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Cisco UCS B-Series vs Lenovo Flex System comparison

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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
4th
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 October 2026, in the Blade Servers category, the mindshare of Cisco UCS B-Series is 7.6%, up from 7.3% compared to the previous year. The mindshare of Lenovo Flex System is 4.3%, up from 3.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Blade Servers Mindshare Distribution
ProductMindshare (%)
Cisco UCS B-Series7.6%
Lenovo Flex System4.3%
Other88.1%
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.
OZ
Head manager at a real estate/law firm with 1,001-5,000 employees
Efficient management with minimal support needs and ongoing production
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 It saves our time because it is stable. The stability is crucial as all operational servers rely on it, making it…

Quotes from Members

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

Pros

"It's modular."
"Combined with Nexus switches, it provides us with a versatile solution for a virtual platform including SAN fabric capability built in, networking flexibility and SDN, and is better to management."
"Faster deployments of new and replacement hardware compact footprint saves valuable space on the rack."
"UCS has made it possible to replace and upgrade servers quickly and easily while keeping things up and running for the enterprise."
"The Dashboard is quite impressive and is, so far, the best based on my experience."
"The most valuable features of the solution are stability and security."
"The product's tech support has good people."
"The scalability and easy management of the lifecycle, upgrades, and hardware failures are valuable."
"It's stable, it works well, and we have had no problem with it for a long time."
"The most valuable feature of the Lenovo Flex System is the storage system."
"It comes at a good price. We didn't face any problems with this product."
"We use the solution as a compute model to run the compute load on servers."
"The initial setup is straightforward."
"The functionality is reliable and requires minimal support."
"One of the most valuable features of this solution is its ease of use."
"Flex System's best features are its performance and stability."
 

Cons

"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 under such conditions."
"The solution’s pricing could be improved and made cheaper."
"This product uses a converged network adapter because it is the only way to provide flexibility with both fiber and ethernet connections."
"Stability of some of the old versions has a few bugs."
"The license is expensive. Cisco should decrease the delay in the delivery of their products."
"Cisco UCS B-Series competitors have similar features as they do, Cisco needs to make some changes to make their offering better."
"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."
"The high price of the solution is an area of concern where improvements are required."
"The installation was not easy."
"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 user interface needs improvement because they have an application from which we have to manage the whole system and all of the infrastructure."
"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."
"Flex System's integration with the XClarity Management System could be improved."
"I had some difficulties with the initial setup."
"The solution's firmware and driver upgrades are a bit difficult."
"Continuing the production of this product is necessary. It is currently out of support, and we are seeking support from other sources besides Lenovo."
 

Pricing and Cost Advice

"A physical licensing fees needs to be paid."
"Considering our market, I rate the pricing of Cisco UCS B-Series as a six."
"UCS is expensive, and we will be migrating to the cheaper HP servers."
"Cisco UCS B-Series is an expensive solution."
"Pricing will be based on your requirements so it is important to plan, engage, and negotiate directly with the Cisco Account Manager."
"The product is expensive."
"This is a premium device and our clients are not as concerned about the reasonableness of the price compared to satisfaction with their productivity."
"Pricing with Cisco is very high."
"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 price is interesting. I am able to quote a client based on their needs and offer them either Lenovo or Dell."
"We are just paying the operational cost, which is not much."
"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 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
Construction Company
13%
Outsourcing Company
12%
Financial Services Firm
11%
Marketing Services Firm
8%
Construction Company
15%
Manufacturing Company
11%
Financial Services Firm
10%
Outsourcing Company
10%
 

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: September 2026.
917,403 professionals have used our research since 2012.