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Cisco ACI vs VMware NSX comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jun 3, 2026

Review summaries and opinions

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

ROI

Sentiment score
6.0
Cisco ACI enhances efficiency, reduces costs, offers security benefits, and improves adaptability, despite some challenges in quantifying returns.
Sentiment score
6.4
VMware NSX offers long-term financial benefits by reducing overhead and improving security, despite high initial costs and evaluation time.
Efficient utilization leads to cost savings and efficiency gains.
Sr Consultant at Tata Consultancy
 

Customer Service

Sentiment score
7.2
Cisco ACI's customer service sees varying satisfaction, praised for improvements but criticized for inconsistencies and regional disparities.
Sentiment score
6.6
VMware NSX support is knowledgeable but experiences vary; some report delays and recent service deterioration due to structural changes.
The technical support from Cisco is satisfactory.
Sr Consultant at Tata Consultancy
When issues occur, the TAC is not able to provide much support, leading to difficulties in finding RCAs.
Network Technical Manager at KPMG
Cisco has a Customer Experience team and other professional services coming in, so their support seems to be good.
Consulting & Solution Integration at a comms service provider with 10,001+ employees
They were always helpful.
Senior VMware Administrator at Johnson Controls, Inc.
They are quick and understand things easily, so the support is aligned very effectively.
Windows Redhat Linux Vmware & Azure & Cloud & Nutanix Ahv-Vmware & Backup Senior System Administrator at AlDawaa Medical Services
Our technicians have a good support experience from the company.
Joint Staff Officer at Hellenic National Defence General Staff
 

Scalability Issues

Sentiment score
7.7
Cisco ACI offers excellent scalability, easing expansion and integration across environments, with a flexible architecture supporting growth and multi-site setups.
Sentiment score
7.6
VMware NSX is favored for its scalability, supporting extensive deployments across data centers with ease and efficiency.
The solution offers high performance and scalability with connectivity options up to 100 GS.
Chief Technology Officer at Mehbub General Trading PLC
The scalability of Cisco ACI supports our organization's growth effectively.
Sr Consultant at Tata Consultancy
Expanding your network or your data center with Cisco ACI is not an issue; scalability is a good feature.
Network Technical Manager at KPMG
There is a high level of satisfaction with its ability to scale.
Senior IT Strategy Consultant at a financial services firm with 1,001-5,000 employees
 

Stability Issues

Sentiment score
7.5
Cisco ACI is highly stable and reliable, with most users rating its performance between eight and ten.
Sentiment score
8.1
VMware NSX is praised for its high stability and reliability, with most users rating it 8-10 out of 10.
For stability, Cisco ACI rates a nine or 9.5 because I've seen three customers using Cisco ACI and once deployed, the solution is very stable.
Network Technical Manager at KPMG
Cisco ACI is stable in my experience.
Senior Network Automation Engineer at a outsourcing company with 1,001-5,000 employees
The product performs at 99% efficiency without any showstoppers or significant issues.
Windows Redhat Linux Vmware & Azure & Cloud & Nutanix Ahv-Vmware & Backup Senior System Administrator at AlDawaa Medical Services
For stability, I would rate VMware NSX as a nine out of ten.
Services Presales Solutions Architecture - UAE & Gulf at a tech vendor with 10,001+ employees
 

Room For Improvement

Cisco ACI struggles with complexity, user-friendliness, cloud integration, security, cost, and support, hindering customer adoption and satisfaction.
VMware NSX struggles with high costs, complex configurations, integration issues, and requires improvements in scalability, user-friendliness, and pricing.
What we need is something called RAG, or retrieval-augmented generation. If Cisco can implement that to utilize customer-specific data instead of general knowledge, while ensuring data privacy under GDPR laws, I think that will result in very good, reliable output.
Senior Network Automation Engineer at a outsourcing company with 1,001-5,000 employees
Their lack of on-ground offices can result in business losses.
Chief Technology Officer at Mehbub General Trading PLC
We do not make use of its visibility and analytics features, as we are mostly using it for the networking part only.
S VP, IT Infra at ATOM
The initial configuration and integration within our existing environment were not easy.
Senior IT Strategy Consultant at a financial services firm with 1,001-5,000 employees
The pricing for the product is another area for improvement as I'm not satisfied nowadays.
Senior VMware Administrator at Johnson Controls, Inc.
The licensing model is expensive and could be more flexible, especially after Broadcom bought VMware.
Services Presales Solutions Architecture - UAE & Gulf at a tech vendor with 10,001+ employees
 

Setup Cost

Cisco ACI is costly but valued for reliability, with discounts for partners, justifying the investment in uninterrupted operations.
VMware NSX pricing is seen as high; costs vary based on features used, licensing choices, and negotiation effectiveness.
In general, Cisco ACI is on the higher side; it's not a cheap solution.
Network Technical Manager at KPMG
Cisco's pricing tends to be on the higher end compared to other vendors.
Chief Technology Officer at Mehbub General Trading PLC
Regarding pricing, setup costs, and licensing for Cisco ACI, I observe that it is on the more expensive side.
Senior Systems Engineer at a outsourcing company with 51-200 employees
The cost of VMware NSX is considered high.
Senior IT Strategy Consultant at a financial services firm with 1,001-5,000 employees
The complexity is too high in terms of price.
Technical Manager at Allianz Cloud Private Limited
VMware NSX is a little higher in price compared to the competition.
Joint Staff Officer at Hellenic National Defence General Staff
 

Valuable Features

Cisco ACI offers efficient traffic management, robust automation, centralized control, and enhanced security with seamless API-driven operational efficiency.
VMware NSX offers micro-segmentation, scalability, automation, VM-level security, and Zero Trust support for enhanced modern networking.
Cisco ACI provides substantial capability; you can design your network accordingly and it's part of the SDN family, providing many benefits to the organization, especially when moving from traditional network infrastructure.
Network Technical Manager at KPMG
Instead of taking days or multiple days for a deployment of a server or application, they can do it immediately within minutes because all the configuration templates are already there in the control plane.
Consulting & Solution Integration at a comms service provider with 10,001+ employees
With the Cisco ACI fabric, you manage them as a whole, and it's an automation-driven solution, with our network development team integrating with the APIs to establish workflows for observability, fault alerts, monitoring, and more.
Senior Network Automation Engineer at a outsourcing company with 1,001-5,000 employees
Micro-segmentation enhances security and provides more secure data in your data center.
Services Presales Solutions Architecture - UAE & Gulf at a tech vendor with 10,001+ employees
Consistent networking and security policies across different environments have a major and very positive impact on our business operations, allowing us to achieve the security posture we want with compliance and regulations.
Technical Manager at Allianz Cloud Private Limited
The most powerful feature of VMware NSX is the micro-segmentation that allows us to separate the different protocols our application works with.
Joint Staff Officer at Hellenic National Defence General Staff
 

Categories and Ranking

Cisco ACI
Ranking in Network Virtualization
1st
Ranking in Cloud and Data Center Security
7th
Average Rating
8.0
Reviews Sentiment
6.1
Number of Reviews
106
Ranking in other categories
Software Defined Networking (SDN) (2nd)
VMware NSX
Ranking in Network Virtualization
2nd
Ranking in Cloud and Data Center Security
5th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
107
Ranking in other categories
Network Traffic Analysis (NTA) (7th), Network Detection and Response (NDR) (8th), Network Automation (5th), Microsegmentation Software (3rd)
 

Mindshare comparison

As of November 2026, in the Network Virtualization category, the mindshare of Cisco ACI is 25.0%, down from 41.0% compared to the previous year. The mindshare of VMware NSX is 27.3%, down from 37.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Virtualization Mindshare Distribution
ProductMindshare (%)
Cisco ACI25.0%
VMware NSX27.3%
Other47.7%
Network Virtualization
 

Featured Reviews

Sulaiman Olubiyi - PeerSpot reviewer
Senior Network Automation Engineer at a outsourcing company with 1,001-5,000 employees
Network automation has simplified secure multi-site connectivity and reduced daily operational effort
I believe Cisco ACI could improve by incorporating something related to agentic AI, where it can execute tasks based on particular evaluations or loop engineering, enhancing fault identification or suggestions based on each tenant's configuration. Additionally, I think they should ensure that the documentation is comprehensive. I appreciate that Cisco provides documentation, and their support engineers are helpful in case of any issues. In terms of governance and security regarding Cisco ACI's AI capabilities, I think what we call evals or evaluations is important, whereby the engineer can evaluate the functionalities of the AI in Cisco ACI, preventing it from making deletions or modifications on its own. Therefore, there should be evaluations or guardrails incorporated into the development capabilities. Regarding accuracy and reliability of output for Cisco ACI's AI capabilities, it hasn't met my expectations. What we need is something called RAG, or retrieval-augmented generation. If Cisco can implement that to utilize customer-specific data instead of general knowledge, while ensuring data privacy under GDPR laws, I think that will result in very good, reliable output.
Mahesh Bhadoriya - PeerSpot reviewer
Technical Manager at Allianz Cloud Private Limited
Micro segmentation has strengthened zero trust security and isolates production from test environments
The advantages of VMware NSX include its micro-segmentation for internal security at the firewall and VM levels, which is very powerful and helps us comply with complete Zero Trust security models. We are able to achieve this and configure network level virtualization with no dependency on VLANs. Micro-segmentation helps improve our security significantly. We are not totally dependent upon our physical upfront firewall, and it makes sense to configure everything using VMware NSX, leading to multiple improvements in our organization. We moved from traditional networking such as VLANs from the firewall and switches to VMware NSX segmentation. We achieve one firewall per VLAN and can stop lateral movement such as ransomware control. The Zero Trust model is the main functionality and architecture it offers, allowing application isolation, such as having a separate production and test environment. Consistent networking and security policies across different environments have a major and very positive impact on our business operations, allowing us to achieve the security posture we want with compliance and regulations.
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Answers from the Community

MB
Works at LIMU
Nov 8, 2021
Nov 8, 2021
Once you know your way around the Cisco ecosystem, using Cisco ACI is not so difficult. It is a global product, so when you change one interface, changes are automatically reflected on every switch. Cisco ACI can connect with both virtualized networks and physical networks. As with many Cisco solutions, Cisco ACI has a steep learning curve. It is not user-friendly and most of our team would lik...
See 2 answers
SB
Senior Infrastructure Engineer at a retailer with 10,001+ employees
Jun 9, 2021
There are some very major differences between both the Products and to name a few. -Cisco ACI have physical network gear (9K Switches) where the Code runs in ACI Policy Mode & the UCS server where APIC software runs. -VMware NSX doesn't have any physical network gear of its own, VMware NSX software runs on ESXi hosts(Any Vendor) & even NSX Bare Metal Edge runs on any Vendor hardware(check compatibility) -Cisco ACI offers both Underlay & Overlay functionality -VMware NSX is a software and it builds an Overlay tunnel for (VM/Container) communication on top of an already established IP network which can be build on hardware network gear (Cisco Legacy/ACI/Juniper etc.) -Cisco ACI: To use micro-segmentation on a VM or Container level you will need some other Cisco products -VMware NSX: Micro-segmentation can be done Out of the Box because DFW Distributed Firewall are applied on the vnic of a VM i.e. on the ESXi kernel. Being different in many manners but they still define the SDN realm with L2-L7 Network services and what you choose over the other may depend on many other factors like what network gear you already have or if its Green or Brownfield deployment. For example if your infra already have something other than Cisco 9K switches and is well configured then it will make more sense to use NSX to make use of all the SDN functionalities. This is just an example not a recommendation.
Nov 8, 2021
Once you know your way around the Cisco ecosystem, using Cisco ACI is not so difficult. It is a global product, so when you change one interface, changes are automatically reflected on every switch. Cisco ACI can connect with both virtualized networks and physical networks. As with many Cisco solutions, Cisco ACI has a steep learning curve. It is not user-friendly and most of our team would like to see a better GUI. It would be great if we could test upgrades in a simulation before implementing; this could save a lot of rework and downtime. The key component for us with VMware NSX is the distributed firewall. VMware NSX can segment every application and server based on the ports with which they need to communicate. We can activate the ports we need and disable the ones we don’t. This really helps to keep things very secure and makes VMware NSX very flexible. We would like to see VMware NSX integrate better with other open-source solutions; integration can be very complex leading many to simply choose not to use VMware NSX at all. We found some maximums can be very limiting, especially with very large environments. VMware can only be used with virtualized networks. Conclusion: Cisco ACI and VMware have many similar qualities and features. The fundamental difference is that Vmware NSX’s primary focus is on virtualized networks, while Cisco ACI can connect to both virtual and physical networks. Vmware NSX can provide better levels of granularity and visibility into how your workload performs and functions. Cisco ACI does not provide this. Because Cisco ACI is more robust and can handle both physical and virtual networks, Cisco ACI might be a more appropriate solution. At the end of the day, it really depends on your organization’s ecosystem and applications, features and utilities needed, and, of course, cost of implementation. You may need one of these solutions or both.
 

Top Industries

By visitors reading reviews
Financial Services Firm
13%
Outsourcing Company
13%
Manufacturing Company
9%
Construction Company
7%
Outsourcing Company
11%
Financial Services Firm
10%
Manufacturing Company
9%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business22
Midsize Enterprise19
Large Enterprise89
By reviewers
Company SizeCount
Small Business34
Midsize Enterprise23
Large Enterprise70
 

Questions from the Community

What are the biggest differences between Cisco ACI and VMware NSX?
There are some very major differences between both the Products and to name a few. -Cisco ACI have physical network gear (9K Switches) where the Code runs in ACI Policy Mode & the UCS server wh...
What are the biggest differences between Cisco ACI and VMware NSX?
Once you know your way around the Cisco ecosystem, using Cisco ACI is not so difficult. It is a global product, so when you change one interface, changes are automatically reflected on every switch...
What is your experience regarding pricing and costs for Cisco ACI?
Cost is one thing that could be improved, as it is heavy for an emerging market like ours.
What is your experience regarding pricing and costs for VMware NSX?
When measuring complexity and costs for our organization, we consider some parameters for effectiveness. In terms of effectiveness in reducing operational complexity, I measure it to be high on the...
What needs improvement with SaltStack SecOps?
Some disadvantages of VMware NSX include a price challenge due to the high licensing cost compared to competitors, and it may sometimes require a specific skill set. We definitely require an experi...
What is your primary use case for SaltStack SecOps?
VMware NSX serves as the primary virtualized networking solution in our hyper-converged infrastructure to provide load balancing between the ESXi hosts and basic security through routing and switch...
 

Also Known As

No data available
VMware Nicira, Lastline Defender
 

Overview

 

Sample Customers

Bowling Green State University, du, Qatar University
City of Avondale, Lumeta, Kroll Ontrack, Heartland Payment Systems, Baystate Heallth, Exostar, Tribune Media, iGATE, NTT Communications, Synergent, California Natural Resources Agency, Bloomington Public Schools, Columbia Sportswear, Join Experience S.A, Schuberg Philis
Find out what your peers are saying about Cisco ACI vs. VMware NSX and other solutions. Updated: September 2026.
920,223 professionals have used our research since 2012.