Kiteworks vs Mimecast Advanced Email Security comparison

Why PeerSpot?

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 8.6. Kiteworks holds a 2.2% mindshare in SEG, compared to Mimecast’s 14.1% mindshare. Additionally, 100% of Kiteworks users are willing to recommend the solution, compared to 91% of Mimecast users who would recommend it.

Kiteworks

Read 13 Kiteworks reviews

5,974 Views
358 Comparison Views

100% willing to recommend

Mimecast Advanced Email Sec...

Read 48 Mimecast Advanced Email Security reviews

10,994 Views
3,078 Comparison Views

91% willing to recommend

Kiteworks

Mimecast Advanced Email Sec...

Comparison Buyer's Guide

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Executive SummaryUpdated on Jun 2, 2026

Kiteworks and Mimecast Advanced Email Security compete in data security. Mimecast typically has the upper hand due to its comprehensive features and superior email threat defense, which justify the higher cost.

Features: Kiteworks focuses on secure file transfers, compliance management, and data sovereignty. Mimecast Advanced Email Security offers advanced threat protection, identity verification, and phishing prevention, providing robust email-centric security features.

Room for Improvement: Kiteworks could enhance its advanced threat detection, fortify phishing protection, and expand identity verification. Mimecast Advanced Email Security might focus on streamlining deployment, enhancing file transfer security, and improving the user interface.

Ease of Deployment and Customer Service: Kiteworks offers a straightforward deployment process with responsive customer service, easing system integration. Mimecast presents a complex deployment but delivers extensive customer support and resources. This results in a trade-off between ease and comprehensive support.

Pricing and ROI: Kiteworks is praised for competitive pricing and solid ROI, appealing to budget-conscious organizations. Mimecast's higher pricing reflects its enhanced email security, offering high ROI for companies focused on secure email communication.

To learn more, read our detailed Kiteworks vs. Mimecast Advanced Email Security Report (Updated: September 2026).

Buyer's Guide

Kiteworks vs. Mimecast Advanced Email Security

September 2026

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Helped 913,076 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 Email Security

27th

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 (16th), Managed File Transfer (MFT) (7th), Content Collaboration Platforms (14th)

Mimecast Advanced Email Sec...

Ranking in Email Security

5th

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), Office 365 Protection (2nd)

Mindshare comparison

As of September 2026, in the Secure Email Gateway (SEG) category, the mindshare of Kiteworks is 2.2%, up from 0.9% compared to the previous year. The mindshare of Mimecast Advanced Email Security is 14.1%, up from 12.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Secure Email Gateway (SEG) Mindshare Distribution
Product	Mindshare (%)
Mimecast Advanced Email Security	14.1%
Kiteworks	2.2%
Other	83.7%

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

Avinash Mishra

Manager - EUC at Finthrive

Advanced email filtering has blocked massive spam volumes and prevents unauthorized data leaks

Improvements for Mimecast Advanced Email Security include enhancing the user interface and accessibility, particularly regarding admin capabilities to add or modify user accounts. Streamlining this could improve overall usability and security management for users. Reporting is another area needing improvement in Mimecast Advanced Email Security, as the reports provided are not very easy to decipher. With artificial intelligence being integrated into various tools including Mimecast Advanced Email Security, I believe there is potential to enhance functionality, enabling users to ask specific questions and retrieve concise answers instead of overwhelming data. I choose a nine for Mimecast Advanced Email Security because improvements such as better user interface and artificial intelligence integration features would greatly enhance its usability. While no tool is perfect, these adjustments could greatly elevate Mimecast Advanced Email Security's capabilities.

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

"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 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 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."

"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."

"The solution removes the limitations with file attachment size that is found with regular email."

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

More Kiteworks pros

"If you want the ease of use, then Mimecast, or at least a cloud solution, is the way to go."

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

"Mimecast Advanced Email Security has state-of-the-art features and is very sophisticated compared to other partners."

"Mimecast has been in the market for a long time; it's a good tool if you want to simplify your operations and a good tool for removing on-prem appliances that otherwise you would need to do with the protection that Mimecast provides."

"Mimecast has some good support services in place."

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

"It's really quite user-friendly. In terms of technical superiority and the product itself, there are no complaints. It is really cutting edge."

"Due to our specialized use case, that HIPAA dictionary really comes in handy."

More Mimecast Advanced Email Security pros

Cons

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

"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."

"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."

"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."

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

"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."

More Kiteworks cons

"For improvement, I would say some of the catalogs, while navigating, were a little tricky."

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

"The feature that should be included is to remove the block on the encrypted files."

"External security features need improvement."

"It analyzes patterns but sometimes overlooks suspicious indicators."

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

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

"The solution is expensive in comparison to similar solutions."

More Mimecast Advanced Email Security 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."

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

"The price of Kiteworks is reasonable."

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

"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."

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

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

"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."

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

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

"The solution is expensive."

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

"The product has good pricing in terms of return on investment."

More Mimecast Advanced Email Security pricing and cost advice

See which vendors are best for you

Use our free recommendation engine to learn which Secure Email Gateway (SEG) solutions are best for your needs.

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Top Industries

By visitors reading reviews

Financial Services Firm

12%

Comms Service Provider

11%

Government

10%

Manufacturing Company

Outsourcing Company

10%

Computer Software Company

10%

Financial Services Firm

Construction Company

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	20
Midsize Enterprise	13
Large Enterprise	23

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...

See all answers

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...

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

What is your primary use case for Mimecast Email Security with Targeted Threat Protection?

I have been working with Mimecast Email Security.

See all answers

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Compared 5% of the time

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Compared 13% of the time

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Compared 8% of the time

Microsoft Defender for Office 365 vs Mimecast Advanced Email Security

Compared 5% of the time

Barracuda Email Protection vs Mimecast Advanced Email Security

Compared 5% of the time

Barracuda Email Security Gateway vs Mimecast Advanced Email Security

Compared 3% of the time

More Mimecast Advanced Email Security Competitors

Product Reports

Buyer's Guide

Kiteworks

September 2026

Download Kiteworks product report

Buyer's Guide

Mimecast Advanced Email Security

August 2026

Download Mimecast Advanced Email Security product report

Also Known As

Accellion

Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Email and Collaboration Threat Protection

Overview

Kiteworks provides secure enterprise file sharing with mobile access and collaboration tools, supporting up to 100 GB transfers. It ensures data safety with encryption and offers a smooth interface for independent data management.

Kiteworks is tailored for effective large-scale data transfers using SFTP, email, and web. It supports two-factor authentication, antivirus scanning, and seamless integration with SSO to minimize administrative tasks. Users benefit from a centralized platform that offers visibility and control over data exchanges, receiving activity notifications and managing encryption keys independently. Despite its strengths, technical support and interface stability need improvement, along with the introduction of automated LDAP syncing and expanded knowledge resources.

What features make Kiteworks stand out?

Mobile Access: Facilitates secure data handling on-the-go.
Enterprise File Sharing: Enables large file transfers with up to 100 GB limit.
Collaboration Tools: Streamlines team efforts and file sharing.
Enhanced Security: Includes two-factor authentication and antivirus scanning.
SSO Integration: Reduces administrative tasks for efficient user management.

What ROI benefits should users seek in reviews?

Data Security: High level of encryption ensures sensitive data protection.
Efficient Management: Independent data handling and activity alerts improve workflow.
Administrative Ease: SSO and centralized logs simplify oversight and reduce complexity.

Organizations in sectors like healthcare and finance utilize Kiteworks to securely share and transfer sensitive data, from medical records to credit card information, ensuring compliance and data integrity. Industries benefit from its automated data transfer and secure communication capabilities, critical for operations ranging from air quality monitoring to banking transactions.

Kiteworks

Mimecast Email Security protects organizations against phishing, malware, business email compromise, and impersonation attacks, with detection built on 20 years of experience and over 1.3 billion emails inspected daily. It's available as a secure email gateway (MX-based) for full control over complex, multi-region environments, or via API integration with Microsoft 365, which deploys in hours with no MX changes. Administrators get a single console for policy management, monitoring external communications, and customizing configurations, and can pair it with Mimecast Cloud Archive for long-term email retention and compliance.

What key features should users explore?

Sandboxing: Full emulation sandboxing and AI-driven static analysis detect threats in attachments before delivery.
Spam and Phishing Protection: Multi-layered detection catches both payload-based attacks and payloadless, socially-engineered BEC attempts.
URL Inspection: Computer Vision AI analyzes destination pages to catch phishing and brand impersonation.
API Deployment Option: Deploys in hours without MX or mail flow changes, with 30-day historical scanning to show threats your current defenses missed.
Email Archiving (via Cloud Archive): Secure long-term storage supporting compliance needs.

What benefits can impact ROI?

Regulatory Compliance: Supports adherence to standards like HIPAA through retention and monitoring.
Integration: Deep integration with Microsoft 365, deployable as a gateway or via API depending on your environment.
Rapid Time to Value: API deployment proves protection value in hours, before any infrastructure commitment.
Threat Prevention: Detection engines refined daily against 1.3 billion emails, trusted by 42,000 customers globally.

Industries and use cases

Mimecast Email Security is used across industries, including healthcare and finance, to secure inbound and outbound communications and support compliance requirements. Enterprises use it as a gateway, an API-based layer on top of Microsoft 365, or both, depending on how much control versus deployment speed they need.

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

Hewlett-Packard Company (HP), Cushman and Wakefield, PIB Group, Swissport

Buyer's Guide

Kiteworks vs. Mimecast Advanced Email Security

September 2026

Free Report: Kiteworks vs. Mimecast Advanced Email Security

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We monitor all Secure Email Gateway (SEG) reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.