Open-Xchange vs ProtonMail comparison

Open-Xchange and Proton Technologies are both solutions in the Email Applications category. Open-Xchange is ranked #11, while Proton Technologies is ranked #9 with an average rating of 8.5. Open-Xchange holds a 6.2% mindshare in EA, compared to Proton Technologies’s 6.4% mindshare. Additionally, 100% of Open-Xchange users are willing to recommend the solution, compared to 66% of Proton Technologies users who would recommend it.

Open-Xchange

Read 2 Open-Xchange reviews

1,461 Views
1,461 Comparison Views

100% willing to recommend

ProtonMail

Read 2 ProtonMail reviews

1,200 Views
1,200 Comparison Views

66% willing to recommend

Open-Xchange

ProtonMail

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Executive Summary

We performed a comparison between Open-Xchange and ProtonMail based on real PeerSpot user reviews.

Find out what your peers are saying about Google, Microsoft, Amazon Web Services (AWS) and others in Email Applications.

To learn more, read our detailed Email Applications Report (Updated: August 2025).

Buyer's Guide

Email Applications

August 2025

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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

Open-Xchange

Ranking in Email Applications

11th

Average Rating

8.0

Number of Reviews

Ranking in other categories

No ranking in other categories

ProtonMail

Ranking in Email Applications

9th

Average Rating

8.6

Reviews Sentiment

8.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of August 2025, in the Email Applications category, the mindshare of Open-Xchange is 6.2%, up from 3.7% compared to the previous year. The mindshare of ProtonMail is 6.4%, up from 3.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Applications

Featured Reviews

davidstrom

Owner at David Strom Inc.

Collaborate Using Open Xchange App Suite

A flexible unified communications service for collaborative workgroups that can share files, import and export contacts and calendars from a wide variety of data sources and Web services, including Facebook, LinkedIn, Twitter and Google’s Gmail. Entirely open-source based Price: Varies…

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reviewer68329471

Media Content Creator Intern

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.

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Top Industries

By visitors reading reviews

Computer Software Company

19%

Comms Service Provider

10%

Government

Retailer

Computer Software Company

17%

Comms Service Provider

15%

Educational Organization

11%

Manufacturing Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

Questions from the Community

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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.

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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 ...

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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...

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Comparisons

Microsoft Exchange vs Open-Xchange

Compared 36% of the time

Zimbra Collaboration vs Open-Xchange

Compared 30% of the time

Microsoft Exchange Online vs Open-Xchange

Compared 24% of the time

Google Workspace vs Open-Xchange

Compared 6% of the time

OpenText GroupWise vs Open-Xchange

Compared 3% of the time

More Open-Xchange Competitors

Google Workspace vs ProtonMail

Compared 43% of the time

Zoho Mail vs ProtonMail

Compared 17% of the time

Microsoft Exchange vs ProtonMail

Compared 11% of the time

Microsoft Exchange Online vs ProtonMail

Compared 10% of the time

Atomic Mail vs ProtonMail

Compared 8% of the time

More ProtonMail Competitors

Product Reports

Buyer's Guide

Email Applications

August 2025

Download Open-Xchange product report

Buyer's Guide

Email Applications

August 2025

Download ProtonMail product report

Overview

A cost effective messaging and collaboration solution based on open source components.

Open-Xchange

ProtonMail is the world‘s largest encrypted email provider, with over 11 million users trusting us to secure their data every day. We are the email service of choice for security-conscious enterprises.

Proton Technologies

Sample Customers

1&1, Host Europe, KPN, Ziggo, namecheap, Strato, Network Solutions

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Find out what your peers are saying about Google, Microsoft, Amazon Web Services (AWS) and others in Email Applications. Updated: August 2025.

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