Comparison

Compare Office Message Encryption vs Mimecast Secure Messaging

See this comparison of Office Message Encryption vs Mimecast Secure Messaging.

Snapshot

End to end email encryption within O365.

Snapshot

Bolt on encryption service for existing Mimecast email security clients

For

O365 customers looking for easy to use email encryption without using a third party solution.

For

Mimecast customers looking for secure web portal based email encryption.

What is Office 365 Message Encryption?

Office Message Encryption is Microsoft’s new email encryption service. It works directly within Outlook on Office 365 and aims to help businesses protect sensitive emails, stay in control of their data, and become compliant with their security needs. Recipients of encrypted messages who are in Office 365 will be able to read those messages seamlessly in Outlook. Users that receive encrypted messages on other email clients can view the messages in the OME portal.

What is Mimecast Secure Messaging?

Mimecast is one of the leading email security vendors. They offer an email encryption service which secures messages to stop accidental and deliberate data leaks. Their encryption platform is delivered via a secure web portal which recipients must log onto, in order to access email content, as this is more accessible and streamlined than other encryption options such as Public Key Infrastructure or Transport Layer Security. It offers businesses protection and controls over their email and attachments.

Profile: Office Message Encryption

Category:
Email Encryption
Website:
microsoft.com
Founded:
1975
Headquartered:
Redmond, WA, US
Deployment:
Cloud within O365
Starting Price:
Part of Office 365 E3
Suitable For:
O365 Enterprise Customers

Profile: Mimecast Secure Messaging

Category:
Email Encryption
Website:
mimecast.com
Founded:
2003
Headquartered:
Boston, MA, US
Deployment:
Cloud, Outlook Plugin
Starting Price:
Request Quote
Suitable For:
Customers already using Mimecast email security service

Features:

  • Allows sending of encrypted emails both inside and outside an organisation, with contacts who do not use O365 able to easily log in and view encrypted email
  • Low pricing for cost effective email encryption
  • Easy for end users to send and access encrypted email as it operates out of Office, so there is no third party functionality for them to lean
  • Easy to configure functionality for admins to set policies over which emails are encrypted
  • Easy to implement, being fully integrated with Office 365
  • End users have access to controls over encrypted email they send with policies such as blocking forwarding, and custom policies can be created
  • Secure gateway requires a users normal Microsoft account and password as the key to the email, so accessing encrypted messages is easy

Features:

  • Encrypted emails are stored in a secure cloud platform
  • The platform is easy to use for email senders, with a range of controls they can use within outlook to manage encrypted emails in line with defined policies
  • Range of admin policies available such as settings to block administrators from viewing information within encrypted emails
  • Simple to access encrypted emails via a secure web portal, eliminating the need for more complex encryption methods
  • Configurable controls such as read receipts, forwarding and printing restrictions, and access revocation
  • Integrates with Large File Sending (upto 2GB)
  • Popular with Mimecasts' legal sector customers

Expert Insight:

Office Message Encryption is a new encryption service, and currently a relatively basic one. The secure web portal used to encrypt emails is an effective security measure which will protect sensitive emails, however it may not be as secure as alternative service which require a separate password to the one used to access the users email account. The service is easily implemented, and easy for end users to navigate. There are also some customisable policies for encrypted emails, such as end users being able to choose if they want the encrypted email to be forwarded or not. But this is a bare bones service. There are much less customisable policies offered than competitors, who generally offer the ability to stop copying and pasting and have attachment protection.

Microsoft do offer custom policies, but these can be complicated to make, and many of the features you may wish to build come as standard with other services. For example, the process to revoke the rights to encrypted email is much more complicated on Microsoft’s service than competitors like Mimecast, which allows this through a click of a button in Outlook. There is also no reporting or analytics of the encryption service offered at present.

This service is not as fully featured as competitors and will therefore appeal to O365 customers requiring a basic and easy to use email encryption service. However, for organizations requiring more advanced features, companies should consider trialling a more fully featured encryption service.

Expert Insight:

Mimecast offer a simple to use email encryption service. The secure web portal means it’s easy for end users to open encrypted emails without compromising on security. There is also a good amount of configurable controls, meaning that the level of security can be customised to each specific need within your organisation. For example, if a confidential email is mistakenly sent to the wrong person, even with the access to read it, access to that email can be revoked even after sending. There are also controls to stop the data being forwarded or printed. There are read receipts given, but there is less of a focus on auditing to gain more insights into where emails are being shared than competitors like Virtru offer.

Mimecast encryption is not offered as a standalone product but comes as part of Mimecast’s Information Archiving and Secure messaging subscriptions, with varying degrees of features and controls on offer. This makes it a good choice for Mimecast customers who are looking for email encryption to add to their existing security products. Mimecast offers strong encryption with a range of end user controls. It’s a good solution to consider for email encryption, especially for existing Mimecast customers.