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Cisco ACI vs Illumio comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 2, 2025

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
6.4
Entities report time and cost savings with Cisco ACI, despite challenges in implementation and varied financial benefit assessments.
Sentiment score
7.4
Illumio provides East-West traffic visibility and log auditing, offering substantial value with cost-effectiveness and time efficiencies despite incomplete data.
Efficient utilization leads to cost savings and efficiency gains.
Sr Consultant at Tata Consultancy
Illumio is known to be the cheapest solution among the security solutions we evaluated.
Senior Technical Analyst at Allianz
 

Customer Service

Sentiment score
7.1
Cisco ACI support is praised for responsiveness and resolution speed, but inconsistencies exist, especially with newer staff and regions.
Sentiment score
1.0
Illumio's customer service is generally responsive with 24/7 availability, but experiences and satisfaction vary among users.
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
Even if we raise an issue on non-working days like Saturdays or Sundays, we receive prompt responses.
Senior Technical Analyst at Allianz
From my experience, they are very responsive.
Technical Associate at a healthcare company with 11-50 employees
 

Scalability Issues

Sentiment score
7.6
Cisco ACI offers excellent scalability, enabling easy network expansion and integration, while supporting extensive device numbers and multi-site setups.
Sentiment score
7.6
Illumio effortlessly scales in large installations, supports diverse environments, and receives high user satisfaction across various professional roles.
Expanding your network or your data center with Cisco ACI is not an issue; scalability is a good feature.
Network Technical Manager at KPMG
The scalability of Cisco ACI supports our organization's growth effectively.
Sr Consultant at Tata Consultancy
The solution offers high performance and scalability with connectivity options up to 100 GS.
Chief Technology Officer at Mehbub General Trading PLC
Scaling it to a large level is not an issue for us.
Cyber Security Architect at a tech vendor with 10,001+ employees
 

Stability Issues

Sentiment score
7.5
Cisco ACI is stable and reliable, with resolved bugs and improved support, offering minimal downtime despite occasional minor issues.
Sentiment score
8.0
Illumio is praised for stability and reliability, using native firewalls with high user satisfaction and an 8.5 rating.
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
Illumio is a stable solution with no glitches or bugs reported, making it a reliable product for us.
Senior Technical Analyst at Allianz
 

Room For Improvement

Cisco ACI needs user interface, configuration, integration, and support improvements to enhance usability and scalability in hybrid environments.
Illumio needs improved support, integration, OS compatibility, data security, detailed logs, interactive sessions, and tagging automation guidance.
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
Their lack of on-ground offices can result in business losses.
Chief Technology Officer at Mehbub General Trading PLC
There could also be more examples of how the automations can be done using Illumio.
Cyber Security Architect at a tech vendor with 10,001+ employees
That's why I'm looking for comparisons with other products.
Technical Associate at a healthcare company with 11-50 employees
There should be an option to upgrade from the console to the latest version instead of performing manual upgrades.
Senior Technical Analyst at Allianz
 

Setup Cost

Cisco ACI is costly but valuable, offering quality and support; best for large operations despite complex licensing.
Illumio offers flexible pricing based on workloads, with mixed views on cost, subscribing every three years.
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
Cost is one thing that could be improved, as it is heavy for an emerging market like ours.
S VP, IT Infra at ATOM
I know that Illumio is the cheapest solution in the security area.
Senior Technical Analyst at Allianz
I think it's not very expensive if we compare it with Guardicore.
Cyber Security Architect at a tech vendor with 10,001+ employees
 

Valuable Features

Cisco ACI enhances data center efficiency with seamless integration, automation, scalability, micro-segmentation, robust security, and user-friendly management.
Illumio enhances security and usability with its Application Dependency Map, traffic analysis, and centralized policy management, aiding visibility and micro-segmentation.
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
The current tool is adequate for day-to-day operations, but we want to explore more on AI Ops and hope future versions of OpenText can support that.
S VP, IT Infra at ATOM
It is essential for growing our data center connectivity and enablement for our customers.
Sr Consultant at Tata Consultancy
Illumio helps in audit purposes by saving data and showing blocked traffic, ensuring no outside traffic is allowed.
Senior Technical Analyst at Allianz
The most important feature is the traffic review analysis, where we use the draft view and the reported view that helps us understand how the application interacts with other applications in the environment, and based on that, we are able to define the policies.
Cyber Security Architect at a tech vendor with 10,001+ employees
The dependency map is the most valuable aspect.
Technical Associate at a healthcare company with 11-50 employees
 

Categories and Ranking

Cisco ACI
Ranking in Cloud and Data Center Security
7th
Average Rating
8.0
Reviews Sentiment
6.3
Number of Reviews
103
Ranking in other categories
Network Virtualization (1st), Software Defined Networking (SDN) (2nd)
Illumio
Ranking in Cloud and Data Center Security
6th
Average Rating
8.2
Reviews Sentiment
5.7
Number of Reviews
12
Ranking in other categories
Cloud Workload Protection Platforms (CWPP) (13th), Microsegmentation Software (2nd)
 

Mindshare comparison

As of January 2026, in the Cloud and Data Center Security category, the mindshare of Cisco ACI is 4.2%, down from 6.1% compared to the previous year. The mindshare of Illumio is 19.5%, down from 25.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Cloud and Data Center Security Market Share Distribution
ProductMarket Share (%)
Illumio19.5%
Cisco ACI4.2%
Other76.3%
Cloud and Data Center Security
 

Featured Reviews

Rahul Khandelwal - PeerSpot reviewer
Network Technical Manager at KPMG
Enables streamlined data center management with automation and application-centric design
The main features of Cisco ACI that I really appreciate are the application-centric and network-centric designs, allowing you to create your network according to your application. That's helpful, and it's good for one-time implementation. The automation capabilities are really helpful. We deployed one data center using Terraform, and after deployment, many automation features are available, which can be very helpful. Based on my experience, 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. Many organizations are actually using the old traditional Nexus infrastructure or some old data center devices. It gives you significant control and one-time implementation capabilities, and it also provides better performance and security. Functionality-wise, Cisco ACI provides integration using automation. We implemented it through Terraform, which was easy. Those features are available, so I don't think any new features are needed right now; something new could come up, but they have implemented many improvements over the years.
US
Cyber Security Architect at a tech vendor with 10,001+ employees
Have created granular security policies based on roles and application behavior
The best feature that Illumio offers is that we can easily understand how to label the applications, how to install Illumio agent on the client machines, how to install the agent on the servers, and how to do the ring-fencing. The log analysis is very simple, and we can map the traffic very easily, such as the traffic view and map view. We have many views to do that, and then we have a topology environment where we can expand the topology and understand how we want to prepare our policy based on the requirement. These are some of the very good use cases that Illumio provides, which none of the other vendors can offer in such an easy and usable way. The most important feature is the traffic review analysis, where we use the draft view and the reported view that helps us understand how the application interacts with other applications in the environment, and based on that, we are able to define the policies. It has increased the business for the organization. We are creating business by supporting the client. The client is getting more security and is more confident in their network because they now have the micro-segmentation feature in their environment. This is new technology and that's how it helps the organization as a whole. The clients we support are benefited, and at the same time, we are making money out of it. This is definitely a good approach. After implementing Illumio, there has been significant progress. Most of the app owners now understand what applications are communicating, how these applications interact with others, and we are more aware of which application is talking to what other servers and applications, and their roles. For instance, whether an application is talking to the DB server or an app server. We have a more granular understanding of the traffic view. Additionally, after implementing Illumio, there is greater segmentation, and fewer incidents are occurring. There have been times when an attack was halted from expanding laterally.
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Top Industries

By visitors reading reviews
Computer Software Company
13%
Financial Services Firm
12%
Manufacturing Company
9%
Healthcare Company
7%
Financial Services Firm
18%
Computer Software Company
12%
Manufacturing Company
8%
Insurance Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business21
Midsize Enterprise19
Large Enterprise87
By reviewers
Company SizeCount
Small Business3
Midsize Enterprise1
Large Enterprise8
 

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 do you like most about Cisco ACI?
The flexibility of adding new components with minimal impact on existing services running in the data center is a key benefit of this ACI-based solution.
What is your experience regarding pricing and costs for Illumio Adaptive Security Platform?
My experience was really good because I think it's not very expensive if we compare it with Guardicore. I believe that's a good product.
What needs improvement with Illumio Adaptive Security Platform?
Illumio can be improved if we have more interactive sessions with the tech team. The support of Illumio can be better since it's a new tool, and people can explore it more. There could also be more...
What is your primary use case for Illumio Adaptive Security Platform?
The main use case for Illumio is providing micro-segmentation where we don't want to segment the network based on IP addresses but rather segment them based on roles, applications, and environments...
 

Comparisons

 

Also Known As

No data available
Illumio Adaptive Security Platform, Illumio ASP
 

Overview

 

Sample Customers

Bowling Green State University, du, Qatar University
Plantronics, NTT Innovation Institute Inc.
Find out what your peers are saying about Cisco ACI vs. Illumio and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.