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Cloud Security Connector for Zscaler vs Quad9 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

Cloud Security Connector fo...
Ranking in Internet Security
5th
Average Rating
8.6
Reviews Sentiment
7.8
Number of Reviews
10
Ranking in other categories
No ranking in other categories
Quad9
Ranking in Internet Security
6th
Average Rating
6.0
Reviews Sentiment
7.9
Number of Reviews
2
Ranking in other categories
Managed DNS (4th)
 

Mindshare comparison

As of August 2026, in the Internet Security category, the mindshare of Cloud Security Connector for Zscaler is 0.8%. The mindshare of Quad9 is 4.8%, down from 5.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Internet Security Mindshare Distribution
ProductMindshare (%)
Cloud Security Connector for Zscaler0.8%
Quad94.8%
Other94.4%
Internet Security
 

Featured Reviews

Vibin Thomas - PeerSpot reviewer
Technical Team Lead - Content Security at Valuepoint Systems
Unified cloud policies have improved zero-trust controls and simplified workload monitoring
A challenge faced during the initial implementation involved routing and application dependency. After routing cloud workload traffic through Cloud Security Connector for Zscaler, a few applications started failing because they depended on specific external services that were getting blocked due to strict policies or SSL inspection. To resolve this, traffic was analyzed using Zscaler logs, the exact domains and services being impacted were identified, and a controlled policy exception was created while maintaining overall security. This helped strike the right balance between security and application availability, which is very important in production environments. A key learning from this was that while Cloud Security Connector for Zscaler provides strong security control, proper policy tuning and understanding application behavior is critical for smooth deployment. Cloud Security Connector for Zscaler has had a very positive impact, especially in terms of security and operational efficiency. Before implementation, cloud workloads had direct internet access through the NAT gateway, which limited visibility and control over outbound traffic. After adopting Cloud Security Connector for Zscaler, all traffic was routed through Zscaler, giving centralized visibility and full policy enforcement. One improvement observed was a significant increase in threat detection. The ability to identify and block suspicious outbound connections that were previously not visible improved the overall security posture. From an operational perspective, troubleshooting became much faster. Instead of checking multiple cloud logs, Zscaler logs could be directly used to analyze traffic behavior, which reduced incident resolution time. The dependency on traditional firewall appliances in cloud environments was reduced, which simplified the architecture and lowered operational overhead. Additionally, for compliance-driven clients in banking, it helped meet audit requirements by providing detailed logs and consistent policy enforcement across both users and workloads. Measurable improvements were observed after implementing Cloud Security Connector for Zscaler. In terms of visibility and threat detection, a 25 to 35 percent increase in identifying suspicious outbound connections was seen that were previously not visible when traffic was going through NAT. From an operational standpoint, troubleshooting time reduced by 45 to 55 percent because Zscaler logs could be directly analyzed instead of checking multiple cloud logs. Dependence on additional security appliances in the cloud was also reduced, which helped lower operational overhead and simplified the architecture. In terms of compliance, better audit readiness was achieved with centralized logging and consistent policy enforcement across workloads and users. While Cloud Security Connector for Zscaler is a strong solution, one area that could be improved, especially for teams that are new, is configuring route tables, ensuring proper traffic flow, and avoiding asymmetric routing, which can be challenging, particularly in large or multi-VPC environments. More automated deployment options or guided configurations, especially for AWS or Azure, would simplify the onboarding process. Another area for improvement is better visibility at the cloud-native level, such as tighter integration with cloud logs or more context-aware insight for workload behavior, which would make troubleshooting even faster. Once properly implemented, it works efficiently and provides strong security and visibility. In addition to deployment simplicity, improvements around policy tuning and documentation would add significant value. From a policy perspective, when Zscaler policy is extended to cloud workloads, it sometimes requires careful fine-tuning to avoid impacting application dependency. More predefined templates or workload-specific policy recommendations would help teams implement it faster with fewer disruptions. In terms of documentation, while the existing guides are helpful, more step-by-step real-world deployment examples, especially for multi-VPC or hybrid environments, would make onboarding smoother for teams. Tighter integration guidance with cloud-native tools such as AWS logging or monitoring services would further improve troubleshooting and visibility. From a support standpoint, faster access to best practice recommendations or reference architecture would help teams avoid common misconfigurations during the initial setup.
Louis Geoffroy - PeerSpot reviewer
President at IDEBUG
It's easy to use and set up, but I've faced performance problems
I have experience with Quad9 and most other filtering solutions. Quad9 was working well initially, but it started slowing, so I switched to OpenDNS. I recently checked Tom's Hardware, an IT review site, and read a review of seven DNS filters. Open DNS was ranked the fastest, and Quad9 was second. Google was on there too, but they said it didn't filter enough.

Quotes from Members

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

Pros

"Cloud Security Connector for Zscaler has positively impacted our organization by helping us in our cloud environment to connect our resources to Zscaler, ensuring that security policies are consistent with zero-trust access and increasing reliability by 28%."
"The impact of Cloud Security Connector for Zscaler on our organization has been very positive as it is a very efficient application that we use for ninety percent of the clients."
"Cloud Security Connector for Zscaler has had a very positive impact, especially in terms of security and operational efficiency."
"Cloud Security Connector for Zscaler has positively impacted my organization, because now whenever we log into our VDI, we can access our apps directly without connecting to a separate VPN, saving approximately five to ten minutes each time and significantly improving our productivity and screen time."
"Cloud Security Connector for Zscaler has positively impacted our organization in securing a lot."
"Cloud Security Connector for Zscaler has positively impacted my organization by improving the ROI side, as it reduced tool and architecture complexity because it can replace or reduce dependence on VPN, virtual firewall, NAT, proxy tools, and other similar solutions."
"While we are operating Cloud Security Connector for Zscaler, we have noticed a radical drop in architectural complexity, along with a massive cloud infrastructure cost reduction and accelerated incident response times."
"The solution is secure."
"Setting up Quad9 is straightforward if you know what you're doing, and it's easy to use overall."
"The most valuable feature of Quad9 is that it is a free solution."
 

Cons

"However, whenever I turn on or turn off and turn on my VDI, every time while opening, it will ask me to sign into Cloud Security Connector for Zscaler."
"While Cloud Security Connector for Zscaler is a strong solution, one area that could be improved, especially for teams that are new, is configuring route tables, ensuring proper traffic flow, and avoiding asymmetric routing, which can be challenging, particularly in large or multi-VPC environments."
"Cloud Security Connector for Zscaler can be improved by offering seamless OS upgrades while moving beyond reprovisioning, along with high-throughput burst performance and horizontal scaling."
"The best value comes when you already use the Zscaler ecosystem, so if you have anything other than the Zscaler ecosystem, it may not work optimally."
"The connectivity could be faster."
"One thing we can improve regarding Cloud Security Connector for Zscaler is that every time I log into my laptop, it asks me to sign in to Cloud Security Connector for Zscaler again and again."
"If there are any issues at the network level, such as users working from home, then it is very hard to catch up with them and resolve issues on the end-user machine."
"I believe they could improve by reducing the response time for high-priority cases and providing more proactive updates during long investigations."
"Quad9 could improve by having more free features, such as custom DNS filtering."
"It used to work fine for all the devices, but it started to slow and become non-responsive. I would have to reload the page two or three times before all the pages loaded. With OpenDNS, I only need to load the page once."
 

Pricing and Cost Advice

Information not available
"The price of Quad9 is free."
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909,725 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Construction Company
22%
Manufacturing Company
13%
Insurance Company
10%
Financial Services Firm
10%
Comms Service Provider
26%
Computer Software Company
8%
Hospitality Company
6%
Manufacturing Company
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise1
Large Enterprise6
No data available
 

Questions from the Community

What is your experience regarding pricing and costs for Cloud Security Connector for Zscaler?
My experience with pricing, setup cost, and licensing for Cloud Security Connector for Zscaler reveals that the pricing can be complex since it is rarely sold at a stand-alone price. Instead, the l...
What needs improvement with Cloud Security Connector for Zscaler?
Cloud Security Connector for Zscaler agents have some issues while applying the policies, and the main thing is when we try to apply policies over the ZCC agent, it takes a couple of minutes. I thi...
What is your primary use case for Cloud Security Connector for Zscaler?
The main use case for Cloud Security Connector for Zscaler is monitoring the cloud traffic that we do, and we can connect cloud security applications with the AWS and GCP infrastructure so that we ...
Which would you choose - Cloudflare DNS or Quad9?
Cloudflare DNS is a very fast, very reliable public DNS resolver. It is an enterprise-grade authoritative DNS service that offers great redundancy and advanced security with built-in unmetered and ...
 

Overview

 

Sample Customers

Information Not Available
CISCO, Netlab, proofpoint
Find out what your peers are saying about Cloud Security Connector for Zscaler vs. Quad9 and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.