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Avanan vs Microsoft Defender for Office 365 comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Feb 8, 2026

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

Cloudflare One
Sponsored
Ranking in Email Security
20th
Average Rating
8.6
Reviews Sentiment
6.5
Number of Reviews
23
Ranking in other categories
Secure Web Gateways (SWG) (13th), Data Loss Prevention (DLP) (22nd), Cloud Access Security Brokers (CASB) (13th), Distributed Denial-of-Service (DDoS) Protection (9th), Software Defined WAN (SD-WAN) Solutions (12th), Access Management (11th), Bot Management (3rd), ZTNA as a Service (9th), ZTNA (4th), Secure Access Service Edge (SASE) (9th), Remote Browser Isolation (RBI) (3rd)
Avanan
Ranking in Email Security
22nd
Average Rating
9.2
Reviews Sentiment
7.8
Number of Reviews
18
Ranking in other categories
Data Loss Prevention (DLP) (41st)
Microsoft Defender for Offi...
Ranking in Email Security
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (3rd), Microsoft Security Suite (8th), Secure Email Gateway (SEG) (2nd)
 

Mindshare comparison

As of July 2026, in the Email Security category, the mindshare of Cloudflare One is 1.7%, up from 1.5% compared to the previous year. The mindshare of Avanan is 2.1%, down from 3.8% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 6.1%, down from 12.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3656.1%
Cloudflare One1.7%
Avanan2.1%
Other90.1%
Email Security
 

Featured Reviews

CV
Network Architect at IP Dimension
Cloud security has improved remote access and has reduced costs for smaller client sites
I have used Cloudflare One's Identity-Aware Proxy, and it is quite straightforward from what I have seen so far. The app registration on the Azure side integrates fully into Cloudflare, and I am very satisfied with that part because it is easy to set up. The integration of Cloudflare One's Secure Web Gateway and Zero Trust Network Access works without any issues. That part is pretty automatic, and if you complete the rest of the setup, it comes together by itself with no issues from my side. What makes it nice is that we can actually start replacing on-site firewalls at this stage for the smaller clients because it does not matter if they go to a coffee shop or work from home; they are still secured by the same connection. The hops get shorter and you get better latency. We have done testing to see if it is better. One thing that we did notice with our proof of concept with our current client is that they have people connecting from the UK. When they used their previous VPN solution, uploading CAD drawings and other files to the server took a long time. They mentioned that it is much quicker on Cloudflare One's solution. I definitely believe that is part of the improved performance, and I am satisfied with that as well. What is nice about Cloudflare One is that it makes the setup easier and also easier to train technicians to maintain it. Compared to legacy systems, we do not need to get fancy firewalls in place that are costly. That is definitely also a cost-saver with Cloudflare One.
Robert Melendez - PeerSpot reviewer
Vice President Information Technology at Makeready
Enhances email security and has a very simple and easy-to-use UI
Spam protection is the most valuable feature. We have implemented the tool to enhance our email security. It helps prevent phishing attacks. The anomaly detection capabilities are baked into the security platform. The product integrates wonderfully with Microsoft 365. It's built right on a cloud platform and works almost natively. The solution has a very simple and easy-to-use UI. The tool appears extremely powerful and has a good solid feature set. It catches things that are bad for my environment. The user interface is good the way it is. If the solution continues down that path, I see no problems with the way it is going. It feels like a mature product.
Emeka Ndulu - PeerSpot reviewer
Cloud Solutions Architect at a tech services company with 201-500 employees
Improves threat visibility and response while reducing manual tasks and training users against phishing
I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection. It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment. I get to detect it and respond, so the threat intelligence is very effective. Microsoft security solutions save my time. It saves money because once I protect my environment, I don't lose money. It has decreased my detection time and my time to respond.

Quotes from Members

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

Pros

"Cloudflare Access is a stable solution."
"Cloudflare Zero Trust Platform removes the risk of exposing the applications to the public."
"The blocking feature is very good."
"It will take the blow rather than our applications should an attack occur."
"Enables me to work from two locations."
"Cloudflare is by far the most effective solution that I have come across."
"Cloudflare DDoS is better than its competitors for its security, deployment, and scalability."
"For Cloudflare Access, I am using the free plan...The most valuable feature is their protection."
"Now, we aren't worried about any email threats as Avanan catches everything."
"It can detect corrupted files and filters out documents with viruses."
"The threat detection tools enable us to ascertain malware and phishing messages across the email network infrastructure."
"The customizable rules allow you to change aspects."
"Overall, compared to features, the cost is very reasonable and output of this tool is very good."
"The program has reduced the dangers related to phishing, malware, ransomware, and other vulnerabilities."
"Avanan is just outstanding on how efficient and effective their learning modules are to pick up on these different pieces."
"If we look at four to five years ago, we had close to six or eight people click a link in an email per month. Now, we are probably down to about five or six clicks a year, if not less."
"Microsoft Defender for Office 365 saves me time; it does save a lot of time, especially with the automation."
"It also gives me good visibility because, with Defender, I'm using a Microsoft product to defend Microsoft products. The integration was really seamless and I have wide visibility because it picks up almost everything. Literally, I can see almost every activity that happens, from the e-mail to the workstation itself."
"One of our clients didn't have the budget to invest in a SOC team, but we deployed the solution for them, and they now run a SOC with only one analyst."
"Defender enables us to secure all 365-related activity from a single place. It gives us visibility into everything happening in Outlook, protecting us against phishing and other email-based threats. Defender helps us detect any suspicious behaviors."
"With Defender for Office 365, we have been able to increase the security posture across our organization."
"Microsoft Defender for Office 365's most valuable feature is its performance."
"It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment."
"Defender helps us prioritize threats across our organization."
 

Cons

"The free plan has limitations. For example, I can only set up three rules, and the application firewall is unavailable."
"They don't have a person to provide support for customers using the solution under their free plan."
"Feedback could be enhanced. While I work efficiently with Clover as a partner in Mexico City, sometimes the information and requests are easier to manage with more concrete solutions."
"The pricing is an area that can be improved. Pricing, as far as I recall, was the source of our problems."
"When there are any dynamic changes in complex applications, the tool takes a lot of time, making its analytics-related area a major matter of concern where improvements are needed."
"Cloudflare Zero Trust Platform needs to improve its documentation. It took time to do the implementation."
"The software has automated alerts, but the automated alerts are not available in the mobile app."
"Operating and tuning the product is difficult."
"There are some things that they can't remediate. The honest thing is nobody can right now because of the nature of how some of the secure email platforms work."
"They need a little bit of improvement in AI logic, as sometimes, it quarantines frequent mailers as spam or suspects."
"The system could be designed to give corporate emails first priority due to demands."
"Familiarization with performance for new teams may take a long time."
"Since it periodically identifies ordinary emailers as spam or dubious, they may need some AI logic improvement."
"There are times when we have false positives."
"Email querying is not efficient throughout."
"The cost can be reviewed to enable SMEs to acquire it and enjoy great security features."
"The changes to customer service, specifically the new model for support agreements, are not favorable."
"Microsoft Defender for Office 365 should improve the troubleshooting tools. It's unclear whether the device is blocked at the firewall level or at the device itself. The granularity needed for troubleshooting is currently lacking. From my perspective, Microsoft should address this issue to benefit many users who likely share the same sentiment."
"Configuring the default strategies and policies in Microsoft Defender for Cloud Apps generates a lot of noise and false positives."
"To improve Microsoft Defender for Office 365, it would be nice to have more accessibility for users to see on their end what they are doing that could cause a threat."
"There needs to be an improvement in integrating the product to work across multiple operating systems, and to have better support for non-Microsoft file types."
"Microsoft Defender for Office 365 must improve the overall management style, including the GUI. It also needs to change the filters so that it is easy to whitelist and blacklist data."
"The certification training for Defender for 365 needs to be deeper and incorporate Sentinel. I took all the security courses except one, and Sentinel isn't included."
"We need a separate license and we don't know how to get the license that is required."
 

Pricing and Cost Advice

"The solution is not that expensive."
"The solution's pricing lacks transparency."
"Cloudflare Zero Trust Platform's pricing is good."
"The prices are slightly expensive."
"The pricing is somewhere in the middle. I would rate the pricing a seven out of ten."
"The price tag is no longer $200,000, but rather $300,000 to $400,000. It's twice."
"The pricing of the solution is cheap. The licensing cost is also very low. I rate the cost and pricing a three out of ten."
"My company has to make yearly payments towards the licensing costs attached to the solution. There are no hidden charges apart from the licensing costs of the solution."
"The product is not the cheapest in the market."
"Having the flexibility and modeling to do the pricing that best fits the needs of the organization is incredibly ideal. That is what Avanan does. They know exactly how many users are using it, etc. We can tune the invoicing associated with how we are using the product so we can charge it back to the shows appropriately."
"The pricing of Avanan is reasonable."
"Good pricing arrangement as an SaaS offering."
"Avanan’s price is comparable to Barracuda."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"The license is expensive because the cost is based on the number of users."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"I know that the product is incredibly expensive."
"While Microsoft Defender for Office 365 necessitates pricier E3 or E5 subscriptions, the extensive functionality offered by these licenses across various Microsoft products justifies the investment."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
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Top Industries

By visitors reading reviews
Construction Company
18%
Comms Service Provider
10%
Financial Services Firm
9%
Outsourcing Company
8%
Construction Company
10%
Computer Software Company
10%
Financial Services Firm
9%
Comms Service Provider
8%
Computer Software Company
11%
Manufacturing Company
9%
Financial Services Firm
9%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise1
Large Enterprise12
By reviewers
Company SizeCount
Small Business7
Midsize Enterprise8
Large Enterprise6
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
 

Questions from the Community

What needs improvement with Cloudflare Zero Trust Platform?
In my opinion, Cloudflare One can be improved mainly through compatibility, as the integration should be much simpler...
What is your primary use case for Cloudflare Zero Trust Platform?
Cloudflare One's primary use case for my organization is to protect servers and to provide remote access with the VPN...
Ask a question
Earn 20 points
What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
My experience with pricing, setup, and licensing is that it's actually quite reasonable even on the licensing side as...
What needs improvement with Microsoft Defender for Office 365?
I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking ...
What is your primary use case for Microsoft Defender for Office 365?
My main use cases for Microsoft Defender for Office 365 include email hygiene.
 

Also Known As

Cloudflare Area 1 Email Security, Cloudflare Bot Management, Cloudflare Gateway, Cloudflare Zero Trust Platform, Cloudflare DDoS, Cloudflare SASE & SSE Platform
No data available
MS Defender for Office 365
 

Overview

 

Sample Customers

23andMe
Bethel School District, ServiceSource, Capital Caring
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about Avanan vs. Microsoft Defender for Office 365 and other solutions. Updated: June 2026.
906,852 professionals have used our research since 2012.