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Nexsan Unity vs VAST Data 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

Pure FlashArray X NVMe
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Ranking in NVMe All-Flash Storage Arrays
6th
Average Rating
9.0
Reviews Sentiment
6.7
Number of Reviews
36
Ranking in other categories
All-Flash Storage (14th)
Nexsan Unity
Ranking in NVMe All-Flash Storage Arrays
27th
Average Rating
0.0
Number of Reviews
0
Ranking in other categories
No ranking in other categories
VAST Data
Ranking in NVMe All-Flash Storage Arrays
11th
Average Rating
10.0
Reviews Sentiment
7.5
Number of Reviews
2
Ranking in other categories
All-Flash Storage (32nd), File and Object Storage (18th)
 

Mindshare comparison

As of July 2025, in the NVMe All-Flash Storage Arrays category, the mindshare of Pure FlashArray X NVMe is 2.7%, down from 2.7% compared to the previous year. The mindshare of Nexsan Unity is 0.2%, down from 0.3% compared to the previous year. The mindshare of VAST Data is 6.1%, down from 6.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
NVMe All-Flash Storage Arrays
 

Featured Reviews

Jaehoon Oh - PeerSpot reviewer
Supports efficient storage management through volume snapshots and offers reliable non-disruptive upgrades
I have no specific improvements to suggest for Pure FlashArray X NVMe at this time. The performance statistics could be enhanced. I can see the performance statistics in the Pure Storage console, but it does not show the performance by 4K byte unit. It displays IOPS and bandwidth, but IOPS is about real use, and I want to know how many IOPS are currently running in 4K byte units. I cannot see that IOPS because most storage systems report their performance by 4K byte unit. I want to see Pure Storage performance by 4K byte unit to compare with other storage or other internal NVMe SSD.
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Alan Powers - PeerSpot reviewer
Stability-wise, a device that has been up and running for years
The failover capability and resiliency are some of the solution's valuable features. The big thing is resilience because it has richer coding in it, so multiple devices can't fail. Also, one can still access a number of CBoxes that can allow one to access their file system. Once a device fails, it fails the transparency of the end-user, and it just starts using another resource. The encryption capability, the snapshots, along with a whole bunch of features make the tool valuable. VAST Data keeps adding more and more features all the time.
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Financial Services Firm
11%
Manufacturing Company
11%
Government
6%
No data available
Computer Software Company
15%
Manufacturing Company
13%
Financial Services Firm
13%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Questions from the Community

What do you like most about Pure FlashArray X NVMe?
Pure FlashArray X NVMe helps to improve our processing speed. It is user-friendly and easy to use.
What needs improvement with Pure FlashArray X NVMe?
Adding some functions to the product would be beneficial. Storage replication should be essential, and the analytics ...
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Can you provide any information you may have on VAST Data?
Here are some technical details about VAST Data: VAST Data is a software-defined storage platform designed to scale...
 

Also Known As

Pure FlashArray//X NVMe, Pure FlashArray//X, FlashArray//X
No data available
No data available
 

Overview

 

Sample Customers

Fremont Bank, Judson ISD, The Nielsen Company
Information Not Available
Norwest Venture Partners, General Dynamics Information Technology, Ginkgo Bioworks
Find out what your peers are saying about Dell Technologies, NetApp, Nutanix and others in NVMe All-Flash Storage Arrays. Updated: June 2025.
861,803 professionals have used our research since 2012.