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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
9th
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 May 2026, in the Blade Servers category, the mindshare of Cisco UCS B-Series is 7.3%, down from 8.8% compared to the previous year. The mindshare of Lenovo Flex System is 4.5%, up from 3.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Blade Servers Mindshare Distribution
ProductMindshare (%)
Cisco UCS B-Series7.3%
Lenovo Flex System4.5%
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

"It is a very robust and reliable solution."
"Cisco UCS B-Series is more scalable because of the blade servers."
"Some of the features I like from this solution are it has a fast configuration, it is not complex, and has high availability."
"The product's tech support has good people."
"The most valuable feature is the service profiles."
"The Dashboard is quite impressive and is, so far, the best based on my experience."
"The most valuable feature is definitely the service profile."
"The platform has valuable features for management and good monitoring tools. It provides efficient insights."
"I have found the solution to be quite stable."
"The functionality is reliable and requires minimal support."
"The product is very user-friendly and has many resources at the enterprise level."
"The Lenovo Flex System is very stable."
"It's stable, it works well, and we have had no problem with it for a long time."
"I'd recommend Flex System to others as it's much better than any other product we've had and advise that they use XClarity for system management."
"One of the most valuable features of this solution is its ease of use."
"The most valuable feature of the Lenovo Flex System is the storage system."
 

Cons

"There are some shortcomings in the product when you look at it from the perspective of the area involving multiple configurations, making it an aspect where improvements are required."
"Very tightly integrated, so once you are all in, you are likely to be there for a long time."
"From my point of view the initial cost to do this for a small regional office where we usually have the computer in a dedicated network closet for the switches and servers."
"These are not stable servers because we have seen some cases where the servers have gone down when there were power fluctuations."
"The license is expensive. Cisco should decrease the delay in the delivery of their products."
"The server system can be very daunting for an untrained system administrator to configure."
"We have to have Java to manage the infrastructure. It would be great if we can manage the infrastructure through a web browser."
"Its scalability could be better."
"The installation was not easy."
"The most valuable feature of the Lenovo Flex System is the storage system."
"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."
"Flex System's integration with the XClarity Management System could be improved."
"The solution's firmware and driver upgrades are a bit difficult."
"I had some difficulties with the initial setup."
"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."
 

Pricing and Cost Advice

"The cost of the Cisco UCS B-Series is comparable to HP solutions but higher than Dell solutions."
"Make sure you work with a vendor partner than can get you a substantial discount off of list pricing."
"From a business point of view, the price is on the higher end."
"Pricing will be based on your requirements so it is important to plan, engage, and negotiate directly with the Cisco Account Manager."
"Compared to the more in-demand hyper-converged environments such as Nutanix or DVX rail, Cisco UCS B-Series is even more costly due to the expensive fabric interconnects."
"The product is expensive."
"The product cost is high."
"Cisco UCS B-Series is an expensive solution."
"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."
"The price is interesting. I am able to quote a client based on their needs and offer them either Lenovo or Dell."
"There is a one-off payment to buy the equipment and the support is purchased annually."
"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."
"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."
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Top Industries

By visitors reading reviews
Financial Services Firm
13%
Marketing Services Firm
11%
Construction Company
9%
Performing Arts
8%
Financial Services Firm
13%
Construction Company
13%
Manufacturing Company
11%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business21
Midsize Enterprise15
Large Enterprise41
By reviewers
Company SizeCount
Small Business3
Large Enterprise7
 

Questions from the Community

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 primary use case for Cisco UCS B-Series?
The Cisco UCS B-Series servers are used to run backend databases ranging from small, medium, to large, running different versions of RDBMS such as Oracle, SQL, MySQL. It also includes cloud databas...
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: April 2026.
893,244 professionals have used our research since 2012.