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HPE StoreOnce vs Sepaton DeltaStor comparison

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Executive Summary

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

HPE StoreOnce
Ranking in Deduplication Software
3rd
Average Rating
8.4
Reviews Sentiment
7.2
Number of Reviews
108
Ranking in other categories
Disk Based Backup Systems (2nd)
Sepaton DeltaStor
Ranking in Deduplication Software
16th
Average Rating
0.0
Number of Reviews
0
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2026, in the Deduplication Software category, the mindshare of HPE StoreOnce is 16.6%, down from 18.6% compared to the previous year. The mindshare of Sepaton DeltaStor is 1.4%, up from 0.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Deduplication Software Mindshare Distribution
ProductMindshare (%)
HPE StoreOnce16.6%
Sepaton DeltaStor1.4%
Other82.0%
Deduplication Software
 

Featured Reviews

NW
HPE Product Manager at a tech services company with 51-200 employees
Collaborate effectively with partners and benefit from robust data management capabilities
The functions of HPE StoreOnce that I find most valuable are its deduplication and replication options. These features save data and reduce the size of data significantly. If the actual size for backup data is 100 terabytes, using StoreOnce, it will be around less than 10% of the original size due to the 1 to 10 deduplication ratio. So, compression and replication are critical features I appreciate. Additionally, adaptive backup and restore capabilities of HPE StoreOnce are indeed very helpful functions. As I know from my technical team, the process is very easy for end users because the GUI and user experience with StoreOnce are straightforward. They can restore their backups at any time. An important feature of StoreOnce is that they can reserve an amount of storage capacity as protected capacity for a limited time, safeguarding their data against intrusion and other interactions. Based on feedback from customers, StoreOnce is regarded as a highly useful solution for backup. I am satisfied with the security aspects of HPE StoreOnce, but it's crucial for any company to maintain a multi-layer security approach. Starting with a firewall is essential for maintaining their environment. Additionally, security features on StoreOnce are useful. I believe that no company should rely solely on one layer of security; they should adopt a multi-layer security strategy that begins at the network level and extends to their internal solutions.
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Top Industries

By visitors reading reviews
Outsourcing Company
10%
Manufacturing Company
9%
Financial Services Firm
9%
Construction Company
8%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business38
Midsize Enterprise30
Large Enterprise51
No data available
 

Questions from the Community

What needs improvement with HPE StoreOnce?
To improve HPE StoreOnce, I think if HPE generates new models with lower capacities than 80 terabytes, it would be beneficial for the market. We face a significant issue with the current offerings....
What is your primary use case for HPE StoreOnce?
The main use case for HPE StoreOnce is that it serves as an appliance storage for backup and archiving. StoreOnce incorporates deduplication and replication, achieving a ratio that arrives at 1 to ...
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Also Known As

HP StoreOnce
DeltaStor
 

Overview

 

Sample Customers

Eurobank Serbia
Ballast Nedam, BMW, COIG, Sealed Air, Secode, Shaanxi Telecom, Silesian University of Technology, Spoleto Municipality, St. Martinus Hospital, T-Hrvatski Telekom
Find out what your peers are saying about Dell Technologies, Hewlett Packard Enterprise, NetApp and others in Deduplication Software. Updated: September 2026.
913,683 professionals have used our research since 2012.