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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
6th
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 November 2026, in the Blade Servers category, the mindshare of Cisco UCS B-Series is 7.7%, up from 7.1% compared to the previous year. The mindshare of Lenovo Flex System is 4.2%, up from 3.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Blade Servers Mindshare Distribution
ProductMindshare (%)
Cisco UCS B-Series7.7%
Lenovo Flex System4.2%
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.
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

"I can connect Cisco UCS B-Series to multiple chassis and rack servers using a unified platform, then manage them on a single console."
"The scalability, high availability, and security all combined is a good offering."
"The initial setup is pretty simple and straightforward."
"Stability is something I would say is over 90 percent better than most other products."
"Cisco UCS is a fantastic product that is widely deployed with excellent support."
"The solution has the ability to reuse or divide the networking, making it a flexible networking environment."
"It's faster to provision virtual servers than physical, and it has very good orchestration with UCS Director 5.2."
"I have a client who is currently managing 1500 servers with two people for a mission-critical retail operation."
"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."
"The most valuable feature of the Lenovo Flex System is the storage system."
"We are using Lenovo Flex System for our internal platform where we store our operating systems, Windows, Linux, and VMware, and then virtualize our machines."
"Flex System's best features are its performance and stability."
"The initial setup is straightforward."
"We use the solution as a compute model to run the compute load on servers."
"It comes at a good price. We didn't face any problems with this product."
"The functionality is reliable and requires minimal support."
 

Cons

"It needs a better UI. Cisco makes a great product, but doesn't know how to make a UI."
"These are not stable servers because we have seen some cases where the servers have gone down when there were power fluctuations."
"The upgrades could be improved."
"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."
"The license is expensive. Cisco should decrease the delay in the delivery of their products."
"The configuration is a bit complex, as it requires very high technical expertise to apply it."
"The initial setup is not easy."
"Power Options for setting up Grid needs to have further customization."
"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."
"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 solution could improve by providing more integration with other platforms."
"The solution's firmware and driver upgrades are a bit difficult."
"The product could improve its integration capabilities."
"The price of the Lenovo Flex System could improve."
"The user interface needs improvement because they have an application from which we have to manage the whole system and all of the infrastructure."
"I had some difficulties with the initial setup."
 

Pricing and Cost Advice

"From a business point of view, the price is on the higher end."
"Every three years, I need to renew my license and support the product...Every time I have to opt for the renewal of the license, I am shocked to learn about the increase in the price of the product."
"The licensing cost is a little bit expensive because by default, it depends on your fabric interconnect model. Most of the time, however, Cisco provides a lot of promotions to the customers, so the cost can be waived for many projects. The price of the chassis itself is fair."
"Pricing will be based on your requirements so it is important to plan, engage, and negotiate directly with the Cisco Account Manager."
"UCS is expensive, and we will be migrating to the cheaper HP servers."
"The price of this solution is a little bit higher, but given that this system is Cisco, it feels more secure and dependable."
"There is a need to pay towards the licensing costs of the solution on a yearly basis. Price-wise, it is an expensive product"
"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."
"We are just paying the operational cost, which is not much."
"There is a one-off payment to buy the equipment and the support is purchased annually."
"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 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
Construction Company
12%
Outsourcing Company
11%
Financial Services Firm
11%
Marketing Services Firm
8%
Construction Company
14%
Manufacturing Company
11%
Outsourcing Company
9%
Financial Services Firm
9%
 

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: November 2026.
920,939 professionals have used our research since 2012.