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

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

How are Mattermost and Zimbra Open Source scored?

Mattermost has an AI score of 8.2/10 and Zimbra Open Source has an AI score of 7.2/10. Scores are based on category fit, feature coverage, pricing signals, public reception, and recency.

Mattermost vs Zimbra Open Source 2026 - Compared

Mattermost

Zimbra Open Source

WINNER Mattermost

Mattermost edges ahead with a score of 8.2/10 compared to 7.2/10 for Zimbra Open Source. While both are highly rated in...

emoji_events WINNER

Mattermost

7.31 Good

Communication Get Mattermost open_in_new

Zimbra Open Source

6.36 Fair

Communication Get Zimbra Open Source open_in_new

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

payments

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

psychology AI Verdict

Mattermost edges ahead with a score of 8.2/10 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

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...

Zimbra Open Source

Zimbra is an open-source groupware platform offering email, calendar, and contact management features. It’s notable for providing a robust, customizable solution suitable for organizations seeking to manage internal communications and collaboration workflows. Zimbra is primarily used by businesses of various sizes requiring integrated business productivity tools and leveraging Linux environments.