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Cisco ACI vs Illumio comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Feb 8, 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
6.4
Entities report time and cost savings with Cisco ACI, despite challenges in implementation and varied financial benefit assessments.
Sentiment score
6.3
Illumio is praised for cost-effectiveness and efficiency, offering comprehensive features that enhance ROI and improve operations.
Efficient utilization leads to cost savings and efficiency gains.
Sr Consultant at Tata Consultancy
I observe extensive return on investment with Illumio.
Senior Security Consultant at Orange Cyberdefense
Illumio serves as a single endpoint technology where I can implement various features, including a zero-trust network, north-to-south and east-to-west configurations, and micro-segmentation, all coming from one platform, which ultimately saves us time and money.
Security Professional at a tech vendor with 10,001+ employees
Illumio definitely demonstrates its value in money-saving capabilities, enhancing our lateral environment inside the organization and providing effectiveness overall once integrated.
Security delivery specialist at a tech vendor with 10,001+ employees
 

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
5.0
Illumio customer service is generally satisfactory but needs improvement in response times and empathy for some 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
Whenever I raise a case with their support team, regardless of the priority level—P1, P2, P3, or P4—they generally reply within an hour
Security Professional at a tech vendor with 10,001+ employees
Even if we raise an issue on non-working days like Saturdays or Sundays, we receive prompt responses.
IT Specialist at Allianz
The customer support is very prominent.
Security delivery specialist at a tech vendor with 10,001+ 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
7.1
Illumio's scalability is praised for ease of expansion, seamless cloud integration, and efficient support for diverse environments and devices.
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
Scaling it to a large level is not an issue for us.
Cyber Security Architect at a tech vendor with 10,001+ employees
By employing Linux scripting or other methods, I can push the policy to all devices at once, making it easy to scale.
Security Professional at a tech vendor with 10,001+ employees
Illumio's scalability is very good; it is quite easy to scale.
Cybersecurity Engineer 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
8.1
Illumio is praised for strong stability, reliability, and effective use of native firewall functions to prevent disruptions.
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.
IT Specialist at Allianz
 

Room For Improvement

Cisco ACI needs user interface, configuration, integration, and support improvements to enhance usability and scalability in hybrid environments.
Illumio users desire better integration, support, and interface, with improved automation, scalability, compatibility, security, and deployment processes.
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
They need to install an agent in the container world, while Akamai Guardicore does not need to install an agent, so they have native support that Illumio lacks.
Senior Security Consultant at Orange Cyberdefense
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
Another improvement might be around scalability, ensuring that as organizations grow, Illumio can handle even larger, more complex environments seamlessly.
DevOps at a marketing services firm with 51-200 employees
 

Setup Cost

Cisco ACI is costly but valuable, offering quality and support; best for large operations despite complex licensing.
Many find Illumio's flexible pricing, despite being costly, offers a good balance of cost and capability compared to competitors.
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.
IT Specialist at Allianz
But when you compare it to firewalls, then it may not be that expensive.
Senior Security Consultant at Orange Cyberdefense
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 offers real-time control, micro-segmentation, and centralized rule management, enhancing security and visibility in dynamic environments.
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
Its features, like easy application deployment, short deployment time for new applications or software, and eliminating the hassle of STP, are appreciated.
Chief Technology Officer at Mehbub General Trading PLC
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.
IT Specialist 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
Illumio is a powerful tool for micro-segmentation and zero trust security that provides strong visibility, flexible policy management, and effective threat containment, enhancing an organization's internal security posture.
Cybersecurity Engineer at a tech vendor with 10,001+ 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
3rd
Average Rating
8.2
Reviews Sentiment
6.0
Number of Reviews
17
Ranking in other categories
Cloud Workload Protection Platforms (CWPP) (11th), Microsegmentation Software (1st)
 

Mindshare comparison

As of May 2026, in the Cloud and Data Center Security category, the mindshare of Cisco ACI is 3.8%, down from 5.7% compared to the previous year. The mindshare of Illumio is 16.1%, down from 25.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Cloud and Data Center Security Mindshare Distribution
ProductMindshare (%)
Illumio16.1%
Cisco ACI3.8%
Other80.1%
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.
Irfan Sharfi - PeerSpot reviewer
Security Professional at a tech vendor with 10,001+ employees
Micro-segmentation has transformed endpoint protection and now isolates internal threats effectively
Illumio can be improved in several areas based on our feedback. Sometimes, the PCE experiences slowness, especially when deploying around 300,000 endpoint devices. When these devices communicate within the network, loading the map or connections can cause latency, which needs improvement for a more user-friendly and faster experience. Regarding improvements to the interface, I believe we can add more features to the graphical user interface, such as proper logs. While the logs currently indicate what was blocked or allowed, clicking on a specific log should provide more information, such as which extra-scope rule is causing a denial, offering better analysis for troubleshooting.
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Top Industries

By visitors reading reviews
Financial Services Firm
15%
Manufacturing Company
9%
Computer Software Company
7%
Comms Service Provider
7%
Financial Services Firm
18%
Computer Software Company
11%
Manufacturing Company
8%
Insurance Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise20
Large Enterprise87
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise1
Large Enterprise12
 

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 Illumio Adaptive Security Platform?
It will be the same price as the Akamai price for Guardicore. It's expensive, that's true. But when you compare it to firewalls, then it may not be that expensive.
What needs improvement with Illumio Adaptive Security Platform?
Illumio does not have much in terms of application dependency mapping features. They lack layer 7 process level segmentation, which is a limitation. In Guardicore, you have the layer 7, the process...
What is your primary use case for Illumio Adaptive Security Platform?
Illumio's use case compared to Akamai is exactly the same. For the purpose of micro-segmentation, it is the same.
 

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: April 2026.
893,438 professionals have used our research since 2012.