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Microsoft Exchange Online vs ProtonMail 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 Exchange Online
Ranking in Email Applications
2nd
Average Rating
8.6
Reviews Sentiment
7.4
Number of Reviews
90
Ranking in other categories
No ranking in other categories
ProtonMail
Ranking in Email Applications
10th
Average Rating
8.6
Reviews Sentiment
8.0
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2025, in the Email Applications category, the mindshare of Microsoft Exchange Online is 13.4%, down from 16.1% compared to the previous year. The mindshare of ProtonMail is 6.1%, up from 3.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Applications
 

Featured Reviews

NancyHartman - PeerSpot reviewer
Effective collaboration achieved with versatile features and good customer service
There are always improvements needed. My personal issue with using OfficeSuite and the Exchange Server is that one has to cobble together a whole bunch of different applications. Therefore, a lot of scripting and programming knowledge is necessary. I am not an IT person; I am an educator, a trainer, a user. I want to get the work done. However, I find that the Exchange Server and possibly the way our company has set up access permissions require extensive programming knowledge. It might take six to eight weeks to get a programmer's time to build something, whereas I can use something like Smartsheet that will do everything I want without needing a programmer. Smartsheet is more end-user friendly compared to a Microsoft product. Microsoft believes an expert IT person should manage everything, however, I want to manage things on my own in a simplified way. That is not easy using the Exchange Server or Microsoft Office. It is not end-user friendly for development, and a programmer is needed. Once set up, using them as an end-user is fine. I find that the automations are not robust, and the FedRAMP systems are not robust. I have a few issues with Exchange and Office, but there's nothing I can do about it.
AP
Trust and anonymity play a key role in secure communications
I am uncertain about the two-factor authentication feature. I have had integrations with other Proton services and have used Proton VPN once, though it has limited features. Simple Mail, which was acquired by ProtonMail, has been very useful for me. The pricing is moderate. I have not used any paid services from ProtonMail. It is not very costly, but I have not used any premium services. I am a customer of ProtonMail. I would rate ProtonMail an eight out of ten due to their transparency and the utility of their simple login feature. My job and company name should remain hidden.

Quotes from Members

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

Pros

"The solution is easy to use and the cloud version has taken a lot of challenges away from the user."
"When you used to write to someone, you would often begin typing their name and their email address would appear; you would simply click and you would have the correct email address. That has been working for a while, but having the location address appear was a pleasant surprise. It was amazing."
"Exchange Online doesn't just do email, it allows for collaboration with inbuilt chat and calling facilities and document sharing."
"The solution has been stable with good performance on offer."
"The product enables us to have remote meetings."
"The online version is faster, as it is a cloud instance. We can have massive mailbox capacity: 100 GB per user, which is huge. We can't provision such capacity internally, as the company would get burnt out paying for mailbox storage."
"The product was simple to use."
"Microsoft Exchange Online has great functionality."
"What I appreciate most about ProtonMail is that they are trusted, which is why I choose them."
"The auto encryption of attachments is valuable."
 

Cons

"Documentation is lacking."
"Cloud security is always a concern and the solution can always increase their security."
"Exchange Online has issues with its mail flow and content search."
"There is room for improvement in terms of security, as it could be better."
"We use different software for email spoofing filters and similar functions because Exchange is quite limited in this area."
"The cost is very high, and not every customer can afford licenses."
"The SaaS platform performance could be improved. At a previous company, we used this same solution on-premises. The data exchange was much faster compared to the SaaS platform and we sometimes experience lags."
"When we need to purchase additional licenses for additional users, the process is slow."
"One improvement could be the integration between ProtonMail and Proton Pass, allowing sharing of specific secrets via email."
"I think it is good but I feel that only tech-savvy people use ProtonMail. It is not that popular among other people."
 

Pricing and Cost Advice

"We bought some licenses, and some are within our package or partnership with Microsoft."
"The costs of this platform vary based on subscriptions, but it is generally reasonable."
"The pricing for this solution is good. We renew our contract every three years. I would rate the pricing for this solution a three out of five."
"The solution's pricing is reasonable."
"The product is expensive and has an annual subscription."
"The cost of Microsoft Exchange Online is approximately $4 to $36 per user. They do not give a discount which is not good. The solution is expensive if you have 800 to 1,000 users. They should give discounts when you have a lot of users."
"We pay per user per year for the cluster with over a thousand users."
"I think that the price is a little high, especially considering that Google have a similar, free email solution."
Information not available
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Top Industries

By visitors reading reviews
Computer Software Company
11%
Financial Services Firm
9%
Educational Organization
6%
Comms Service Provider
6%
Computer Software Company
15%
Comms Service Provider
13%
Educational Organization
12%
Construction Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What do you like most about Microsoft Exchange Online?
The benefits are widespread and effective communication. We use Microsoft Teams for meetings within and outside our organization. Additionally, Teams can be used for chat, allowing us to track comm...
What is your experience regarding pricing and costs for Microsoft Exchange Online?
The cost of Microsoft Exchange Online varies between $4 and $25 per user per month, depending on the different plans we use for different users.
What needs improvement with Microsoft Exchange Online?
The mobile version of Microsoft Outlook has limited features compared to the desktop version. We find fewer features in the mobile version of Microsoft Exchange Online, so that could be improved if...
What is your experience regarding pricing and costs for ProtonMail?
The pricing is competitive, offering good value on the average plan. It’s approximately $100 for annual billing.
What needs improvement with ProtonMail?
In terms of what can be improved in ProtonMail, I think it is good but I feel that only tech-savvy people use ProtonMail. It is not that popular among other people. Therefore, we do not use it for ...
What is your primary use case for ProtonMail?
My use cases include using ProtonMail for Drive occasionally for storing files. After some time, I stopped using that feature. Primarily, I use it for sending emails when I want to maintain anonymi...
 

Also Known As

Exchange Online, Exchange Online Plan 1, Exchange Online Plan 2, MS Exchange Online
No data available
 

Overview

 

Sample Customers

Bank Alfalah Ltd., Paderborn-Lippstadt Airport, Blue Star Infotech, Scitec Nutrition, Resolution Films, British Airways, Empire Cinemas, InnoGames
Wall street journal,The New york times, The Gurdian, Forbes, Fox News
Find out what your peers are saying about Microsoft Exchange Online vs. ProtonMail and other solutions. Updated: July 2025.
862,499 professionals have used our research since 2012.