Kiteworks vs Mimecast Advanced Email Security comparison

Kiteworks and Mimecast are both solutions in the Secure Email Gateway (SEG) category. Kiteworks is ranked #10 with an average rating of 8.0, while Mimecast is ranked #4 with an average rating of 8.5. Kiteworks holds a 0.7% mindshare in SEG, compared to Mimecast’s 16.5% mindshare. Additionally, 100% of Kiteworks users are willing to recommend the solution, compared to 93% of Mimecast users who would recommend it.

Kiteworks

Read 13 Kiteworks reviews

3,236 Views
97 Comparison Views

100% willing to recommend

Mimecast Advanced Email Sec...

Read 31 Mimecast Advanced Email Security reviews

5,792 Views
1,969 Comparison Views

93% willing to recommend

Kiteworks

Mimecast Advanced Email Sec...

Comparison Buyer's Guide

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Executive SummaryUpdated on Feb 4, 2026

Kiteworks and Mimecast Advanced Email Security compete in the email security and communication management category. Mimecast Advanced Email Security seems to have an upper hand due to its comprehensive feature set offering robust protection capabilities.

Features: Kiteworks emphasizes secure communications with streamlined compliance management, user collaboration, and sharing capabilities. Mimecast Advanced Email Security focuses on advanced threat protection, email archiving, and continuity services, prioritizing cybersecurity and email integrity.

Room for Improvement: Kiteworks could enhance features related to file access control and reporting granularity. Improving user interface flexibility could also be beneficial. Mimecast Advanced Email Security could work on simplifying some aspects of customization and enhancing user training resources. Addressing feedback on interface complexity might improve user satisfaction.

Ease of Deployment and Customer Service: Kiteworks offers a straightforward deployment model with supportive services enabling rapid adaptation. Mimecast Advanced Email Security provides seamless deployment with detailed documentation and dedicated support. While both products offer efficient integration, Kiteworks' support services are noted for their responsiveness.

Pricing and ROI: Kiteworks is recognized for cost efficiency and appealing ROI, fitting budget-conscious organizations. Mimecast Advanced Email Security, although pricier, is seen as offering good ROI because of its extensive features and security capabilities. Despite higher costs, its value justifies the greater initial investment for feature-rich solutions.

To learn more, read our detailed Kiteworks vs. Mimecast Advanced Email Security Report (Updated: December 2025).

Buyer's Guide

Kiteworks vs. Mimecast Advanced Email Security

December 2025

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Helped 881,707 peers since 2012

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 Secure Email Gateway (SEG)

10th

Average Rating

8.6

Reviews Sentiment

6.9

Number of Reviews

Ranking in other categories

Enterprise Content Management (16th), Email Security (29th), Managed File Transfer (MFT) (5th), Content Collaboration Platforms (13th)

Mimecast Advanced Email Sec...

Ranking in Secure Email Gateway (SEG)

4th

Average Rating

8.0

Reviews Sentiment

5.9

Number of Reviews

Ranking in other categories

Office 365 Protection (3rd)

Mindshare comparison

As of February 2026, in the Secure Email Gateway (SEG) category, the mindshare of Kiteworks is 0.7%, up from 0.5% compared to the previous year. The mindshare of Mimecast Advanced Email Security is 16.5%, up from 11.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Secure Email Gateway (SEG) Market Share Distribution
Product	Market Share (%)
Mimecast Advanced Email Security	16.5%
Kiteworks	0.7%
Other	82.8%

Secure Email Gateway (SEG)

Featured Reviews

KishoreT-Review

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.

Read full review

Test Logix

Email Security Engineer at Logic Infosecurity

Experience high detection and user-friendly policies with reliable email security implementation

The system is not user-friendly because you have to create policies that are mapped in a dictionary. As an IT engineer, I understand how it works, but explaining it to another IT person can be difficult. Having more user-friendly dashboards would improve the work experience. In Mimecast Email Security, checking policies in the dictionary or gateway is very complicated, and not everyone understands this process. If you examine the Check Point portal, it's user-friendly with easily accessible tabs that anyone can explore. With Mimecast Email Security, making changes might impact existing mailboxes. The portal is complicated compared to Check Point's user-friendly interface.

Read full review

Quotes from Members

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

Pros

"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."

"The most valuable aspect of Kiteworks is undoubtedly the private content network. This feature is particularly beneficial for us. Furthermore, it serves as a centralized platform that enables us to track and manage our information exchange."

"I like Kiteworks or Accellion because it's continuously upgraded. I also know that it probably works with a lot of clients."

"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."

"We can see when people are sending things. We can definitely see who is sending to whom. From the administrative logs, we can see who is sending to an outside entity, and those logs are retained for quite a while."

"We could see whether the customer with whom we shared a file had downloaded it, which was not available with GitHub."

"The benefits that Kiteworks has provided to its customers in terms of data sovereignty."

"Scalability is impressive."

More Kiteworks pros

"We like the content filtering and secure messaging features."

"Email security is the most valuable feature of the solution."

"I would rate Mimecast Email Security a nine out of ten."

"In terms of efficacy, Proofpoint is better than Mimecast, though it's a little difficult to manage."

"It offers an easy initial setup."

"It's good, it keeps the spam out."

"It does a good job for us, and its admin console is easy to use."

"The product is good. To date, we have not faced any challenges."

More Mimecast Advanced Email Security pros

Cons

"File location could be improved."

"In my experience, their technical support can be a little slow."

"Kiteworks could benefit from enhancing the proposal knowledge base section, specifically regarding the type of work involved. Currently, the knowledge base seems insufficiently dedicated to this topic, making it challenging for new users to access the relevant administrative law. Improving the visual aids and providing clearer explanations could alleviate this issue."

"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."

"We have experienced a few hiccups and bugs when using the admin console and from a user perspective."

"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."

"There are always issues when there are bugs or upgrades. The challenge with upgrading is getting more storage from the customer. Every time we have a new version, it requires additional storage. This means that the customer would need to procure more storage for their server, which they don't like because it means additional cost to them. So, I think my request would be that the version upgrades don't require any significant storage requirement."

More Kiteworks cons

"The solution is complex and not easy to use."

"As a user, the user interface of the management console could be upgraded, for example."

"Many of our users complain that the system is blocking too many attachments. It's a good practice from a security perspective, but our users think Mimecast is doing too much. It might be something we'll have to adjust."

"I did have a problem with Mimecast. That is why I was looking for an alternative solution because their sender IP address gets poorly rated by Microsoft."

"They could provide a unified licensing model, including all the security features."

"I'd like to have better support from the product in the future."

"Mimecast need to ensure that the body text format is correctly handled and that images are properly embedded in the body text."

"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."

More Mimecast Advanced Email Security cons

Pricing and Cost Advice

"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."

"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."

"It is not really expensive. I mean, to me it's obviously expensive, but it's worth 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."

"The solution is expensive."

"It's an expensive solution."

"For what it is, the product is overpriced."

"It is a bit expensive."

"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."

"The licensing costs are per-user for the product that you get with them."

"The product price is moderate. I rate the pricing a five out of ten."

"The customers can select the license packages as per their requirements."

More Mimecast Advanced Email Security pricing and cost advice

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Top Industries

By visitors reading reviews

Government

13%

Financial Services Firm

12%

Healthcare Company

Comms Service Provider

Computer Software Company

14%

Financial Services Firm

Manufacturing Company

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	3
Large Enterprise	11

By reviewers
Company Size	Count
Small Business	17
Midsize Enterprise	7
Large Enterprise	11

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...

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What needs improvement with Kiteworks?

See all answers

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...

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What do you like most about Mimecast Email Security with Targeted Threat Protection?

The interface of this solution is very easy to navigate and user-friendly. There is no delivery in email and other communications, making it reliable. The configuration is relatively easy.

See all answers

What is your experience regarding pricing and costs for Mimecast Email Security with Targeted Threat Protection?

Do you know anything about the pricing and cost of the Mimecast Email Security?

See all answers

What needs improvement with Mimecast Email Security with Targeted Threat Protection?

There is room for improvement since new threats are emerging. Considering the availability of new features would be worthwhile. Mimecast Email Security is somewhat expensive compared to the competi...

See all answers

Comparisons

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Compared 8% of the time

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Compared 7% of the time

FileCloud vs Kiteworks

Compared 5% of the time

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Compared 22% of the time

Microsoft Defender for Office 365 vs Mimecast Advanced Email Security

Compared 12% of the time

Proofpoint Email Protection vs Mimecast Advanced Email Security

Compared 11% of the time

Barracuda Email Protection vs Mimecast Advanced Email Security

Compared 6% of the time

Abnormal Security vs Mimecast Advanced Email Security

Compared 5% of the time

More Mimecast Advanced Email Security Competitors

Product Reports

Buyer's Guide

Kiteworks

January 2026

Download Kiteworks product report

Buyer's Guide

Mimecast Advanced Email Security

January 2026

Download Mimecast Advanced Email Security product report

Also Known As

Accellion

Mimecast Email Security with Targeted Threat Protection

Overview

Kiteworks empowers organizations to effectively manage risk in every send, share, receive, and save of sensitive content over numerous communications channels: email, file sharing, managed file transfer, APIs, and web forms. The Kiteworks platform unifies, tracks, controls, and secures sensitive content moving within, into, and out of an organization, significantly improving risk management and ensuring regulatory compliance.

Kiteworks

Mimecast Advanced Email Security provides essential features like spam filtering, email archiving, and threat remediation, enhancing email protection. Its integration with Microsoft 365 and user-friendly administration console improve usability while blocking phishing and imposter attacks.

Mimecast Advanced Email Security is an important tool for organizations combating email threats such as phishing and malicious attachments. Acting as a cloud-based email gateway, it delivers threat protection and email archiving while supporting compliance requirements like HIPAA. Features such as URL inspection, identity protection, impersonation policies, and DMARC Analyzer ensure robust security. Despite its comprehensive capabilities, users find pricing high with room for improvement in detection rates and interface simplification. Additionally, blocking flexibility and outbound mail server blocklisting challenges signal areas for enhancement.

What are the key features?

Spam Filtering: Effective at blocking spam and maintaining inbox cleanliness.
Email Archiving: Provides secure storage of emails for compliance and retrieval.
Sandboxing: Safely tests attachments and links before delivery.
Threat Remediation: Responds to detected threats swiftly across the network.
URL Inspection: Analyzes links for harmful content to prevent phishing.

What benefits can organizations expect?

Scalability: Suitable for both large enterprises and smaller clients enhancing network safety.
Customization: Offers advanced features tailoring to specific needs.
Integration: Seamlessly integrates with Microsoft 365, enhancing operational efficiency.
Performance: Reliably prevents malicious threats ensuring email security.

Mimecast Advanced Email Security is deployed across industries like healthcare, finance, and legal sectors where email threats are prevalent. Companies leverage phishing detection, data compliance, and behavior analysis with ease due to its scalable and cloud-based capabilities. Its robust features support enhanced protection and communication integrity.

Mimecast

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

Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group

Buyer's Guide

Kiteworks vs. Mimecast Advanced Email Security

December 2025

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