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Illumio 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:
 

Categories and Ranking

Illumio
Average Rating
8.0
Reviews Sentiment
6.4
Number of Reviews
11
Ranking in other categories
Cloud and Data Center Security (6th), Cloud Workload Protection Platforms (CWPP) (13th), Microsegmentation Software (2nd)
Zscaler Internet Access
Average Rating
8.4
Reviews Sentiment
6.7
Number of Reviews
57
Ranking in other categories
Secure Web Gateways (SWG) (3rd), Internet Security (2nd)
 

Mindshare comparison

While both are Security Software solutions, they serve different purposes. Illumio is designed for Cloud and Data Center Security and holds a mindshare of 22.8%, down 24.1% compared to last year.
Zscaler Internet Access, on the other hand, focuses on Secure Web Gateways (SWG), holds 14.2% mindshare, down 16.8% since last year.
Cloud and Data Center Security Market Share Distribution
ProductMarket Share (%)
Illumio22.8%
Akamai Guardicore Segmentation21.5%
Cisco Secure Workload13.2%
Other42.5%
Cloud and Data Center Security
Secure Web Gateways (SWG) Market Share Distribution
ProductMarket Share (%)
Zscaler Internet Access14.2%
Cisco Umbrella16.9%
Prisma Access by Palo Alto Networks10.8%
Other58.1%
Secure Web Gateways (SWG)
 

Featured Reviews

Alark Singh - PeerSpot reviewer
Visual traffic interface aids in network micro-segmentation while a streamlined update option enhances process efficiency
The strongest aspect of Illumio is the visual traffic interface, which allows us to see all traffic that communicates with our servers and allied companies. We can write rules that can be embedded into the IP table, making it easy to handle. Illumio enables us to see network flows, traffic sources, and destinations. The policy generation and enforcement capabilities are valuable, allowing for selective enforcement. Illumio helps in audit purposes by saving data and showing blocked traffic, ensuring no outside traffic is allowed.
Mohan Janarthanan - PeerSpot reviewer
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.

Quotes from Members

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

Pros

"The tool helps with my company's security posture."
"The solution helps to maintain logs and monitor activities. It also helps us with access management. The tool helps us to secure organizational data that include files."
"The product provides visibility into how the applications communicate and how the network protocols are being used."
"The most valuable feature of Illumio Adaptive Security Platform is monitoring. When I have no requirement from the other application, I can use the web block traffic to build."
"Customer support is excellent."
"The features that I have found most useful is the ability to centralize all the rules and then distribute them across various locations. However, I've encountered challenges related to tagging policies, which can be complex to devise. It's a matter that requires careful consideration and stakeholder involvement before implementing such policies."
"The strongest aspect of Illumio is the visual traffic interface, which allows us to see all traffic that communicates with our servers and allied companies."
"The dependency map is most valuable feature."
"The solution is stable and reliable."
"The solution’s customer service is good."
"The best thing about Zscaler Internet Access is the website filtering. In the UAE it's quite an important feature because most of the malware comes through the SQL injection and through downloads from websites. Zscaler helps protect against that."
"The security is excellent."
"Zscaler Internet Access's roaming user feature is most valuable and is much better compared to other secure web gateways."
"The policies are very intuitive and easy to configure, with very little possibility of messing things up."
"SSL inspection is a valuable feature."
"One feature that is valuable to me from an implementation point of view is that it's very easy to implement."
 

Cons

"The product’s agents don't work very well in OT environments."
"Some of the features that can be improved is offer additional guidance on creating an effective and risk-free tagging policy would be highly beneficial."
"The interaction we've had with the support team hasn't been ideal. Technical support should be improved."
"The solution is very basic and doesn't do anything other than the orchestration of layer four endpoint firewall rules."
"I would like to see better data security in the product."
"Illumio Adaptive Security Platform could improve by supporting more operating systems. For example, Cisco and Apache appliances."
"We need more details on areas where there is an error or a traffic blockage. I would like the tool to offer a more detailed view."
"The customer service is lagging a bit. It could be better."
"The reporting functionality could be a bit easier to use. There is a reporting function, but it's quite hard to do any good reporting, from a user-management perspective. For example, if a department manager wants to know how his department is using the web, there is a way to get the data, but it's quite cumbersome to get it and show it well. And that's true for comparing between departments."
"Technical support could be better."
"The price of the solution could be improved."
"Another thing that I would like to see is if Zscaler could have a separate product for direct access. I looked at a private access solution, but I understand there's a separate product that isn't integrated with this."
"Do not expect to pay for the service and start using it, like Gmail. Zscaler requires a proper implementation to be done to make it successful."
"In terms of usage, here in the GCC, it's still growing a growing market, so the combination of DLP, data leak prevention, to a certain extent is fine. But what it requires is user-based access or role-based access. The solution needs to grow into that, which definitely takes time. There's not an easy way to integrate it, when you have a cloud-based solution."
"I don't know whether it's Zscaler or not, however, sometimes I can't access my time management. I need to wait and try again a few hours later. Typically, if I let some time pass, I can access it again."
"There are some performance issues when we add on additional controls."
 

Pricing and Cost Advice

"The product's pricing is around 10,000-15,000 USD. The pricing is on a yearly basis."
"There is a subscription needed to use Illumio Adaptive Security Platform and we pay every three years. Overall the solution is expensive."
"ZIA follows a subscription model pricing and charges you based on the number of users. I would say its price is good."
"The pricing is an issue. It is expensive compared to other firewalls on the market."
"The tool is moderately priced."
"Zscaler is transparent about its pricing model."
"Price-wise, the tool is reasonable compared to the other products in the market but it is not a very low-priced tool. The solution does provide value for money."
"It is a few pounds per user per month."
"​Be aware that you will need to invest some time and money to adapt your environment for Zscaler (traffic redirection, software deployment, authentication, etc).​"
"We pay around 6,500 INR per user per year, which is very expensive. I would rate Zscaler's pricing one out of five."
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Top Industries

By visitors reading reviews
Financial Services Firm
19%
Computer Software Company
14%
Manufacturing Company
7%
Government
6%
Computer Software Company
15%
Manufacturing Company
11%
Financial Services Firm
10%
Government
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business3
Midsize Enterprise1
Large Enterprise7
By reviewers
Company SizeCount
Small Business15
Midsize Enterprise8
Large Enterprise39
 

Questions from the Community

What do you like most about Illumio Adaptive Security Platform?
The features that I have found most useful is the ability to centralize all the rules and then distribute them across various locations. However, I've encountered challenges related to tagging poli...
What is your experience regarding pricing and costs for Illumio Adaptive Security Platform?
I do not have specific knowledge about pricing details as it is handled by upper management. I know that Illumio is the cheapest solution in the security area.
What needs improvement with Illumio Adaptive Security Platform?
There should be an option to upgrade from the console to the latest version instead of performing manual upgrades. This would be more helpful to streamline processes.
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. Zscaler Internet Access is a good option for carrying out multiple security functi...
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 and manage cloud applications, protecting your sensitive data from exfiltration....
 

Also Known As

Illumio Adaptive Security Platform, Illumio ASP
ZIA
 

Overview

 

Sample Customers

Plantronics, NTT Innovation Institute Inc.
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, SentinelOne, Broadcom and others in Cloud and Data Center Security. Updated: September 2025.
868,787 professionals have used our research since 2012.