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Illumio vs VMware NSX vs Zscaler Internet Access comparison

 

Comparison Buyer's Guide

Executive Summary

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
Illumio is praised for its cost-effectiveness, operational value, East-West traffic visibility, and time-saving benefits.
Sentiment score
6.4
VMware NSX offers long-term financial benefits by reducing overhead and improving security, despite high initial costs and evaluation time.
Sentiment score
5.7
Zscaler Internet Access drives cost savings by reducing on-premises needs, enhancing security, and cutting hardware and staffing costs.
I observe extensive return on investment with Illumio.
Senior Security Consultant at Orange Cyberdefense
Illumio is known to be the cheapest solution among the security solutions we evaluated.
IT Specialist at Allianz
The managed service aspect of Zscaler Internet Access has allowed for reduced staffing costs, resulting in a saving of approximately 20-25% compared to prior expenses.
Sr. Cloud Security Architect at a tech services company with 11-50 employees
 

Customer Service

Sentiment score
1.0
Illumio's customer support is generally satisfactory with 24/7 availability, though some report delays and varying helpfulness levels.
Sentiment score
6.6
VMware NSX support is knowledgeable but experiences vary; some report delays and recent service deterioration due to structural changes.
Sentiment score
6.5
Zscaler Internet Access customer service is responsive and knowledgeable, with high ratings but occasional scheduling and resource issues.
Even if we raise an issue on non-working days like Saturdays or Sundays, we receive prompt responses.
IT Specialist at Allianz
From my experience, they are very responsive.
Technical Associate at a healthcare company with 11-50 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
The technical support for Zscaler Internet Access is rated around seven out of ten due to some response time issues and the engagement model.
Sr. Cloud Security Architect at a tech services company with 11-50 employees
Zscaler Internet Access customer service is really very good.
Product Owner at a financial services firm with 501-1,000 employees
I find customer support to be quite adequate
Group IT Manager at a wholesaler/distributor with 10,001+ employees
 

Scalability Issues

Sentiment score
6.5
Illumio excels in scalability, supporting cloud expansions and large installations, receiving positive ratings from diverse users and teams.
Sentiment score
7.6
VMware NSX is favored for its scalability, supporting extensive deployments across data centers with ease and efficiency.
Sentiment score
7.2
Zscaler Internet Access offers scalable cloud solutions for easy expansion, with some challenges in cost, bandwidth, and deployment complexity.
Scaling it to a large level is not an issue for us.
Cyber Security Architect at a tech vendor with 10,001+ employees
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
With the pricing structure that they currently have, it is only for big customers.
Product Owner at a financial services firm with 501-1,000 employees
I find Zscaler Internet Access to be highly scalable, which was one of the reasons for choosing it.
Group IT Manager at a wholesaler/distributor with 10,001+ employees
Zscaler Internet Access is scalable and has points of presence across the globe to ensure low latency and reliable connections.
Sr. Cloud Security Architect at a tech services company with 11-50 employees
 

Stability Issues

Sentiment score
7.7
Illumio is considered stable and reliable, with users praising its SaaS option and rating stability 8.5 out of 10.
Sentiment score
8.1
VMware NSX is praised for its high stability and reliability, with most users rating it 8-10 out of 10.
Sentiment score
7.4
Zscaler Internet Access is globally stable and secure, with minor regional latency issues, and straightforward deployment praised by users.
Illumio is a stable solution with no glitches or bugs reported, making it a reliable product for us.
IT Specialist at Allianz
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
Zscaler Internet Access is stable and capable of building resilient architectures.
Sr. Cloud Security Architect at a tech services company with 11-50 employees
Zscaler Internet Access is very stable, and I would rate its stability as nine out of ten.
Group IT Manager at a wholesaler/distributor with 10,001+ employees
 

Room For Improvement

Illumio requires better support, integration, security, and flexibility, with improved upgrades, visibility, and interactive tech sessions for users.
VMware NSX struggles with high costs, complex configurations, integration issues, and requires improvements in scalability, user-friendliness, and pricing.
Zscaler Internet Access needs improved integration, reporting, user interface, support, pricing, scalability, and feature enhancements for better overall performance.
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
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
The response time and engagement model for technical support could be improved to handle complex outages more efficiently.
Sr. Cloud Security Architect at a tech services company with 11-50 employees
In future updates, I would like to see some of the features bundled into the existing product set, perhaps more AI features and a refreshed interface.
Cyber Security Architect at a manufacturing company with 1,001-5,000 employees
Zscaler Internet Access has introduced AI control for tools such as ChatGPT, providing options to restrict to text-only input without file or image uploads through CASB restriction controls.
Associate Vice President at Novac Technology Solutions
 

Setup Cost

Illumio's pricing is competitive and flexible, varying by workload and duration, appealing to enterprises over traditional firewalls.
VMware NSX pricing is seen as high; costs vary based on features used, licensing choices, and negotiation effectiveness.
Zscaler Internet Access pricing is high, with a per-user model, making it cost-effective yet potentially inaccessible for small businesses.
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
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
Zscaler Internet Access is recognized as an expensive solution.
Group IT Manager at a wholesaler/distributor with 10,001+ employees
Zscaler Internet Access is less expensive than competitors like Palo Alto, offering a premium service justified by security enhancements and cost-effective scalability.
Sr. Cloud Security Architect at a tech services company with 11-50 employees
Of course, it is an expensive product.
Product Owner at a financial services firm with 501-1,000 employees
 

Valuable Features

Illumio enhances security and operational efficiency with centralized rule management, traffic analysis, and secure micro-segmentation features.
VMware NSX offers micro-segmentation, scalability, automation, VM-level security, and Zero Trust support for enhanced modern networking.
Zscaler Internet Access enhances security with URL filtering, SSL inspection, threat protection, and seamless remote management, improving efficiency globally.
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
The dependency map is the most valuable aspect.
Technical Associate at a healthcare company with 11-50 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
It prevents numerous web attacks through its AI/ML incorporated capability which identifies malware, threats, and viruses.
Associate Vice President at Novac Technology Solutions
Zscaler Internet Access has positively impacted my organization by reducing the dependency on on-premises hardware and improving security posture, enabling faster user onboarding, and providing better performance for remote users.
Senior Network Engineer at Anthology
The most valuable feature for me is the ability to see how my network and traffic looks with modules like analytics and insights.
Group IT Manager at a wholesaler/distributor with 10,001+ employees
 

Mindshare comparison

Cloud and Data Center Security Mindshare Distribution
ProductMindshare (%)
Illumio18.4%
Akamai Guardicore Segmentation17.6%
Cisco Secure Workload10.7%
Other53.3%
Cloud and Data Center Security
Network Virtualization Mindshare Distribution
ProductMindshare (%)
VMware NSX33.0%
Cisco ACI35.2%
Cisco Elastic Services Controller9.4%
Other22.39999999999999%
Network Virtualization
Secure Web Gateways (SWG) Mindshare Distribution
ProductMindshare (%)
Zscaler Internet Access12.1%
Cisco Umbrella12.8%
Prisma Access by Palo Alto Networks8.8%
Other66.3%
Secure Web Gateways (SWG)
 

Featured Reviews

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.
TAIYAB HASAN - PeerSpot reviewer
Windows Redhat Linux Vmware & Azure & Cloud & Nutanix Ahv-Vmware & Backup Senior System Administrator at AlDawaa Medical Services
Has improved network visibility and security through micro-segmentation and SDN capabilities
This feature gives us flexibility and allows us to manage everything under one pane. We can see everything on one console, including network operations and behavior. Monitoring and security are among the best features for VMware NSX. For micro-segmentation, it's integrated with our endpoint security. If there are any issues with servers or VMs, it notifies us so we can isolate the servers and investigate. It provides distributed security features such as firewall and intrusion, IDS, IPS. The security level with IPS and IDS in VMware NSX is excellent. It also provides logical switching and routing which gives an extra layer for Layer 2 and Layer 3 switching requirements. The solution provides flexibility, automation, and self-service capabilities, resulting in cost savings as extensive expertise isn't required. Once automation and self-service are implemented, many tasks can be completed automatically. Load balancing is another excellent feature. Multiple servers can run on load balancing features, which is particularly useful since we have many application servers running. Sharing loads between servers provides the best performance.
Mohan Janarthanan - PeerSpot reviewer
Associate Vice President at Novac Technology Solutions
User access management and threat prevention are enhanced with user-friendly controls
The best features Zscaler Internet Access offers include application control, tenant segregation, and PoP center regions which have low availability zones. The internet access is very successful and bandwidth speed is excellent. It also has application-based control, URL-based control, and SSL inspection capabilities, which are very useful. Additionally, the in-depth CASB segregation is very beneficial to us. One unique feature I found helpful is the tenant level restrictions, which we use to only access our organization's tenant level mail IDs, drives, and specific tenant level access while restricting public access. Zscaler Internet Access has positively impacted our organization as we have noticed substantial outputs and income. It has improved our security environment control and endpoint protection. It prevents numerous web attacks through its AI/ML incorporated capability which identifies malware, threats, and viruses. It has a toggle button to enable features entirely at the tenant level for all users onboarded into Zscaler Internet Access, resulting in much better outcomes.
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Top Industries

By visitors reading reviews
Financial Services Firm
17%
Computer Software Company
11%
Manufacturing Company
8%
Insurance Company
6%
Financial Services Firm
11%
Computer Software Company
10%
Manufacturing Company
10%
Government
8%
Computer Software Company
12%
Manufacturing Company
10%
Financial Services Firm
10%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise1
Large Enterprise9
By reviewers
Company SizeCount
Small Business34
Midsize Enterprise23
Large Enterprise69
By reviewers
Company SizeCount
Small Business17
Midsize Enterprise10
Large Enterprise37
 

Questions from the Community

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 tha...
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...
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 ...
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 g...
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 wh...
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 ...
Which is the better security solution - Cisco Umbrella or Zscaler?
Cisco Umbrella and Zscaler Internet Access are two broad-spectrum Internet security solutions that I have tried. Zs...
Which is better, Zscaler internet access or Netsckope CASB?
We researched Netskope but ultimately chose Zscaler. Netskope is a cloud access security broker that helps identify ...
What is your experience regarding pricing and costs for Zscaler Internet Access?
It is only for big companies currently and they only focus on that. That is one of the problems to get into the marke...
 

Also Known As

Illumio Adaptive Security Platform, Illumio ASP
VMware Nicira, Lastline Defender
ZIA
 

Overview

 

Sample Customers

Plantronics, NTT Innovation Institute Inc.
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
Ulster-Greene ARC, BanRegio, HDFC, Ralcorp Holdings Inc., British American Tobacco, Med America Billing Services Inc., Lanco Group, Aquafil, Telefonica, Swisscom, Brigade Group
Find out what your peers are saying about Akamai, Broadcom, SentinelOne and others in Cloud and Data Center Security. Updated: March 2026.
885,667 professionals have used our research since 2012.