasizes lower ongoing expenses with competitive ROI through powerful data efficiency and reduced storage expenses.

To learn more, read our detailed IBM Spectrum Scale vs. QoreStor Report (Updated: July 2025).

Buyer's Guide

IBM Spectrum Scale 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 August 2025, in the Software Defined Storage (SDS) category, the mindshare of Pure Storage FlashBlade is 4.4%, up from 4.4% compared to the previous year. The mindshare of IBM Spectrum Scale is 4.5%, down from 5.0% compared to the previous year. The mindshare of QoreStor is 0.1%. It is calculated based on PeerSpot user engagement data.

Software Defined Storage (SDS)

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.

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Bernd Stroehle.

Enterprise Architect at kosakya

Deliver improved performance in data processing and foster extensive AI initiatives

I find IBM Spectrum Scale to be an excellent product known for its fast parallel file system. It achieved the best results when integrated with IBM hardware. Even though it is complex, it provided significant performance advantages in large-scale data management. Its fault tolerance mechanisms and integration capabilities make it popular for extensive AI initiatives and data processing tasks for organizations like Daimler Benz and Bosch.

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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.

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Quotes from Members

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

Pros

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

"The main feature I have found to be product replication."

"The most valuable features of FlashBlade include its replication capabilities, reports, and easy allocation. Everything is user-friendly."

"It has also helped to simplify storage for us in the way that it's easy to manage. Their automatic monitoring really helps when things break or are about to break. They see a problem coming and alert us even before our own system does."

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

"The onboarding and integrated monitoring tools are pretty good."

"The most valuable features include the ease of implementation, ease of use and the speed that you can do backup and recovery on."

"What I like best about Pure Storage FlashBlade is its object storage functionality, plus it has fast underlying hardware. Pure Storage FlashBlade is also very stable. I find its stability one of its valuable features."

More Pure Storage FlashBlade pros

"GPFS monitoring is the best feature."

"I find IBM Spectrum Scale to be an excellent product known for its fast parallel file system."

"We are using it for monitoring all of our storage."

"It is a scalable solution."

"I rate this product ten out of ten."

"Its great servicing high availability. That is what it is used for."

"The profile share is a valuable feature."

"It makes our file system sharing a lot easier, even across different continents. We have had file systems shared across different continents with no performance degradation."

More IBM Spectrum Scale pros

"Quest QoreStor definitely saved us money."

"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."

"Deduplication is the most valuable feature. It saves us a lot of space. When we back up 100 terabytes of data, after dedupe, it only uses maybe five to six terabytes for the disk space in QoreStor."

"The dedupe and compression are pretty extreme. On disk, we're getting dedupe rates of up to 65 percent of data and compression of 34 percent. When you go to the cloud, it's more like 76 percent for dedupe and almost 50 percent for compression."

"Quest QoreStor is very stable compared to our previous solution."

"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."

"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."

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

More QoreStor pros

Cons

"I would like to see more deduplication."

"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."

"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."

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

"In the realm of micro-services, I think that Pure Storage can do well if they start getting in there and making their arrays more micro-services ready."

"There is some room for new features related to authentication and integration with Kubernetes, and other solution using S3 Bucket."

"I would like to see the licensing fees improved as well as the price per terabytes."

"The documentational aspect of FlashBlade needs improvement."

More Pure Storage FlashBlade cons

"Integration with other vendors is not available."

"The main issue that we have now is with the encryption. They want to use more metrics in encryption, which is not working very well."

"I wish there were some graphical user interface to access the GPFS file system creation and monitoring."

"This is probably the biggest challenge, getting everything upgraded, because it just takes time. We wish it was a faster solution to be able to do everything at once, but you have do each node individually. The more nodes, the longer it takes."

"Making it a little easier to add bad file sets would help. There is a transition to how you add storage and how you add a file set, so making that a little smoother would probably be my recommendation."

"There can be improvements in fault tolerance and making erasure coding faster."

"They should probably simply the Red Hat implementation portion. This portion was not as straightforward as I would like it to be."

"The initial setup is complex, especially if trying to avoid erasure coding, as it requires more discs. Avoiding erasure coding can significantly increase costs."

More IBM Spectrum Scale cons

"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."

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

"In terms of improvement, we would like to have an Air Gap feature to prevent a virus from attaching to something. So that when we don't do a backup, we want the QoreStor to stay offline. It would be a nice feature to have."

"The setup of the software is definitely not the easiest thing. I worked a lot with Quest engineers, especially in the early days when we were first testing it and trying it out. I actually had some of the developers working with us at one point because they were going through these point releases, and I was having trouble getting it to work in this S3-compatible situation. We got it all working eventually, but setup is definitely not the easiest thing in the world."

"The ransomware protection of QoreStor could use improvement."

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

"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 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

"The price is a little high."

"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."

"Pure Storage FlashBlade is a hardware appliance, and it's very expensive if you compare its price with other solutions. You can get the same features and benefits from its competitor, VAST Data, but for half the price of Pure Storage FlashBlade."

"In my opinion, we have paid the right price for the product. I don't think that it is too much or too little."

"I rate the tool's pricing a seven to eight out of ten."

"I have seen ROI. It has allowed me to increase the density of my VMs without having to purchase anything additional."

"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."

More Pure Storage FlashBlade pricing and cost advice

"The licensing is based on the number of terabytes."

"The solution is costly but reliable."

"The licensing model is complex and depends on factors such as the number of processing cores and the amount of storage."

"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."

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

"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."

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Top Industries

By visitors reading reviews

Computer Software Company

13%

Financial Services Firm

12%

Manufacturing Company

10%

Government

Financial Services Firm

20%

Manufacturing Company

11%

Computer Software Company

11%

Educational Organization

Performing Arts

11%

Computer Software Company

Manufacturing Company

Educational Organization

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

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 is your experience regarding pricing and costs for IBM Spectrum Scale?

IBM Spectrum Scale is very expensive with complex pricing models usually based on the amount of storage used or the n...

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What needs improvement with IBM Spectrum Scale?

There is room for improvement in the web interface. There could be more information available, such as charts and gra...

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What is your primary use case for IBM Spectrum Scale?

My personal use of this product is for parallel writing or reading files.

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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

Dell PowerScale (Isilon) vs Pure Storage FlashBlade

Compared 19% of the time

MinIO vs Pure Storage FlashBlade

Compared 10% of the time

Red Hat Ceph Storage vs Pure Storage FlashBlade

Compared 10% of the time

Pure Storage FlashArray vs Pure Storage FlashBlade

Compared 10% of the time

VAST Data vs Pure Storage FlashBlade

Compared 9% of the time

More Pure Storage FlashBlade Competitors

Red Hat Ceph Storage vs IBM Spectrum Scale

Compared 22% of the time

DDN IME vs IBM Spectrum Scale

Compared 12% of the time

Portworx Enterprise vs IBM Spectrum Scale

Compared 11% of the time

Red Hat Gluster Storage vs IBM Spectrum Scale

Compared 9% of the time

VMware vSAN vs IBM Spectrum Scale

Compared 7% of the time

More IBM Spectrum Scale Competitors

Dell PowerProtect DD (Data Domain) vs QoreStor

Compared 100% of the time

More QoreStor Competitors

Product Reports

Buyer's Guide

Pure Storage FlashBlade

August 2025

Download Pure Storage FlashBlade product report

Buyer's Guide

IBM Spectrum Scale

August 2025

Download IBM Spectrum Scale product report

Buyer's Guide

QoreStor

August 2025

Download QoreStor product report

Also Known As

No data available

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

IBM Spectrum Scale is a cluster file system that provides concurrent access to a single file system or set of file systems from multiple nodes. The nodes can be SAN attached, network attached, a mixture of SAN attached and network attached, or in a shared nothing cluster configuration. This enables access to this common set of data to support a scale-out solution or to provide a high availability platform. IBM Spectrum Scale has many features beyond common data access including data replication, policy based storage management, and multi-site operations. You can create a cluster of AIX nodes, Linux nodes, Windows server nodes, or a mix of all three. IBM Spectrum Scale can run on virtualized instances providing common data access in environments, leverage logical partitioning, or other hypervisors. Multiple IBM Spectrum Scale clusters can share data within a location or across wide area network (WAN) connections.

IBM

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

Information Not Available

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

Buyer's Guide

IBM Spectrum Scale vs. QoreStor

July 2025

Free Report: IBM Spectrum Scale vs. QoreStor

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