ProtonMail vs Zimbra Collaboration comparison

Proton Technologies and Zimbra are both solutions in the Email Applications category. Proton Technologies is ranked #10 with an average rating of 9.0, while Zimbra is ranked #5 with an average rating of 8.0. Proton Technologies holds a 4.7% mindshare in EA, compared to Zimbra’s 9.0% mindshare. Additionally, 50% of Proton Technologies users are willing to recommend the solution, compared to 96% of Zimbra users who would recommend it.

ProtonMail

Read 1 ProtonMail review

1,107 Views
1,013 Comparison Views

50% willing to recommend

Zimbra Collaboration

Read 29 Zimbra Collaboration reviews

2,972 Views
2,295 Comparison Views

96% willing to recommend

ProtonMail

Zimbra Collaboration

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Executive Summary

We performed a comparison between ProtonMail and Zimbra Collaboration 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: March 2025).

Buyer's Guide

Email Applications

March 2025

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Helped 845,040 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

ProtonMail

Ranking in Email Applications

10th

Average Rating

9.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Zimbra Collaboration

Ranking in Email Applications

5th

Average Rating

8.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of April 2025, in the Email Applications category, the mindshare of ProtonMail is 4.7%, up from 3.8% compared to the previous year. The mindshare of Zimbra Collaboration is 9.0%, down from 10.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Applications

Featured Reviews

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…

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Muhammad Talha Baig

Business Analyst and Associate Project Manager at SAMI Pharmaceuticals

One of the premium features was customized rooms tailored to the collaboration needs

Zimbra's strength lies in its individuality, and it should focus on leveraging its unique features rather than trying to emulate competitors. My organization has certified Zimbra technicians, so we believe we can utilize Zimbra certification. However, I was recently informed by Zimbra that no such certification exists. I have recently completed the test kit, and after the training, I will gain access to tickets. Therefore, if any clients are experiencing issues, we have a certified technical team available to provide support 24/7. This is how we can cater to our client's needs. I recommend Zimbra to small-scale and enterprise customers. Anyone, even those with 5 users, can opt for Zimbra. Overall, I rate the solution a nine out of ten.

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Quotes from Members

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

Pros

"The auto encryption of attachments is valuable."

"The solution is easy to implement."

"One of the premium features was customized rooms tailored to the collaboration needs. Many of the clients customize features such as organization logos and scanners."

"The stability is good and keeps getting better with each new update."

"Zimbra Collaboration has a good web interface."

"The logs, troubleshooting, and tracking we have found to be the most valuable features. We have any issues with lost messages the features are useful. It is very easy to track and log."

"The Zimbra Collaboration's most valuable feature is web access."

"Zimbra Collaboration is a good tool for video calls...Zimbra Collaboration's initial setup phase was easy."

"The configuration is simple."

More Zimbra Collaboration pros

Cons

"One improvement could be the integration between ProtonMail and Proton Pass, allowing sharing of specific secrets via email."

"Some issues cause the solution not to function correctly or to cause downtime once a month."

"I would like to see a Microsoft schedule function added."

"We have had an issue with security."

"Zimbra should provide a desktop client. Right now, we are using a web browser for accessing our emails. There should also be a desktop client."

"Zimbra Collaboration does not have a solution roadmap as aggressive as the new collaboration mail solutions. Additionally, they can have a better interface and integration with single sign-on."

"It does have a few bugs."

"The solution could use more integration with third-party tools."

"The tool should improve its multi-cloud feature."

More Zimbra Collaboration cons

Pricing and Cost Advice

Information not available

"The solution is competitively priced."

"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the price a four"

"We do not pay for licenses to use this solution."

"Zimbra Collaboration offers a good price-to-feature ratio."

"When it comes to the licensing of Zimbra Collaboration, my license covers the servers and I find its terms to be much simpler than those of Microsoft Exchange."

"If you choose the network edition, it is a little pricier. They have the open-source edition too which is only community supported."

"The solution is not expensive compared to other products."

"There is an annual standard licensing fee to use Zimbra Collaboration and there is no other cost."

More Zimbra Collaboration pricing and cost advice

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Top Industries

By visitors reading reviews

Computer Software Company

14%

Educational Organization

12%

Comms Service Provider

11%

Government

Computer Software Company

19%

Government

Comms Service Provider

Financial Services Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

Questions from the Community

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.

See all answers

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?

See all answers

How does Zimbra Collaboration compare with Microsoft Exchange?

Zimbra is a free, open source collaborative software suite. The features I like best are the ease of integration and the email, calendar, and collaboration server with web interface. In addition, I...

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What do you like most about Zimbra Collaboration?

The most valuable feature of Zimbra for our team's productivity is its efficiency in handling email communication.

See all answers

What is your experience regarding pricing and costs for Zimbra Collaboration?

The solution is competitively priced.

See all answers

Comparisons

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Compared 46% of the time

Zoho Mail vs ProtonMail

Compared 18% of the time

Microsoft Exchange vs ProtonMail

Compared 13% of the time

Microsoft Exchange Online vs ProtonMail

Compared 12% of the time

Superhuman vs ProtonMail

Compared 3% of the time

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Microsoft Exchange vs Zimbra Collaboration

Compared 31% of the time

Open-Xchange vs Zimbra Collaboration

Compared 20% of the time

KerioConnect vs Zimbra Collaboration

Compared 16% of the time

IceWarp vs Zimbra Collaboration

Compared 8% of the time

More Zimbra Collaboration Competitors

Product Reports

Buyer's Guide

Email Applications

March 2025

Download ProtonMail product report

Buyer's Guide

Zimbra Collaboration

March 2025

Download Zimbra Collaboration product report

Overview

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

Zimbra Collaboration provides administrators and their end users innovative features that solve the challenges faced by organizations using today's legacy communications infrastructure.

Zimbra

Sample Customers

Wall street journal,The New york times, The Gurdian, Forbes, Fox News

NEC Biglobe, City of Ventura, Monterey Bay Aquarium Research Institute, Hola Publishing, BIG, Sleepwell, LaFayette College, Xmission, DNA, Ring Line, Future Group, TIGC

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