Kiteworks vs Mimecast Email and Collaboration Threat Protection comparison

Kiteworks and Mimecast are both solutions in the Secure Email Gateway (SEG) category. Kiteworks is ranked #9 with an average rating of 8.0, while Mimecast is ranked #3 with an average rating of 8.3. Kiteworks holds a 0.7% mindshare in SEG, compared to Mimecast’s 17.1% mindshare. Additionally, 100% of Kiteworks users are willing to recommend the solution, compared to 92% of Mimecast users who would recommend it.

Kiteworks

Read 13 Kiteworks reviews

3,471 Views
104 Comparison Views

100% willing to recommend

Mimecast Email and Collabor...

Read 39 Mimecast Email and Collaboration Threat Protection reviews

6,951 Views
2,224 Comparison Views

92% willing to recommend

Kiteworks

Mimecast Email and Collabor...

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Executive SummaryUpdated on Feb 11, 2026

Kiteworks and Mimecast Advanced Email Security are both competitive solutions in the secure communication space. Kiteworks holds the upper hand in user-friendly collaboration and data protection, while Mimecast is preferred for its comprehensive threat prevention features.

Features: Kiteworks stands out for secure file sharing, regulatory compliance, and seamless collaboration tools. Mimecast is recognized for its email security through robust threat intelligence, ransomware protection, and advanced email threat mitigation capabilities.

Room for Improvement: Kiteworks could enhance its mobile access, provide better insights into external sharing, and improve its administrative controls. Mimecast could focus on making its setup process more user-friendly, integrate more seamlessly with third-party platforms, and expand its reporting capabilities to offer deeper insights.

Ease of Deployment and Customer Service: Kiteworks offers a straightforward deployment focused on seamless integration and reliable support. Mimecast provides a straightforward cloud-based deployment with commendable scalability and well-structured training resources.

Pricing and ROI: Kiteworks offers cost-effective solutions with promising ROI due to its pricing model. Mimecast, while higher in cost, offers substantial ROI through its extensive threat prevention capabilities, justifying the investment in enhanced security.

To learn more, read our detailed Kiteworks vs. Mimecast Email and Collaboration Threat Protection Report (Updated: February 2026).

Buyer's Guide

Kiteworks vs. Mimecast Email and Collaboration Threat Protection

February 2026

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Helped 885,264 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)

9th

Average Rating

8.6

Reviews Sentiment

6.9

Number of Reviews

Ranking in other categories

Enterprise Content Management (15th), Email Security (25th), Managed File Transfer (MFT) (5th), Content Collaboration Platforms (13th)

Mimecast Email and Collabor...

Ranking in Secure Email Gateway (SEG)

3rd

Average Rating

8.0

Reviews Sentiment

5.9

Number of Reviews

Ranking in other categories

Email Archiving (2nd), Secure Web Gateways (SWG) (19th), Office 365 Protection (2nd)

Mindshare comparison

As of March 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 Email and Collaboration Threat Protection is 17.1%, up from 11.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Secure Email Gateway (SEG) Mindshare Distribution
Product	Mindshare (%)
Mimecast Email and Collaboration Threat Protection	17.1%
Kiteworks	0.7%
Other	82.2%

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.

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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

"It’s a great product that you should seriously consider and take the first step by training."

"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."

"Scalability is impressive."

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

"Kiteworks is easy to manage and maintain with a user-friendly interface and I recommend it to anyone that requires a file-sharing system that supports SFTP."

"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 useful feature of this solution is to share files with external parties and we can use this functionality to share files internally too."

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

More Kiteworks pros

"Mimecast Mailbox Continuity helps companies continue to move."

"The initial setup is very straightforward."

"Based on overall experience, Mimecast Email Security is the best solution for traditional gateways."

"It's good, it keeps the spam out, and it does a really good job at not allowing threats through."

"The solution is pretty straightforward to use and easy to set up."

"My advice to those considering this product would be to go for it."

"It has all the features required for distribution, such as the ability to mail."

"I have always found Mimecast to be very responsive; for example, if we see something come through, they address it and it helps to sort out the issues."

More Mimecast Email and Collaboration Threat Protection pros

Cons

"It could be more stable. In the next release, it would be better if it was more stable with improved performance."

"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."

"File location could be improved."

"There is one particular thing that is a nuisance."

"The one feature, which I have also requested directly to Kiteworks, is to have a scheduled upgrade function. Currently, one of my engineers logs in after hours for the upgrade. We're a hospital, and we're 24/7, but the primary users are seven to five. So, we log in the early evening just to push a button to tell it to do the update. It would be nice if that could be very easily scheduled."

"We have experienced some issues with stability due to bugs."

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

"We mainly had stability issues with kiteworks, where we were pushing the limits of its capability."

More Kiteworks cons

"External security features need improvement."

"The detection rates are an area for improvement."

"The price of the solution is expensive. It can improve by reducing the price."

"The installation is not so straightforward."

"The attachment scanning feature doesn't work properly."

"We have subscribed to an archival service, and yet, when we have to get our data out, we have to pay a fee to get our own data."

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

"Mimecast needs to reduce the number of false positive emails; a big pain point for us."

More Mimecast Email and Collaboration Threat Protection cons

Pricing and Cost Advice

"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."

"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 solution is very expensive because we are buying with Malaysian Ringgit and it's sold in US dollars."

"The price of Kiteworks is reasonable."

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

"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the pricing a ten."

"Compared to the other products in the market, it is neither cheap but nor very expensive. I would rate it somewhere in the middle, 5 out of 10."

"Its price is in the middle range. It is a structured licensing model where there are various components that you can add or choose to add or not."

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

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

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

"The price of Mimecast Mailbox Continuity is expensive."

"Two subscription options are currently offered: monthly and yearly. My suggestion is to opt for the yearly subscription as it can give some discount. The pricing isn't high as other cloud solutions are pricier than Microsoft's offerings."

More Mimecast Email and Collaboration Threat Protection pricing and cost advice

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Top Industries

By visitors reading reviews

Government

13%

Financial Services Firm

12%

Comms Service Provider

Retailer

Computer Software Company

12%

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	19
Midsize Enterprise	11
Large Enterprise	13

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?

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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

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Product Reports

Buyer's Guide

Kiteworks

March 2026

Download Kiteworks product report

Buyer's Guide

Mimecast Email and Collaboration Threat Protection

March 2026

Mimecast Email and Collaboration Threat Protection report

Download Mimecast Email and Collaboration Threat Protection product report

Also Known As

Accellion

Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Mimecast Advanced Email Security

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 offers advanced features like sandboxing, email archiving, and phishing protection. It's known for integration with Microsoft 365 and user-friendly admin management, making it a robust choice for secure communications.

Focused on safeguarding emails, Mimecast Advanced Email Security integrates seamlessly with Microsoft 365, providing features such as sandboxing, spam filtering, and email archiving. It delivers comprehensive protection against phishing, identity threats, and impersonation attempts. Administrators benefit from the ability to monitor external communications and customize configurations, enhancing email security. Users appreciate the intuitive admin console and responsive support team. Although it faces challenges in threat detection rates and administration complexity, its capabilities in email monitoring, spam filtering, and URL inspection remain valued by enterprises seeking reliable email security that supports compliance needs.

What key features should users explore?

Sandboxing: Analyzes attachments in a secure environment to detect threats.
Email Archiving: Provides secure long-term storage of emails for compliance.
Spam Filtering: Prevents unsolicited emails from clogging the inbox.
URL Inspection: Checks links in emails for malicious content.
Phishing Protection: Guards against deceptive tactics to protect sensitive data.

What benefits can impact ROI?

Regulatory Compliance: Facilitates adherence to standards such as HIPAA.
Integration: Enhances existing systems with seamless Microsoft 365 integration.
Support: Offers a responsive support team to resolve issues promptly.
Email Security: Improves threat prevention with effective spam and phishing protections.

Mimecast Advanced Email Security is implemented across industries to protect against email threats like phishing, spam, and malicious attachments. It serves as both a gateway and an archiving tool, supporting compliance in healthcare and finance by offering features like URL protection and data loss prevention. Enterprises leverage its capabilities to secure inbound and outbound communications effectively.

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 Email and Collaboration Threat Protection

February 2026

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