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Dell PowerProtect Data Domain vs Sepaton DeltaStor comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 5, 2025

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

Dell PowerProtect Data Domain
Ranking in Deduplication Software
1st
Average Rating
8.6
Reviews Sentiment
6.7
Number of Reviews
87
Ranking in other categories
Disk Based Backup Systems (1st)
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 January 2026, in the Deduplication Software category, the mindshare of Dell PowerProtect Data Domain is 25.4%, down from 29.2% compared to the previous year. The mindshare of Sepaton DeltaStor is 0.7%, up from 0.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Deduplication Software Market Share Distribution
ProductMarket Share (%)
Dell PowerProtect Data Domain25.4%
Sepaton DeltaStor0.7%
Other73.9%
Deduplication Software
 

Featured Reviews

Branko Cirovic - PeerSpot reviewer
Storage Engineer at Comtrade Group
Provides seamless backup integration and long-term reliability for enterprise data protection
The price is quite high; this product is not considered cheap. Additionally, if you use higher availability boxes, they also come at a premium price. However, they provide business continuity, which is the main reason why companies invest in this solution. Tape is slow; when restoring several virtual machines or databases amounting to several terabytes, Dell PowerProtect Data Domain represents the fastest and most reliable solution, ensuring great integration with backup software. If a customer has limited budget constraints, they may opt for cheaper external storage comprised of just a bunch of disks and utilize it for backup, as backup is not a business-critical service. However, I see great value in Dell PowerProtect Data Domain because it is fully automated, features great integration with backup software, and provides good value for money. I would rate software support as a ten, while I would give hardware support a seven. I never give any product a perfect score; I think Dell PowerProtect Data Domain deserves a nine. The only minor problems are the certificate issue and the price. These certificate issues are quite rare and mainly arise when we forget to restart and upgrade the box for several years.
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Financial Services Firm
10%
Manufacturing Company
10%
Government
7%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business35
Midsize Enterprise23
Large Enterprise38
No data available
 

Questions from the Community

What is your primary use case for Dell EMC PowerProtect DD (Data Domain)?
My use cases for it involve primarily backing up the on-premises servers, and besides that, we also provision CIFS shares and NFS exports on Dell PowerProtect Data Domain.
What do you like most about Dell PowerProtect DD (Data Domain)?
The product, a disk backup solution, improves our data application tasks. We used tape libraries with Dev drives in legacy architectures, resulting in slow backups compared to modern drives like NV...
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Also Known As

DataDomain, Dell EMC Data Domain, PowerProtect Data Domain
DeltaStor
 

Overview

 

Sample Customers

The US Army, City of Houston, Lloyds TSB, TiVo, Teck, Ingram Entertainment, The New York Mets
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: January 2026.
881,082 professionals have used our research since 2012.