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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) (12th), Data Loss Prevention (DLP) (22nd), Cloud Access Security Brokers (CASB) (12th), Distributed Denial-of-Service (DDoS) Protection (8th), Software Defined WAN (SD-WAN) Solutions (13th), Access Management (12th), Bot Management (3rd), ZTNA as a Service (8th), ZTNA (4th), Secure Access Service Edge (SASE) (9th), Remote Browser Isolation (RBI) (2nd)
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) (40th)
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 (9th), Secure Email Gateway (SEG) (2nd)
 

Mindshare comparison

As of August 2026, in the Email Security category, the mindshare of Cloudflare One is 1.7%, up from 1.4% compared to the previous year. The mindshare of Avanan is 1.9%, down from 3.4% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 5.7%, down from 11.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3655.7%
Cloudflare One1.7%
Avanan1.9%
Other90.7%
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 One has assisted in securing my remote workforce through a SASE solution with Cloudflare One and the Workers part, although I am not currently using the Workers component."
"The simplicity of the solution is its valuable features as almost no effort was needed to learn the configurations. It is also one of the cheapest firewalls available in this category."
"It's a perfect solution from my perspective; it's easy to understand and easy to configure."
"We mostly use Cloudflare WAF, and gets basic Cloudflaire DDoS, caching as extra bonus . We like the factor these features are all integrated into 1 console, simple to manage."
"It is a stable solution."
"The solution has different options that can be used to differentiate DDoS attacks."
"Cloudflare is simple to use."
"The best feature is rate limiting. If I'm expecting 500 visits per hour, Cloudflare will limit the requests if I suddenly get 50,000."
"Spam protection is the most valuable feature."
"The most valuable feature of Avanan is its effectiveness; when scanning incoming emails for threats it can, in an automated fashion, quarantine suspicious attachments."
"We are grateful for the solution and its great advances in connecting teams under a secure environment that cybercriminals cannot compromise."
"Avanan is a stable software. My company hasn't faced any issues, bugs, or problems with the performance of Avanan."
"Overall, compared to features, the cost is very reasonable and output of this tool is very good."
"Prevention of account takeover by ransomware attackers has solved long-term problems that had become normal in the company."
"It can retract unsafe emails and remove them from the entire communication channel."
"It is simple to deploy this platform and interact with the set features."
"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."
"Microsoft Defender for Office 365 has decreased my time to detection and time to respond by one hundred percent."
"It has helped us in improving our security posture; it detects any kind of attack or abnormal behavior in accessing the system and sends an alert to the administrator who can check, understand, and review on time to ensure that all activities are legit."
"The coolest feature of Microsoft Defender for Office 365 is its ability to look for phishing emails."
"My experience with customer support and technical support for Microsoft Defender for Office 365 has been excellent."
"Defender has reduced the time our security team spends on tasks by 10 to 15 percent, allowing us to focus on other areas."
"The good part is that you don't have to configure it, which is very convenient."
"Safe attachments, safe links, policies, and the ability to protect from zero-day threats are the most valuable features."
 

Cons

"Our customers no longer use Cloudflare because its service is subpar."
"There are premium tier live service and lower tier live service, so we opted for the lower tier. But there is no medium tier where we pay a little extra and get a bit more service. So if that can be improved."
"Cloudflare DDoS has poor technical support."
"The software has automated alerts, but the automated alerts are not available in the mobile app."
"I would like them to include a VPN feature to provide a secure connection to the data center."
"They don't have a person to provide support for customers using the solution under their free plan."
"The tool should provide on-premise versions. Currently, all versions are cloud-based."
"From a logging perspective, it is still a bit difficult to see exactly what users are being blocked with the current views."
"Email querying is not efficient throughout."
"The user experience must be improved."
"When sending bulky emails, the system slows down and takes a long time before it responds effectively to our requests."
"It should also offer a quick backup in case any email is wrongly quarantined or deleted to ensure no data loss."
"The customer service team could come up with clear tutorials on how to use this platform to help new teams."
"In Avanan, the email channel is one of the channels where data leakage happens, and they need to consider it from a DLP perspective."
"The cost is higher for SMEs, however, the pricing and billing criteria can be lessened to accommodate more willing customers."
"The response to new threats is sometimes slow and can lead to data compromise."
"The XDR dashboard has room for improvement."
"Sometimes I have to recategorize things when it takes the wrong step and I do not want it to classify something as suspicious."
"This product's effectiveness could be improved, in terms of detecting unwanted spam or even malware between the emails, compared to other products."
"I think that Microsoft Defender for Office 365 could be improved if it could use VirusTotal to compare the programs or anything that I download."
"The visibility into threats is not up to the mark, as I do not have control. I rate my experience with Microsoft Defender for Office 365 as six out of ten due to troubleshooting and pricing concerns."
"Specifically, within Microsoft Defender for Office 365, I want it to improve the DLP capabilities."
"The UI needs to be more user-friendly."
"We noticed that from time to time, Microsoft's stability does have problems. Sometimes the service goes up and down. Sometimes they change without prior notice."
 

Pricing and Cost Advice

"The solution's pricing lacks transparency."
"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."
"The pricing is somewhere in the middle. I would rate the pricing a seven 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 prices are slightly expensive."
"The solution is not that expensive."
"Cloudflare Zero Trust Platform's pricing is good."
"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."
"Avanan’s price is comparable to Barracuda."
"Good pricing arrangement as an SaaS offering."
"The product is not the cheapest in the market."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"The pricing is normal. Considering its popularity, it's not overpriced."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"Defender for 365 comes in various plans and licenses, along with other Microsoft security solutions. Purchasing this kind of package or security bundle gives good value for money, and that's what I recommend."
"The product is expensive."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"The product is very expensive."
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Top Industries

By visitors reading reviews
Construction Company
19%
Comms Service Provider
10%
Outsourcing Company
9%
Financial Services Firm
9%
Construction Company
10%
Computer Software Company
10%
Financial Services Firm
9%
Comms Service Provider
9%
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: August 2026.
908,344 professionals have used our research since 2012.