What are the key differences between Zimbra Open Source and Mattermost?

Compare Zimbra Open Source and Mattermost side by side on Lunoo to see detailed feature differences, AI scores, and expert analysis.

How are Zimbra Open Source and Mattermost scored?

Zimbra Open Source has an AI score of 7.2/10 and Mattermost has an AI score of 8.8/10. Scores are based on category fit, feature coverage, pricing signals, public reception, and recency.

Zimbra Open Source vs Mattermost 2026 — Compared

Zimbra Open Source

Mattermost

WINNER Mattermost

Mattermost edges ahead with a score of 8.8/10 compared to 7.2/10 for Zimbra Open Source. While both are highly rated in...

Zimbra Open Source

7.2 Good

Communication Get Zimbra Open Source open_in_new

emoji_events WINNER

Mattermost

8.8 Very Good

Communication Get Mattermost open_in_new

Zimbra Open Source From $10/user/month (Enterprise Edition) Free plan available

payments

Mattermost From $5/user/month for the paid plan Free plan available

psychology AI Verdict

Mattermost edges ahead with a score of 8.8/10 compared to 7.2/10 for Zimbra Open Source. While both are highly rated in their respective fields, Mattermost demonstrates a slight advantage in our AI ranking criteria. A detailed AI-powered analysis is being prepared for this comparison.

emoji_events Winner: Mattermost

verified Confidence: Low

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description Overview

Zimbra Open Source

Zimbra is an open-source groupware suite that includes email, calendar, and contact management functionalities. It supports sales automation through its integration capabilities and user-friendly interface. Suitable for businesses needing a comprehensive communication solution.

Mattermost

Mattermost is an open-source, self-hosted Slack alternative focused on security and data control. It offers similar features to Slack, including channels, direct messaging, and file sharing, but with the added benefit of complete control over your data. This makes it ideal for organizations with strict compliance requirements or concerns about data privacy. Mattermost's self-hosting capabilities a...