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Cisco UCS B-Series vs Lenovo Flex System comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Feb 3, 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

Cisco UCS B-Series
Ranking in Blade Servers
5th
Average Rating
8.6
Reviews Sentiment
6.4
Number of Reviews
74
Ranking in other categories
No ranking in other categories
Lenovo Flex System
Ranking in Blade Servers
8th
Average Rating
8.4
Reviews Sentiment
7.7
Number of Reviews
10
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of March 2026, in the Blade Servers category, the mindshare of Cisco UCS B-Series is 7.2%, down from 8.8% compared to the previous year. The mindshare of Lenovo Flex System is 4.6%, up from 2.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Blade Servers Mindshare Distribution
ProductMindshare (%)
Cisco UCS B-Series7.2%
Lenovo Flex System4.6%
Other88.2%
Blade Servers
 

Featured Reviews

MB
Head of IT Operations at NCC BANK LIMITED
Efficient server management reduces costs and supports seamless operations
Cisco UCS B-Series has reliably sustained smooth operations without the need for significant maintenance. Its administration capabilities provide easy access to performance reports, logs, and utilization data, which are essential for effective server management. Additionally, the integration capabilities are seamless, and the power consumption and heat generation are low, resulting in reduced cooling costs and increased financial benefits.
FA
Senior System Administrator at Khushhali Microfinance Bank
Used to run the compute load on servers, but firmware and driver upgrades are a bit difficult
We use the solution for multiple purposes, such as in the virtualization cluster and the standalone applications We use the solution as a compute model to run the compute load on servers. The solution's firmware and driver upgrades are a bit difficult. I have been using Lenovo Flex System for…

Quotes from Members

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

Pros

"The solution is stable."
"Easy to deploy, scale and expand based on a number of server range available, with centralization for different resources including network, compute and storage."
"Dell has a huge portfolio of products."
"We work with this solution because we find that the technology is superior to others."
"The product's tech support has good people."
"The solution has the ability to reuse or divide the networking, making it a flexible networking environment."
"I like that it's very manageable very easy to use and configure. I am not an expert, but the graphic user interface is quite simple very easy to use. It's a complete solution."
"The stability of Cisco UCS B-Series is impeccable, as it has been running smoothly without any need for maintenance."
"The Lenovo Flex System is very stable."
"We use the solution as a compute model to run the compute load on servers."
"It's stable, it works well, and we have had no problem with it for a long time."
"The stability and speed are always good. The processor is good and it's still working with our loads."
"Flex System's best features are its performance and stability."
"The initial setup is straightforward."
"One of the most valuable features of this solution is its ease of use."
"The functionality is reliable and requires minimal support."
 

Cons

"The solution is expensive."
"Despite the benefits gained from the product implementation, the cost could be more appealing if the overall cost of ownership were reduced."
"There are patches that cannot be implemented without any downtime or reboot required."
"Power Options for setting up Grid needs to have further customization."
"Perfect device, but only if the GUI is made .NET-based, it will be more great."
"I would really like to see an integrated management interface for all the products for FlexPod, as well as a verification tool like Immersive that can give you feedback about your compatibility with FlexPod guidelines."
"Cisco is expensive and difficult to manage. The product is not intuitive. It also needs to improve storage management and upgrades."
"The management interface in the current version is Java based."
"I had some difficulties with the initial setup."
"The product could improve its integration capabilities."
"Flex System's integration with the XClarity Management System could be improved."
"It does not have the same module flexibility that was present in IBM Blade. On the Blade System, I was able to choose between the Cisco module, or BMC module. Since the switch to Lenovo, I have not had the same choice of modules, only the BMC modules."
"The user-interface needs improvement, because they have an application from which we have to manage the whole system and all the infrastructure. This application is not working at our premises, because of some problem with the hardware itself. So although we brought it with our systems, and we used it to manage all the systems: the storage, the switches, and everything, nevertheless we have to support every part alone and enter the interface in one-by-one."
"The solution's firmware and driver upgrades are a bit difficult."
"The user interface needs improvement because they have an application from which we have to manage the whole system and all of the infrastructure."
"The most valuable feature of the Lenovo Flex System is the storage system."
 

Pricing and Cost Advice

"The product cost is high."
"Cisco UCS does not require a license. However, this license is not specific to users."
"The pricing for Cisco products is always high."
"The type of service level purchase will determine the level of support response that you receive from Cisco."
"The cost of the Cisco UCS B-Series is comparable to HP solutions but higher than Dell solutions."
"It makes much more sense for individual licenses for distributed environments"
"This is a premium device and our clients are not as concerned about the reasonableness of the price compared to satisfaction with their productivity."
"Cisco UCS B-Series is an expensive solution."
"The price is interesting. I am able to quote a client based on their needs and offer them either Lenovo or Dell."
"The 14 blade server allows significant room for upscaling before having to invest in another chassis. You would have to purchase another chassis much sooner in the case of an eight or nine blade server."
"The is an annual license cost to use the Lenovo Flex System. If the price was less expensive and flexible overall and for additional features, our customers would be happier."
"We are just paying the operational cost, which is not much."
"We have the whole maintenance for the 3 years, starting the deployment. We also have the VMware license for 3 years and I think we have another license to buy. There are no additional costs besides licensing."
"There is a one-off payment to buy the equipment and the support is purchased annually."
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Top Industries

By visitors reading reviews
Marketing Services Firm
14%
Performing Arts
10%
Manufacturing Company
8%
Financial Services Firm
8%
Manufacturing Company
13%
Financial Services Firm
11%
University
7%
Marketing Services Firm
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise15
Large Enterprise41
By reviewers
Company SizeCount
Small Business3
Large Enterprise7
 

Questions from the Community

What do you like most about Cisco UCS B-Series?
The most valuable feature of the solution stems from the fact that it is easily scalable.
What is your experience regarding pricing and costs for Cisco UCS B-Series?
Comparing Cisco UCS B-Series with traditional servers, while its initial cost may be slightly higher, it is not as expensive as Oracle Exadata, making it a worthwhile investment. It pays off in the...
What needs improvement with Cisco UCS B-Series?
There is a need for Cisco UCS B-Series to evolve and scale vertically, particularly with the increasing data demands and the integration of AI, ensuring the solution remains certified and capable u...
What is your experience regarding pricing and costs for Lenovo Flex System?
Compared to its quality, the pricing is very reasonable and represents good value.
What needs improvement with Lenovo Flex System?
Continuing the production of this product is necessary. It is currently out of support, and we are seeking support from other sources besides Lenovo.
What is your primary use case for Lenovo Flex System?
We are using Lenovo Flex System on the server for our VMware environment, which includes our VMs and all our servers, Linux and Windows. It manages the daily operation efficiently.
 

Also Known As

UCS B-Series, Unified Computing System B-Series
Flex System Blade Servers, Flex System SN Series
 

Overview

 

Sample Customers

Aegean Motorway, Anilana Hotels and Resorts, Anonymous Banking Group, Artoni Transporti, Bellevue, BH Telecom, Bowling Green State University, Children's Hospital Colorado, City of Biel, Dimension Data, Dualtec Cloud Builders, Hertz, Houston Methodist, Kuwait Petroleum Italia, Lufthansa Systems GmbH & Co.KG, Outscale, Sony Corporation, Talbots
Information Not Available
Find out what your peers are saying about Cisco UCS B-Series vs. Lenovo Flex System and other solutions. Updated: March 2026.
884,933 professionals have used our research since 2012.