Microsoft Defender for Cloud Apps vs Zscaler Internet Access comparison

The compared Microsoft and Zscaler solutions aren't in the same category. Microsoft is ranked #4 in CASB , with an average rating of 8.5, and holds a 6.9% mindshare in the category. Zscaler is ranked #3 in WSG , with an average rating of 8.5, and holds a 13.3% mindshare. Additionally, 100% of Microsoft users are willing to recommend the solution, compared to 98% of Zscaler users who would recommend it.

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Executive SummaryUpdated on Nov 2, 2025

Microsoft Defender for Cloud Apps and Zscaler Internet Access are both market leaders in providing advanced security solutions. Microsoft Defender is well-suited for companies using Microsoft services, whereas Zscaler offers superior threat protection across distributed networks. Zscaler stands out for its advanced threat protection and content filtering capabilities.

Features: Microsoft Defender for Cloud Apps provides strong management features like seamless integration with Microsoft services, identity security posture, and comprehensive visibility across clouds. Zscaler Internet Access offers robust threat detection with SSL inspection, URL filtering, and cloud sandboxing for centralized security management.

Room for Improvement: Microsoft Defender for Cloud Apps could enhance its user interface, integration with Apple products, and reporting capabilities. Zscaler Internet Access faces pricing challenges and integration issues that could affect seamless user experience, along with complexities in IP allocation and firewall dependencies.

Ease of Deployment and Customer Service: Microsoft Defender for Cloud Apps boasts easy deployment in hybrid and public cloud environments, with varying customer service expertise. Zscaler Internet Access is adaptable for various cloud deployments but requires improved localized support and ease of deployment in complex regions like Africa.

Pricing and ROI: Microsoft Defender for Cloud Apps offers cost-effective pricing, especially when bundled with Microsoft E3 or E5 licenses, providing significant ROI with reduced infrastructure needs. Zscaler Internet Access is pricier but offers extensive global coverage and reliable security services, justifying the investment for organizations needing advanced web security and low-latency access.

To learn more, read our detailed Cloud Access Security Brokers (CASB) Report (Updated: January 2026).

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Cloud Access Security Brokers (CASB)

January 2026

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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

iboss

Mindshare comparison

Cloud Access Security Brokers (CASB) Market Share Distribution
Product	Market Share (%)
Microsoft Defender for Cloud Apps	6.9%
Prisma Access by Palo Alto Networks	14.7%
Netskope	14.6%
Other	63.8%

Cloud Access Security Brokers (CASB)

Secure Web Gateways (SWG) Market Share Distribution
Product	Market Share (%)
Zscaler Internet Access	13.3%
Cisco Umbrella	15.1%
Prisma Access by Palo Alto Networks	9.2%
Other	62.400000000000006%

Secure Web Gateways (SWG)

Featured Reviews

reviewer2701851

Managing Director

Enhances web security with a single pane of glass and flexible deployment

I don't see any need for improvement; one of the really good things about iboss as a company is that they listen to customer feedback. I have suggested enhancements, and they are responsive, making changes for the better, and they do a lot of testing. To improve iboss, although we haven't used it, we considered the VPN solution that comes with the highest tier licensing, which includes DLP and various other add-ons. We prefer using another product which automatically logs you back onto your network when turning on your PC. With iboss, the connection is manual, which doesn't meet our needs. Additionally, sizing can be tricky because, although the initial recommendations may seem adequate, actual usage may require more gateways than anticipated.

Read full review

Frank Van Der Spek

Security and Continuity Manager at Rolinco NV

Deployment has been seamless with insightful data categorization and enhanced control

The features of Microsoft Defender for Cloud Apps that I have found most valuable include the overall portal view, with bubble graphs which give us insight into what goes where in the categorization, nowadays with Generative AI but all kinds of categorization, collaboration, etc. That central view of the portal is very useful for us. The impact of Microsoft Defender for Cloud Apps on our organization's ability to assess and manage app related risks has been significant because we have more visibility. Therefore, we can add more control, and we have already done so. This was not possible in the old solution, in the old CASB solution with Netskope. We now can see on the spot, and we do that almost weekly, what the end users are utilizing, which cloud providers or cloud apps they're using. The visibility into OAuth apps provided by Microsoft Defender for Cloud Apps is very good. The visibility into risk and risk management of our organization's Generative AI apps is very nice, as you can choose the category Generative AI and then see exactly what traffic has been going to and from Generative AI in the cloud. This makes us very insightful on what is used within the company. We have some policies on blocking specific Generative AI, and we use within our company one particular AI part, which is CoPilot of Microsoft. In this way, we can see what the end users are using other than CoPilot, and that makes us more in control. The effectiveness of the integration of Microsoft Defender for Cloud Apps with Defender XDR and defending against SaaS attacks is very intuitive. It works immediately if we create a new policy or in Purview or in Microsoft Defender for Cloud Apps, or when we make an app unsanctioned by blocking it, then it is almost immediately, or at least within a couple of hours, effective on all the endpoints where the EDR is running. This gives us much better control over things than before.

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Mohan Janarthanan

Assosiate 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.

Read full review

Quotes from Members

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

Pros

"iboss is among the few products providing inline filtering where no application is needed on the device. It operates on the network side and is not device-based. This feature was one of the main reasons why we stayed with them for so long."

"I would rate the technical support of iboss a solid 10 without a shadow of a doubt."

"We chose iboss for both zero trust and proxy (SWG) because their SWG was superior."

"Iboss is a solution that prevents advanced persistent threats, and has a zero tolerance for attacks."

"From a use-case scenario, what I like the most is the plug-in. I like the fact that we can do the filtering of these devices offsite independent of the network they are connected to, and we do not have to have traffic coming back inside our network."

"We were impressed by the solution's mental health function, which can detect if someone needs help. It scans what users are browsing and flags warning signs so we can check to see if they are okay. We've had to use it a couple of times."

"Content filtering is the most useful feature of iboss."

"iboss is pretty scalable. They provide good support. The case managers you work with to coordinate what you need are pretty good."

More iboss pros

"The raw logs that come directly from Microsoft Defender for Cloud Apps contain all the data I need, and the ability to track activities happening on cloud applications and the alerts provided is an interesting aspect."

"The most valuable feature is the seamless integration across different clouds."

"The product helps us with privileged identity management to control who has access to what and for how long."

"Shadow IT discovery is the feature I like the most."

"The most valuable feature of Microsoft Defender for Cloud Apps is that we are primarily using only the Defender for Cloud on the Azure Cloud."

"Better logging allows us to find problems and take appropriate steps to lock them out."

"The most valuable feature of this solution is its monitoring."

"I would rate it a ten because I have not experienced any stability issues so far with Defender for Cloud Apps."

More Microsoft Defender for Cloud Apps pros

"The most valuable features of Zscaler Internet Access include its capacity to scale, the security implementation capabilities, the ability to integrate public IPs related to clients so traffic presents on the internet as a client, and the facility to interoperate with SSEs while maintaining the same security mechanisms from on-premises to cloud environments."

"The solution's most valuable features are its reliability and availability, measured by the number of ports it offers."

"Zscaler Internet Access is less expensive than competitors like Palo Alto, offering a premium service justified by security enhancements and cost-effective scalability."

"Zscalar Internet Access is for Internet security, like an Internet security gateway. I like how it runs seamlessly in the background with a single sign-on. The controls you can have on devices for Internet security are good, and it doesn't impact speed wherever you're connected. Overall, I think it's very good so far."

"Stability-wise, I rate the solution a nine and a half out of ten...The setup phase was easy."

"The security is excellent."

"The VPN is valuable, as the whole technology is very different from a traditional VPN."

"The most valuable feature for me is the ability to see how my network and traffic looks with modules like analytics and insights."

More Zscaler Internet Access pros

Cons

"Our biggest problem with their service was it did not recognize the device and filtering did not always work correctly."

"The dashboards for local use could be better."

"Fold that in with the risk intelligence they're getting from all of the different subscriptions they are a part of. Now, these security companies subscribe to things like emerging threats, databases, etc. You can fold all this intelligence to decide what's happening on an endpoint. I would love to see them start moving into that space. That would compete directly with Microsoft. Maybe that's why they haven't. Having that ability native within the solution would be great. The other area in which I would love to see improvement is more detailed descriptions of why they block websites."

"To scale up, a new iboss Node Blade Chassis must be purchased."

"For zero trust implementation, we encountered complexity issues, especially with a large infrastructure company ExxonMobil."

"One thing I would like to see differently with their Zero Trust platform is that some of the AI aspects related to high-risk activities have more false positives."

"Sometimes, obviously, there are bugs."

"Sometimes when you call in support, you get someone who is just following a sheet. It feels like a runaround. You feel that you are running into that support wall."

More iboss cons

"Microsoft Defender for Cloud Apps’s technical support services needs improvement."

"The product is very good so far, however, it would be better if it could include more up-to-date threat protection."

"The insights could be improved, especially in reporting. While it is possible for me to see the usage from different cloud apps, determining if critical data has been uploaded or if it is just normal transport data is difficult."

"The graph displayed in the Defender portal mostly doesn't capture the full picture as we see in endpoint-related or identity-related alerts; we can see a complete graph of what is happening there, but Microsoft Defender for Cloud Apps still falls short in capturing that whole aspect in the graph."

"There are challenges with detection and there are challenges with false-positive rates."

"It doesn't actually decrease the time to respond. This has been an issue with Microsoft recently. Sometimes, there is a delay when it comes to getting an alert policy email... Sometimes it takes two or three hours for that email to be sent."

"There are certain areas where the product could improve, such as some functionalities that did not work as expected."

"I want them to enhance in-session policy."

More Microsoft Defender for Cloud Apps cons

"I would like to see more training and video documentation."

"Sometimes it's not easy to use during large deployments of workstations."

"The solution is expensive. They recently revised the pricing and packaging. Some of our existing customers have been asking for alternate solutions for a lower price."

"I would like to see the ability to choose a pool of IPs for my company, set up rules based on them, and know that those IPs are not used by other companies."

"The price of the solution could be improved."

"One thing that they could improve is the ability to import rules from other platforms."

"The solution's technical support needs to be improved, especially by offering a better support structure for different geographical areas."

"With the pricing structure that they currently have, it is only for big customers."

More Zscaler Internet Access cons

Pricing and Cost Advice

"We had the cost of purchasing a new appliance along with the implementation and licensing costs. However, the following year, the cost of just licensing was similar to what was paid the previous year for a new appliance along with the implementation and licensing costs."

"It is probably in line with other solutions, but I do not deal with the financial side."

"The overall pricing for iboss is very competitive and transparent."

"It is not expensive, and it is also not cheap. iboss is priced right in the sweet spot for the number of features it offers."

"We have not priced the solution recently, but they were competitive with other vendors in the past."

"It is expensive compared to one of its competitors."

"Our clients normally use the Microsoft E1 licensing, which is renewed yearly."

"The product's pricing seems fair."

"It has pretty good pricing."

"The pricing is a little bit high but right now, we are okay with it because of the compatibility with Office 365, Teams, and Azure AD."

"We have an educational licensing agreement. It's a customer agreement for multiple years."

"Microsoft offers bundle discounts and a pay-as-you-go option."

"This product is not expensive."

"Its pricing is on the higher side. Its price is definitely very high for a small-scale company. As an enterprise client, we do get benefits from Microsoft. We get a discounted price because of the number of users we have in our company. We have a premier package, and with that, we do get a lot of discounts. There are no additional costs. It only comes in the top-tier packages. Generally, the top-tier license is the best license that you can get for your organization. If you want, you can buy it separately, but that's not a good idea."

More Microsoft Defender for Cloud Apps pricing and cost advice

"Be aware that you will need to invest some time and money to adapt your environment for Zscaler (traffic redirection, software deployment, authentication, etc)."

"It is a few pounds per user per month."

"If we need any extra features, the price will increase."

"Zscaler is an expensive solution, but it's worth the price. Their services are unmatched by competitors. Some may come with half the features that Zscaler can offer and be much cheaper. However, they do not have the global coverage that Zscaler has, and they will not provide the same low latencies and the same speeds that Zscaler can."

"The tool is moderately priced."

"We pay around 6,500 INR per user per year, which is very expensive. I would rate Zscaler's pricing one out of five."

"It is costlier than other solutions."

"The price is competitive. It's not cheap and it's not expensive."

More Zscaler Internet Access pricing and cost advice

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Top Industries

By visitors reading reviews

No data available

Financial Services Firm

11%

Computer Software Company

11%

Manufacturing Company

Government

Computer Software Company

13%

Manufacturing Company

11%

Financial Services Firm

10%

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	6
Midsize Enterprise	6
Large Enterprise	5

By reviewers
Company Size	Count
Small Business	15
Midsize Enterprise	10
Large Enterprise	19

By reviewers
Company Size	Count
Small Business	17
Midsize Enterprise	9
Large Enterprise	38

Questions from the Community

What needs improvement with iboss?

For zero trust implementation, we encountered complexity issues, especially with a large infrastructure company Exxon...

See all answers

What is your primary use case for iboss?

Previously when I used iboss, we did the POC for iboss for ExxonMobil. Four or five people wanted to move from our ol...

See all answers

What is your experience regarding pricing and costs for iboss?

Regarding pricing, setup costs, and licensing, iboss is not cheap, and that's my only concern. There are cheaper alte...

See all answers

Which is the better security solution - Cisco Umbrella or Microsoft Cloud App Security?

Cisco Umbrella is an integral component of the Cisco SASE architecture. It integrates security in a single, cloud-nat...

See all answers

What is your experience regarding pricing and costs for Microsoft Cloud App Security?

At the time of implementation, when the size of our organization was small, it was a more affordable product. Since a...

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What needs improvement with Microsoft Cloud App Security?

The fidelity of the signal in Microsoft Defender for Cloud Apps has been a challenge in some areas. There have been i...

See all answers

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...

See all answers

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 ...

See all answers

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...

See all answers

Comparisons

Netskope vs iboss

Compared 13% of the time

Prisma Access by Palo Alto Networks vs iboss

Compared 10% of the time

Cisco Umbrella vs iboss

Compared 9% of the time

FortiSASE vs iboss

Compared 7% of the time

Fortinet FortiGate vs iboss

Compared 6% of the time

More iboss Competitors

Cisco Umbrella vs Microsoft Defender for Cloud Apps

Compared 14% of the time

Netskope vs Microsoft Defender for Cloud Apps

Compared 10% of the time

Prisma Access by Palo Alto Networks vs Microsoft Defender for Cloud Apps

Compared 7% of the time

Skyhigh Security vs Microsoft Defender for Cloud Apps

Compared 5% of the time

Microsoft Defender for Cloud vs Microsoft Defender for Cloud Apps

Compared 5% of the time

More Microsoft Defender for Cloud Apps Competitors

Cisco Umbrella vs Zscaler Internet Access

Compared 22% of the time

Netskope vs Zscaler Internet Access

Compared 13% of the time

Prisma Access by Palo Alto Networks vs Zscaler Internet Access

Compared 12% of the time

FortiSASE vs Zscaler Internet Access

Compared 4% of the time

Skyhigh Security vs Zscaler Internet Access

Compared 1% of the time

More Zscaler Internet Access Competitors

Product Reports

Buyer's Guide

iboss

January 2026

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Buyer's Guide

Microsoft Defender for Cloud Apps

January 2026

Microsoft Defender for Cloud Apps report

Download Microsoft Defender for Cloud Apps product report

Buyer's Guide

Zscaler Internet Access

January 2026

Download Zscaler Internet Access product report

Also Known As

iBoss Cloud Platform

MS Cloud App Security, Microsoft Cloud App Security

ZIA

Overview

Iboss offers a comprehensive cloud-based security platform valued for its scalability and autonomous features, ensuring robust security with easy deployment and management capabilities.

Renowned for its robust security architecture, Iboss integrates seamlessly within diverse networks, delivering efficient granular filtering and advanced content categorization. Its single pane of glass console provides ease of management, allowing rapid scalability suitable for rapidly deploying environments. Operates in BYOD setups due to inline filtering without device installation. Integration with cloud-based applications enhances user control, and features like SASE, SSL inspection, and ChatGPT risk protection stand as highlights. Despite its strengths, users have pointed out areas for enhancement like direct navigation in reports, SSL decryption, and better cloud integration while having room to improve data loss prevention.

What are the most important features of Iboss?

Scalability: Supports rapid deployment across diverse networks.
SASE: A consolidated approach to secure access.
SSL Inspection: Ensures safe data transmission.
Granular Filtering: Detailed control over accessible content.
Single Pane Management: Unifies control through a centralized console.

What benefits should users consider in reviews?

Cost-effectiveness: Offers competitive pricing with robust features.
Autonomous Operation: Reduces management overhead.
Responsive Support: Provides assistance when needed.
Flexible Deployment: Available for both cloud and on-premises environments.

The usage of Iboss spans educational institutions, specifically K-12, to enforce internet policies, protect data, and support remote work environments. It provides web filtering and security frameworks to ensure safe browsing. Its platform-as-a-service model offers flexibility for both cloud-based and on-premises requirements, integrating seamlessly to deliver enhanced security features suitable for various deployment needs including zero trust, CASB, and network security for work-from-home setups.

iboss

Microsoft Defender for Cloud Apps is a comprehensive security solution that provides protection for cloud-based applications and services. It offers real-time threat detection and response, as well as advanced analytics and reporting capabilities. With Defender for Cloud Apps, organizations can ensure the security of their cloud environments and safeguard against cyber threats. Whether you're running SaaS applications, IaaS workloads, or PaaS services, Microsoft Defender for Cloud Apps can help you secure your cloud environment and protect your business from cyber threats.

Microsoft Defender for Cloud Apps Benefits:

Provides comprehensive security for cloud applications
Integrates with other Microsoft security tools
Easy to use and deploy
Provides real-time threat detection and response
Strong protection against phishing attacks and other common threats
Highly customizable to meet specific needs of different organizations

Microsoft Defender for Cloud Apps Use Cases:

Governance, authentication, security, and compliance.
Detects shadow IT and anomalous user behavior
Controls access to applications
Provides auditing and filtering setups
Used for end-user compute devices, file monitoring, user investigation, and activity
Used for data governance, threat detection, and getting visibility over cloud applications
Used to identify information about applications beyond organizational boundaries
Prevent exfiltration and data filtration of corporate data
Used to deal with spam emails and detect shadow IT

Reviews from Real Users

Ram-Krish, Cloud Security & Governance at a financial services firm, says that Microsoft Defender for Cloud Apps "Integrates well and helps us in protecting sensitive information, but takes time to scan and apply the policies and cannot detect everything we need".

PeerSpot user, Senior Cloud & Security Consultant at a tech services, writes that Microsoft Defender for Cloud Apps "Great for monitoring user activity and protecting data while integrating well with other applications".

Simon Burgess,Infrastructure Engineer at SBITSC, states that Microsoft Defender for Cloud Apps is "A fluid, intelligent product for great visibility, centralized management, and increased uptime".

Microsoft

Zscaler Internet Access is a cloud-native security service edge (SSE) platform. Its main purpose is to provide AI-powered protection for all users, all applications, and all locations. The solution replaces other legacy network security solutions to stop advanced attacks and prevent data loss by using a comprehensive zero trust approach.

Zscaler Internet Access Features

Zscaler Internet Access has many valuable key features. Some of the most useful ones include:

Proxy (native SSL)
IPS and advanced protection
Cloud sandbox
DNS security
Cloud firewall
URL filtering
Bandwidth control
DNS filtering
Cloud DLP w/EDM and IDM
Cloud access security broker (CASB)
Cloud security posture management (CSPM)
CloudBrowser isolation
Cloud secure web gateway (SWG)
Zero trust network access (ZTNA)
Digital experience monitoring

Zscaler Internet Access Benefits

There are several benefits to implementing Zscaler Internet Access. Some of the biggest advantages the solution offers include:

Fast access with zero infrastructure: Zscaler Internet Access creates a fast, seamless user experience because of its direct-to-cloud architecture. With no infrastructure, Zscaler Internet Access helps you eliminate backhauling, which improves performance and simplifies network administration.

Threat intelligence: By using threat intelligence, Zscaler Internet Access can stop ransomware, zero-day malware, and advanced attacks via Inline inspection of all internet traffic, including SSL decryption, and a suite of AI-powered cloud security services.

Consistent security: With Zscaler Internet Access, your security policy goes everywhere your users go. When you move security to the cloud, all users, applications, devices, and locations remain protected and secure based on identity and context.

Hybrid workforce: Zscaler Internet Access enables secure access to all external and internal apps from anywhere, so remote work is not an issue. You can also enforce business policies that follow the user, making security identical regardless of location.

Reviews from Real Users

Below are some reviews and helpful feedback written by Zscaler Internet Access users.

A Service Manager at a construction company says, "There are a bunch of different capabilities that are valuable within the platform. We use quite a lot of them, but not everything. The ones that are most important to us are the URL Filtering and the application control. For our needs, the cloud-native proxy architecture is a very good solution. This architecture helps with cyber threats because we inspect most of the traffic and we can see that a lot of threats are stopped directly in the secure web gateway."

Owen N., Security Architect at Claro Enterprise Solutions, explains that the solution’s most valuable features include “The integration of the gateway that inspects all ports and protocols. So, there is threat prevention; The cloud sandbox; VNS security; Access control that will protect URL filtering and the cloud firewall; Data protection that will protect your gateway, like your CASB or your cloud DLP; The capabilities of this will point your traffic to Zscaler Cloud.”

An Architecture Senior Manager at an insurance company mentions, "The data loss prevention feature is the most valuable. It stops our users from inadvertently leaking our customers' data to the Internet or anywhere else it shouldn't go." He also adds, “The solution provides quick access to cloud services, securing our data and allowing us to inspect all our traffic.”

Zscaler

Sample Customers

More than 4,000 global enterprises trust the iboss Cloud Platform to support their modern workforces, including a large number of Fortune 50 companies.

Customers for Microsoft Defender for Cloud Apps include Accenture, St. Luke’s University Health Network, Ansell, and Nakilat.

Ulster-Greene ARC, BanRegio, HDFC, Ralcorp Holdings Inc., British American Tobacco, Med America Billing Services Inc., Lanco Group, Aquafil, Telefonica, Swisscom, Brigade Group

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January 2026

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