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Microsoft Purview Customer Lockbox vs Mimecast Email Security comparison

 

Comparison Buyer's Guide

Executive Summary

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

Microsoft Purview Customer ...
Ranking in Office 365 Protection
8th
Average Rating
9.0
Reviews Sentiment
7.9
Number of Reviews
1
Ranking in other categories
No ranking in other categories
Mimecast Email Security
Ranking in Office 365 Protection
3rd
Average Rating
8.0
Reviews Sentiment
6.2
Number of Reviews
31
Ranking in other categories
Secure Email Gateway (SEG) (4th)
 

Mindshare comparison

As of August 2025, in the Office 365 Protection category, the mindshare of Microsoft Purview Customer Lockbox is 1.0%, down from 2.6% compared to the previous year. The mindshare of Mimecast Email Security is 19.9%, up from 11.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Office 365 Protection
 

Featured Reviews

Mayeen Uddin - PeerSpot reviewer
Dashboard functionality and data processing offer value with an easy setup
We are using Microsoft Purview Customer Lockbox for email access The most important feature is data processing. I like the dashboard and the undo or multi-call feature of Microsoft Purview Customer Lockbox. The pricing for personal users is not cost-effective. It feels expensive for individual…
ShaheenKapery - PeerSpot reviewer
Provides valuable security features and has a straightforward setup process
The initial setup process is straightforward and takes a weekend at most. A .com domain can take up to forty-eight hours, while a local domain takes about four to eight hours because it has to propagate through the international DNS records. It is a cloud-only solution. If you're managing email security on-premises, you use your bandwidth to download emails, including spam, and then use your servers to clean it up. For example, say a third of your email is spam; this consumes significant bandwidth and resources. However, if you use Mimecast, they filter the emails on their servers before delivering them to you. It can be a major selling point in regions with expensive bandwidth, such as Africa. You can save bandwidth and improve overall efficiency by offloading the spam filtering to Mimecast.

Quotes from Members

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

Pros

"The most important feature is data processing."
"Mimecast certainly helped my customers reduce phishing emails."
"In the current environment that the world is in, everyone is trying to hack everyone else, so Project+ definitely helps a lot there."
"I would rate Mimecast Email Security a nine out of ten."
"It does a good job for us, and its admin console is easy to use."
"The solution is pretty straightforward to use and easy to set up."
"We like Mimecast's spam filtering. The email signature feature is also a big plus for our users."
"The initial setup is very straightforward."
"Its administration console is very easy to use. The administration console is absolutely important because you interact with the platform through it."
 

Cons

"The pricing for personal users is not cost-effective."
"The attachment scanning feature doesn't work properly."
"The solution is very expensive."
"The price could be better, it should be reduced."
"Lately, Mimecast's outbound mail servers have been regularly blocklisted by spam filters. That didn't happen a few years back, but it seems to be a more frequent problem these days. When a server is blocklisted, it means all of my outgoing mail ends up in the recipient's junk mail. That affects my reputation and business confidence."
"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. They charge an extraction fee."
"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."
"The product's interface could be improved to be more user-friendly."
"The detection rates are an area for improvement."
 

Pricing and Cost Advice

Information not available
"For what it is, the product is overpriced."
"It's an expensive solution."
"The customers can select the license packages as per their requirements."
"The licensing costs are per-user for the product that you get with them."
"The solution is expensive."
"It is a bit expensive."
"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."
"We pay monthly fees to our provider."
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Top Industries

By visitors reading reviews
No data available
Computer Software Company
14%
Financial Services Firm
7%
Manufacturing Company
6%
Comms Service Provider
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What needs improvement with Microsoft Purview Customer Lockbox?
The pricing for personal users is not cost-effective. It feels expensive for individual expenses.
What is your primary use case for Microsoft Purview Customer Lockbox?
We are using Microsoft Purview Customer Lockbox for email access.
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.
What needs improvement with Mimecast Email Security with Targeted Threat Protection?
If I ask you about the room for improvement, we discussed the phishing aspect, the DNS system, and the key rotation. Apart from that, are there any other areas that you would like to see improved o...
 

Also Known As

No data available
Mimecast Email Security with Targeted Threat Protection
 

Overview

 

Sample Customers

Information Not Available
Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Find out what your peers are saying about Sophos, Proofpoint, Mimecast and others in Office 365 Protection. Updated: August 2025.
865,295 professionals have used our research since 2012.