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AppRiver Email Archiving vs Microsoft Defender for Office 365 comparison

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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

AppRiver Email Archiving
Ranking in Email Archiving
11th
Average Rating
10.0
Reviews Sentiment
7.7
Number of Reviews
1
Ranking in other categories
No ranking in other categories
Microsoft Defender for Offi...
Ranking in Email Archiving
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Security (2nd), Advanced Threat Protection (ATP) (3rd), Microsoft Security Suite (9th), Secure Email Gateway (SEG) (2nd)
 

Mindshare comparison

As of October 2026, in the Email Archiving category, the mindshare of AppRiver Email Archiving is 2.4%, up from 0.8% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 8.8%, down from 32.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Archiving Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3658.8%
AppRiver Email Archiving2.4%
Other88.8%
Email Archiving
 

Featured Reviews

reviewer1888686 - PeerSpot reviewer
CEO at a financial services firm with 1-10 employees
Great for email archiving, good search functionality, and bug-free
The deployment was very simple. It was backed into the Global Relay host exchange. We're using it through a company called Global Relay and it's on their server. The deployment is instantaneous. It's across all the emails under the domain. You only need one person to implement it. The product does not require any maintenance.
Emeka Ndulu - PeerSpot reviewer
Cloud Solutions Architect at a tech services company with 201-500 employees
Improves threat visibility and response while reducing manual tasks and training users against phishing
I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection. It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment. I get to detect it and respond, so the threat intelligence is very effective. Microsoft security solutions save my time. It saves money because once I protect my environment, I don't lose money. It has decreased my detection time and my time to respond.

Quotes from Members

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

Pros

"The security aspect and the search feature are the best features."
"Defender has reduced the time our security team spends on tasks by 10 to 15 percent, allowing us to focus on other areas."
"The stability of Microsoft Defender for Office 365 is fantastic."
"The technical support is good and quick to resolve issues."
"Does a thorough job of examining email and URLs for malicious content."
"Microsoft Defender has a feature to protect each and every attachment. Even if it's an encrypted attachment, it will check for any potential threats."
"Our customers are satisfied with Defender for 365 because Microsoft products are easy to use and customize to meet the client's needs. Everything is in one place, so we can adjust policies as needed for phishing, DLP, ATP, or any other security features that our clients want to apply."
"The feature of Microsoft Defender for Office 365 that I like the most is probably the email features specifically, because those are the ones that a typical end user will accidentally click on a link not knowing what it is, and it'll catch it, and then it'll feed it over to Defender and stop the attack from happening before it actually can."
"Microsoft Defender for Office 365 is a cloud-based email filtering service that helps protect our organization against unknown malware and viruses by providing robust zero-day protection and includes features to safeguard our organization from harmful links in real-time."
 

Cons

"We'd like there to be an app whereby we could access the solution."
"There needs to be an improvement in integrating the product to work across multiple operating systems, and to have better support for non-Microsoft file types."
"Sometimes, phishing emails manage to pass through the filter, so the system needs to enhance its phishing email detection capabilities."
"Microsoft Defender for Office 365 should be more proactive."
"We need to be able to whitelist data at the backend."
"The custom alerts have to improve a lot."
"There's room for improvement regarding the time frame for retrieving emails."
"Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published."
"The phishing and spam filters could use some improvement."
 

Pricing and Cost Advice

Information not available
"I was working in the government and it was too expensive for us to use our Microsoft products."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"Defender for 365 comes in various plans and licenses, along with other Microsoft security solutions. Purchasing this kind of package or security bundle gives good value for money, and that's what I recommend."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"I know that the product is incredibly expensive."
"The product is expensive."
"The pricing has become expensive."
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Top Industries

By visitors reading reviews
No data available
Computer Software Company
11%
Manufacturing Company
10%
Financial Services Firm
8%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
 

Questions from the Community

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What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
My experience with pricing, setup, and licensing is that it's actually quite reasonable even on the licensing side as a standalone product. It's very competitive compared to what competitors are ch...
What needs improvement with Microsoft Defender for Office 365?
I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking for malware. We are seeing a lot more malware-less emails that Defender for Offi...
What is your primary use case for Microsoft Defender for Office 365?
My main use cases for Microsoft Defender for Office 365 include email hygiene.
 

Also Known As

No data available
MS Defender for Office 365
 

Overview

 

Sample Customers

Smith Electric and Associates
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about Mimecast, Microsoft, Barracuda Networks and others in Email Archiving. Updated: October 2026.
919,088 professionals have used our research since 2012.