Mattermost — system requirementsverification pending

Self-hosted team chat and collaboration platform, an on-premises alternative to Slack. · website · repository

Minimum RAM

2 GB

“1 - 1,000 users - 1 vCPU/cores, 2 GB RAM”

Scope: Team deployment (single server), 1-1,000 registered users tier — the lowest of two published team-deployment tiers · official source · retrieved 2026-08-02

Minimum CPU cores

1 core

“1 - 1,000 users - 1 vCPU/cores, 2 GB RAM”

Scope: Team deployment (single server), 1-1,000 registered users tier — the lowest of two published team-deployment tiers · official source · retrieved 2026-08-02

No official figure published for: recommended RAM, recommended CPU cores

Only two team-deployment tiers are published (1-1,000 and 1,000-2,000 registered users) plus a separate enterprise multi-server scaling guide. The second tier is a higher-scale bracket, not a general recommended baseline above the minimum (Defect Class #2) — no distinct recommended figure exists.

We publish nothing we can't source. Evidence of the gap.

External services

postgresql (required) — source

Container

Image: mattermost/mattermost-team-edition · compressed size (amd64): 438 MB · architectures: amd64 · source, retrieved 2026-08-02

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