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 #10 with an average rating of 9.0. Open-Xchange holds a 5.3% mindshare in EA, compared to Proton Technologies’s 5.9% 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

1,400 Views
952 Comparison Views

100% willing to recommend

ProtonMail

Read 2 ProtonMail reviews

1,175 Views
989 Comparison Views

66% willing to recommend

Open-Xchange

ProtonMail

Comparison Buyer's Guide

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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: June 2025).

Buyer's Guide

Email Applications

June 2025

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Helped 856,873 peers since 2012

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

10th

Average Rating

8.6

Reviews Sentiment

8.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of June 2025, in the Email Applications category, the mindshare of Open-Xchange is 5.3%, up from 3.5% compared to the previous year. The mindshare of ProtonMail is 5.9%, 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…

Read full review

Vitor Vicente

Works

Secure email communication facilitates safe financial exchanges and enhances data privacy

I use ProtonMail for exchanging invoicing with clients, managing financial information, and receiving notifications from bank accounts and investment brokers. It's dedicated to high-importance communication involving financial information The auto encryption of attachments is valuable. ProtonMail…

Read full review

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Top Industries

By visitors reading reviews

Computer Software Company

21%

Comms Service Provider

10%

Retailer

Government

Computer Software Company

15%

Educational Organization

12%

Comms Service Provider

12%

Media 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?

The UI was previously cumbersome, however, it has improved. One improvement could be the integration between ProtonMail and Proton Pass, allowing sharing of specific secrets via email. However, thi...

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What is your primary use case for ProtonMail?

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Comparisons

Microsoft Exchange vs Open-Xchange

Compared 34% of the time

Zimbra Collaboration vs Open-Xchange

Compared 33% of the time

Microsoft Exchange Online vs Open-Xchange

Compared 22% of the time

Google Workspace vs Open-Xchange

Compared 6% of the time

OpenText GroupWise vs Open-Xchange

Compared 2% of the time

More Open-Xchange Competitors

Google Workspace vs ProtonMail

Compared 46% of the time

Zoho Mail vs ProtonMail

Compared 18% of the time

Microsoft Exchange vs ProtonMail

Compared 11% of the time

Microsoft Exchange Online vs ProtonMail

Compared 9% of the time

Superhuman vs ProtonMail

Compared 4% of the time

More ProtonMail Competitors

Product Reports

Buyer's Guide

Email Applications

June 2025

Download Open-Xchange product report

Buyer's Guide

Email Applications

June 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: June 2025.

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We monitor all Email Applications reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.