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Kiteworks vs Microsoft Defender for Office 365 comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Dec 3, 2024

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

Kiteworks
Ranking in Email Security
27th
Ranking in Secure Email Gateway (SEG)
9th
Average Rating
8.6
Reviews Sentiment
6.9
Number of Reviews
13
Ranking in other categories
Enterprise Content Management (16th), Managed File Transfer (MFT) (7th), Content Collaboration Platforms (14th)
Microsoft Defender for Offi...
Ranking in Email Security
2nd
Ranking in Secure Email Gateway (SEG)
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)
 

Mindshare comparison

As of September 2026, in the Email Security category, the mindshare of Kiteworks is 0.8%, up from 0.5% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 5.2%, down from 11.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3655.2%
Kiteworks0.8%
Other94.0%
Email Security
 

Featured Reviews

KT
Associate Consultant at a tech consulting company with 10,001+ employees
Streamlined global file sharing with user-friendly interface and self-service capabilities
I'm not a network expert, however, there must be some room for improvement. Perhaps there could be a notification to users about their bandwidth or network packet loss. If users receive such notifications, they can understand any disruptions are due to issues with their network or bandwidth rather than the site or Kiteworks. Additionally, I work from offshore India, and I told my client manager to communicate with the Kiteworks forum salesman regarding one feature. I noticed the Kiteworks login UI is very basic, lacking customization. Allowing more HTML tags to add hyperlinks or user-friendly information on the home page would be very useful.
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

"As a file-sharing application, it's an absolute 10 out of 10."
"The most valuable feature is the ability to allow end-users to manage their own information and data with minimal administration. That's the best feature from my perspective."
"The solution can be used remotely, including from mobiles, and it's easy to upload and share files."
"The most valuable feature is the ability to send a large file of 30 GB in size and more. In Outlook and other email applications, you cannot send files that are larger than 20 MB. But with Kiteworks, 30 GB is transferable by default and, with the proper approval, a file of up to 100 GB can be sent. It makes file transfer very easy and smooth."
"I can identify from which region our users are uploading or downloading files."
"The best part of this solution is that we can generate multiple reports about how the data is transferred and about user information or IP."
"The top two features are the two-factor authentication, which is pretty good. It's easily understood by the users. And their API is rather robust. We have numerous integrations that work off the API."
"We could see whether the customer with whom we shared a file had downloaded it, which was not available with GitHub."
"Microsoft Defender for Office 365 facilitates efficient management and updates through the cloud. We do not have to worry about incompatibilities. It just works."
"The benefit that stands out to me is the ability for multiple individuals to collaborate simultaneously within the same document. Additionally, there is the option to save the document directly in the integrated OneDrive or SharePoint."
"One of the best features of the tool is its capability to aggregate insights from different workloads, basically from the Office 365 and endpoints part."
"The two main features that prove most beneficial for us are URL scanning and attachment scanning."
"Microsoft so far has been good; we haven't faced any kind of disruption or anything else, it's a good product and good platform, I must say, and overall it's a good product and good service and we haven't dealt with bugs or glitches."
"My experience deploying Microsoft Defender for Office 365 was seamless."
"The email protection is excellent, especially in terms of anti-phishing policies."
"The basic features are okay and I'm satisfied with the Defender."
 

Cons

"Perhaps there could be a notification to users about their bandwidth or network packet loss."
"I noticed the Kiteworks login UI is very basic, lacking customization. Allowing more HTML tags to add hyperlinks or user-friendly information on the home page would be very useful."
"It would be nice if Kiteworks could provide a free version of the platform so that it could be used for a certain number of file transfers. We could be charged a fee if we exceeded the number of allotted file transfers."
"There is one particular thing that is a nuisance."
"There is no offboarding process for end-users in Kiteworks. It's a manual process. There is no automated syncing with LDAP and checking to see if the account is still active. It's a manual process to get people out of here, which isn't the best way."
"The system is extremely stable, but because it is a "COTS" system access is restricted and you must use the solution's support to make even simple changes, which increases the downtime."
"I would like to see immediate releases of fixes because now it takes at least a week. If that time span can be reduced to one day or two days, that would be very helpful for users so that things are sorted and transactions work smoothly."
"We mainly had stability issues with kiteworks, where we were pushing the limits of its capability."
"The phishing and spam filters could use some improvement."
"Several simulation options are available within 365, and the phishing simulation could be better."
"It would be better if it were more scalable. It depends on the architecture, but we would like to make it more scalable for both data centers."
"The custom alerts have to improve a lot."
"The UI needs to be more user-friendly."
"In some situations, it has not been able to pick impersonated emails having no attachments. Technical support definitely has a scope for improvement."
"I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking for malware."
"The changes to customer service, specifically the new model for support agreements, are not favorable."
 

Pricing and Cost Advice

"The solution is very expensive because we are buying with Malaysian Ringgit and it's sold in US dollars."
"The price of Kiteworks is reasonable."
"They changed it midstream. We were being charged a certain flat rate for SFTP traffic. For whatever reason, at the beginning of the year, our pricing changed, and we are now being charged more for using a feature of the product than we were when we first bought it. That has been our experience with billing. It turned out to be more expensive than when we started with it."
"The license management is changing and confusing. If I could make one change to it, it would be better license management through the API."
"I believe it's a little costly, but given the faith that we put into it from a security perspective to maintain the integrity of our patient information that is being transferred through this system, that's a small price to pay. So, on the surface, it might look like a lot of money, but depending on the need for security, which is where we feel it shines, it's okay price-wise."
"It is not really expensive. I mean, to me it's obviously expensive, but it's worth it."
"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."
"The solution could be better by simplifying the business model of their licensing. It was hard to figure out how to get the licensing done for the environment, initially."
"Defender is a little bit more expensive as compared to others. We are in the manufacturing environment. So, we don't have a high budget for all of our endpoint devices. Its cost is a major concern for us."
"The license is expensive because the cost is based on the number of users."
"The product is expensive."
"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 pricing has become expensive."
"It's a user-base subscription."
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Top Industries

By visitors reading reviews
Financial Services Firm
12%
Comms Service Provider
11%
Government
10%
Manufacturing Company
8%
Computer Software Company
11%
Manufacturing Company
10%
Financial Services Firm
9%
Comms Service Provider
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business3
Large Enterprise11
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
 

Questions from the Community

What is Kiteworks?
Kiteworks is a secured file sharing platform that enables users to collaborate with different parties across a robust offering of secured protected channels. Users have the option of virtual privat...
What needs improvement with Kiteworks?
I'm not a network expert, however, there must be some room for improvement. Perhaps there could be a notification to users about their bandwidth or network packet loss. If users receive such notifi...
What advice do you have for others considering Kiteworks?
Scalability is impressive. It can be highly available, resilient, and scalable infrastructure. I can confidently give it a nine. It suits any level of organization, whether a small setup with two a...
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 a standalone product. It's very competitive compared to what competitors are ch...
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 for malware. We are seeing a lot more malware-less emails that Defender for Offi...
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

Accellion
MS Defender for Office 365
 

Overview

 

Sample Customers

United States Securities and Exchange Commission, National Health Service, Husch Blackwell LLP, NYC Health + Hospitals, Viatris, MITRE Corporation, Chubb, Kraft Heinz, KPMG, Kohler, National Institute of Standards and Technology, Purdue Pharma, AVL
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about Kiteworks vs. Microsoft Defender for Office 365 and other solutions. Updated: September 2026.
913,683 professionals have used our research since 2012.