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Proofpoint Cloud App Security Broker vs Zscaler Private Access (ZPA) comparison

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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

iboss
Sponsored
Ranking in Cloud Access Security Brokers (CASB)
6th
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
24
Ranking in other categories
Secure Web Gateways (SWG) (6th), Internet Security (3rd), Web Content Filtering (1st), ZTNA as a Service (6th), Secure Access Service Edge (SASE) (7th)
Proofpoint Cloud App Securi...
Ranking in Cloud Access Security Brokers (CASB)
17th
Average Rating
8.2
Reviews Sentiment
7.7
Number of Reviews
5
Ranking in other categories
No ranking in other categories
Zscaler Private Access (ZPA)
Ranking in Cloud Access Security Brokers (CASB)
9th
Average Rating
9.0
Reviews Sentiment
6.9
Number of Reviews
13
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2026, in the Cloud Access Security Brokers (CASB) category, the mindshare of iboss is 4.5%, up from 2.1% compared to the previous year. The mindshare of Proofpoint Cloud App Security Broker is 1.0%, up from 0.7% compared to the previous year. The mindshare of Zscaler Private Access (ZPA) is 2.1%, up from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Cloud Access Security Brokers (CASB) Mindshare Distribution
ProductMindshare (%)
iboss4.5%
Zscaler Private Access (ZPA)2.1%
Proofpoint Cloud App Security Broker1.0%
Other92.4%
Cloud Access Security Brokers (CASB)
 

Featured Reviews

Ashok Ananthula - PeerSpot reviewer
Senior Consultant Proxy Engineering at a financial services firm with 10,001+ employees
Cloud gateway has strengthened remote web security and now needs better Mac and ISP support
The problem our organization had is that iboss failed for the Mac devices. It is not able to give a successful agent for the Mac agents. That is where in 2025, we had to migrate to the Palo Alto-based platform. If your use case is for just Windows laptops,you can consider this platform as an option One issue is the data center resiliency part. In India especially, they are not tied up with the Tier 1 ISPs like Tata or Airtel; they were having Tier 2 ISPs and encountered many issues reaching few major sites that my organization depends on, and they were having problems that they could not fix quickly. They also lack a mechanism to route that traffic within their data center; rather, they ask customers to make a pac file change to route it to Singapore explicitly. It would be better if they route from their backend , i mean even if I send it to India DC, they should be able to route it internally to make that work; however, they fail to do that and ask the customer to route it in the pac file. Another suggestion is that in China, they do not have the proper setup; they used to have numerous problems with slowness and lack of premium circuits in China as well. That leads to multiple sites working slowly with latency-related issues. So the main issue is the ISP-related problems that need to be solved.
Farzad Ebrahimi - PeerSpot reviewer
Senior Devsecops Cloud Cybersecurity Specialist at CGI
Layered security has protected our cloud AI apps and significantly reduced attack incidents
The best features Proofpoint Cloud App Security Broker offers are multilayer protection against security attacks and escalation. The escalation feature in Proofpoint Cloud App Security Broker is valuable because we are using more and more users, and it is very scalable in relation to the number of users using the same app on the cloud. The performance of Proofpoint Cloud App Security Broker stands out as the number of attacks blocked is more than 90%. Proofpoint Cloud App Security Broker has positively impacted my organization by resolving all of the security issues related to app security. I can share specific outcomes, such as a reduction in the number of incidents, which is more than 90% related to the past.
BasilJiji - PeerSpot reviewer
System engineer at a retailer with 10,001+ employees
Zero trust access has secured hybrid work and now provides seamless app connectivity
Zscaler Private Access (ZPA) has significantly reduced our attack surface by making our internal apps invisible to the internet. It effectively eliminates lateral movement as users are only connected to the specific application they are authorized to use rather than the entire network segment. Zscaler Private Access (ZPA) is highly stable. The architecture uses a global mesh of service edges with built-in fault tolerance and redundancy, providing an always-on experience that is far more reliable than our old hardware-based VPN concentrator. Zscaler Private Access (ZPA) is elastically scalable because it is a software-defined perimeter and not an appliance-based solution. I can instantly scale to support thousands of additional users without needing to upgrade any physical hardware.

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."
"As I mentioned, the return on investment is significant, as it saved our office locations' bandwidth because when you are working remotely at home, your internet traffic routes directly to iboss and will not go to your office building, saving bandwidth bottlenecks and ensuring that issues with our building internet circuits will not impact your internet connectivity because you are directly going to the iboss data center."
"Deploying iboss leads to good return on investment, estimated around 70% to 80%."
"Granular setup, which was able to set different levels of filters using the OUs in the AD."
"First of all, the security policies are essential. I do not have to rely solely on Active Directory for our users."
"This product is solid, fairly easy to use, and reliable."
"The solution has massively improved our security posture, giving us full visibility into what our staff does online."
"The iboss solution gives me the ability to scan the traffic through all the ports, through all the 131,000 PCP and UDP ports, and with this ability, we have the granularity also for consults over social media and applications on mobile, and this is an advantage that the customers are looking for right now."
"The tool's most valuable feature is reporting. It helps us understand what's going on in our environment."
"From stability and availability standpoints, it is pretty good."
"The quarantine feature is the solution's most valuable aspect."
"The product is stable."
"Proofpoint Cloud App Security Broker has positively impacted my organization by resolving all of the security issues related to app security."
"Zscaler Private Access (ZPA) does an excellent job offering secure remote access to internal applications for our distributed workforce because it provides a granular way to grant access for specific people with specific applications."
"Zscaler Private Access (ZPA) is the most mature compared to other vendors in terms of features and stability."
"Zscaler ZPA is easy to administer and is organized in a straightforward and logical manner."
"Zscaler Private Access (ZPA) is a mature, enterprise-grade Zero Trust solution that delivers security and operational benefits."
"The features I appreciate the most about Zscaler Private Access (ZPA) are that it is very easy to use, and we have Terraform for it, which makes it even easier and very straightforward."
"Zscaler Private Access (ZPA) is more secure than these particular VPN solutions."
"Zscaler has allowed an easy, secure way for us to access our internal resources from outside."
"The best advantage of the product is that it is always on as a VPN, which gives us much more functionality."
 

Cons

"I am currently doing a PoC of the zero trust aspect of it. Compared to other similar solutions, it is hard to get around each feature. It takes a while to get used to it."
"Regarding pricing, setup costs, and licensing, iboss is not cheap, and that's my only concern."
"The solution could be stronger on the integration side and offer more cloud applications like G Suite or Oracle."
"Sometimes, obviously, there are bugs."
"The reporting feature needs improvement. It doesn't give you the expected results. It is quite difficult to get the specific reports needed, and it is not as intuitive as the rest of the platform."
"The area I would like to see improvement in is the ability with in the reporter to navigate directly to the content the user is traversing. It is kind of there, but it's not perfect. Quite frequently, I receive links that lead me to pages with error messages."
"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."
"The endpoint-type solution is an area that needs some improvement."
"I think some of the hiccups that we had were with the number of domains that we had and how that had to be implemented in Proofpoint."
"They are priced significantly higher and less cost-effective than alternative options."
"The TLS encryption needs to be improved. It's not state of the art."
"Proofpoint Cloud App Security Broker should be cheaper."
"The training costs associated with Zscaler Private Access (ZPA) are very high, and there are few resources available online."
"One area for improvement is setting posture profiles for vendor machines."
"There are some bugs in the solution."
"The rollout process could be much easier, and the configuration of identity providers like Azure is more complicated than with other zero trust network providers. This can be a pain point."
"I am not happy with the technical support from Zscaler Private Access (ZPA), particularly in India, where reachability is an issue with salespersons."
"The current pain points we sometimes experience relate to the additional security applications we have on the laptops, and sometimes I don't know if I didn't get any notification from the application because it's an agent problem or something security-wise blocking this."
"The solution is not scalable; we deploy it in a high-availability environment, but it's not automated."
"Zscaler restricts customization to a maximum of 256 customizable rules, which can be a limitation for us."
 

Pricing and Cost Advice

"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 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."
"The overall pricing for iboss is very competitive and transparent."
"It is expensive compared to one of its competitors."
"We have not priced the solution recently, but they were competitive with other vendors in the past."
"It is probably in line with other solutions, but I do not deal with the financial side."
"We had an enterprise contract with them for about 32,000 users at that point, which has now grown."
"The tool's most valuable feature is reporting. It helps us understand what's going on in our environment."
Information not available
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Top Industries

By visitors reading reviews
Financial Services Firm
11%
Manufacturing Company
10%
Comms Service Provider
8%
Construction Company
7%
Financial Services Firm
17%
Outsourcing Company
13%
Manufacturing Company
13%
Computer Software Company
11%
Outsourcing Company
16%
Financial Services Firm
13%
Insurance Company
9%
Comms Service Provider
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business13
Midsize Enterprise7
Large Enterprise11
No data available
By reviewers
Company SizeCount
Small Business2
Midsize Enterprise4
Large Enterprise7
 

Questions from the Community

What needs improvement with iboss?
I think iboss could be improved by making reporting and dashboard customization more flexible, and simplifying troubl...
What is your primary use case for iboss?
I use iboss as a cloud-based secure web gateway to provide secure internet access, web filtering, and protect remote ...
What is your experience regarding pricing and costs for iboss?
My experience with iboss's pricing structure, setup cost, and licensing model has been positive, straightforward, and...
What needs improvement with Proofpoint Cloud App Security Broker?
Proofpoint Cloud App Security Broker can be improved with more AI features, as it could help. I feel it is fine to no...
What is your primary use case for Proofpoint Cloud App Security Broker?
My main use case for Proofpoint Cloud App Security Broker is to protect our applications on the cloud against securit...
What advice do you have for others considering Proofpoint Cloud App Security Broker?
My advice to others looking into using Proofpoint Cloud App Security Broker is that more AI features are needed. Proo...
What is your experience regarding pricing and costs for Zscaler Private Access (ZPA)?
Regarding pricing, setup costs, and licensing for Zscaler Private Access (ZPA), while it is not the cheapest solution...
What needs improvement with Zscaler Private Access (ZPA)?
After deploying Zscaler Private Access (ZPA), I notice a reduction in VPN-related support tickets, particularly durin...
What is your primary use case for Zscaler Private Access (ZPA)?
My primary use case for Zscaler Private Access (ZPA) is securing application-level access to internal applications wi...
 

Also Known As

iBoss Cloud Platform
FireLayers, PCASB
No data available
 

Overview

 

Sample Customers

Trusted by global enterprises and government agencies.
Emerging Technologies, HP, CSA, Perion
Information Not Available
Find out what your peers are saying about Proofpoint Cloud App Security Broker vs. Zscaler Private Access (ZPA) and other solutions. Updated: September 2026.
915,341 professionals have used our research since 2012.