Self-hosting Mattermost cost
Team Messaging
Mattermost is an open-source, self-hostable team messaging platform — an alternative to Slack and Microsoft Teams. It runs as a Go binary backed by PostgreSQL, with optional Elasticsearch for search, so its cost profile is driven mostly by file attachments and concurrent websocket connections.
The tables below show the recommended minimum specification for Mattermost at each user scale, and the cheapest matching plan on each of our tracked providers. Prices are approximate monthly list prices in USD.
Up to 100 users
Recommended minimum: 1 vCPU · 2 GB RAM
Single node, Postgres on the same host. Light real-time load.
Up to 500 users
Recommended minimum: 2 vCPU · 4 GB RAM
Dedicated DB recommended once message volume climbs.
Up to 1,000 users
Recommended minimum: 4 vCPU · 8 GB RAM
Split app + database tiers; enable Elasticsearch for search.
Up to 5,000 users (Enterprise)
Recommended minimum: 8 vCPU · 32 GB RAM
Enterprise architecture: run at least two stateless app nodes behind a load balancer, a dedicated PostgreSQL primary with a hot standby, a managed Redis for caching and websocket fan-out, and Elasticsearch for message search. Terminate TLS at the load balancer and pin sticky sessions for the websocket layer.
Prices are approximate list prices and may change at any time; verify on the provider's official site before purchasing. Specs are conservative single-node starting points. Deploy links may contain referral codes. Try the interactive calculator.