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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 September 2026, in the Blade Servers category, the mindshare of Cisco UCS B-Series is 7.5%, down from 7.6% compared to the previous year. The mindshare of Lenovo Flex System is 4.4%, 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-Series7.5%
Lenovo Flex System4.4%
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

"The most beneficial feature is UCS Manager. It's the best way to manage hardware, creating group policies, like scrub policies and maintenance policies."
"The solution is stable...The solution is scalable."
"The UCS B-Series is easy to scale; we have approximately 1,000 people using this solution, and it is used on a daily basis."
"Cisco UCS changed the server blade game, converging network and compute into a single profile-based platform."
"The most valuable feature is the ability to replace a server with another one, simply by applying the profile."
"From a return on investment perspective, Cisco UCS B-Series is worth the money."
"The scalability, high availability, and security all combined is a good offering."
"Some of the features I like from this solution are it has a fast configuration, it is not complex, and has high availability."
"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 product is very user-friendly and has many resources at the enterprise level."
"The functionality is reliable and requires minimal support."
"The initial setup is straightforward."
"The Lenovo Flex System is very stable."
"The most valuable feature of the Lenovo Flex System is the storage system."
"I have found the solution to be quite stable."
 

Cons

"Cisco TAC has been phenomenal in most cases, but we have had a couple of minor instances where the issue took a bit longer than it should have to be resolved."
"The UCS manager interface needs to be cleaned up a bit and can be streamlined, but no major complaints."
"The pricing could be improved, as it is a bit expensive solution."
"Cooling. It is hotter than HP blade servers."
"There are patches that cannot be implemented without any downtime or reboot required."
"Cisco UCS B-Series competitors have similar features as they do, Cisco needs to make some changes to make their offering better."
"We have to have Java to manage the infrastructure. It would be great if we can manage the infrastructure through a web browser."
"The monitoring features and integration with other products can be improved. In particular, integration with other products is difficult, especially for logging purposes."
"Forced restarts due to free upgrades is an issue that needs to be resolved. We can manage this as we have high availability and redundancy, but without that it could be a real problem."
"The installation was not easy."
"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."
"Flex System's integration with the XClarity Management System could be improved."
"The product could improve its integration capabilities."
"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 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."
 

Pricing and Cost Advice

"Make sure you work with a vendor partner than can get you a substantial discount off of list pricing."
"The cost of the Cisco UCS B-Series is comparable to HP solutions but higher than Dell solutions."
"The type of service level purchase will determine the level of support response that you receive from Cisco."
"Cisco UCS B-Series is an expensive solution."
"The product cost is high."
"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."
"It is expensive."
"We are just paying the operational cost, which is not much."
"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."
"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."
"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."
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Top Industries

By visitors reading reviews
Construction Company
14%
Outsourcing Company
13%
Financial Services Firm
10%
Marketing Services Firm
9%
Construction Company
15%
Financial Services Firm
12%
Manufacturing Company
11%
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.
914,109 professionals have used our research since 2012.