Team chat
Mattermost privacy rating
Self-hostable team chat with channels, threads, calls and integrations, with desktop, mobile and web apps. Messages are not end-to-end encrypted, and server telemetry is on by default but can be turned off.
Summary
Mattermost scores 45 out of 100 (grade D) on the team chat criteria. It meets 1 of 4 criteria: no ads or data sales. It partly meets open source and independent audit. It does not meet no trackers or telemetry. It is based in the United States: Five Eyes member; subject to the US CLOUD Act.
Score 45 out of 100. How scoring works
Criteria
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Partial
Open source Weight 3 of 3
Is all the source code needed to run the product public?
Most code is AGPL-3.0 and Apache-2.0, and some enterprise code is public under the source-available Mattermost Source Available License, but other paid enterprise features are built from a private repository.
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No
No trackers or telemetry Weight 3 of 3
Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?
The website loads Google Tag Manager, and server telemetry is on by default.
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Yes
No ads or data sales Weight 2 of 3
Is the product funded without advertising, ad targeting or selling user data?
Funded by commercial licenses and subscriptions, with no ads in the product.
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Partial
Independent audit Weight 2 of 3
Has an independent security or privacy audit been published within the last three years?
SOC 2 Type II and other audit reports exist but are available only on request through the trust center.