Mattermost vs Discord

Self-host swap-in for Discord. · Self-host Discord · Mattermost on os-alt

Mattermost is one of the open-source self-host replacements for Discord — license AGPL-3.0 (Team Edition), 15min docker-compose to stand up, and $5 vps for ~50 daily-active users. Compare against Discord's Free; Nitro at $9.99/user/mo for power-user perks below.

	Mattermostopen-source	Discordpaid SaaS
Category	Community / voice chat	Community / voice chat
License / pricing	`AGPL-3.0 (Team Edition)`	Free; Nitro at $9.99/user/mo for power-user perks
Starting price	$0 self-host	$9.99/user/mo
GitHub	mattermost/mattermost ★ 36.7k · last commit todayalive	closed source
Setup time	15min docker-compose	SaaS — sign up + bill
Monthly cost	$5 VPS for ~50 daily-active users.	from $9.99/user/mo (Free; Nitro at $9.99/user/mo for power-user perks)

Switching from Discord to Mattermost

Use bulkimport JSONL: write a script that reads Discord channels via the Discord API and converts to Mattermost's bulk format. Voice does not transfer (Mattermost calls is a different model).

Good fit for: Engineering teams who want Discord-shaped chat but with Slack-style polish.
Weak at: Voice/video huddles are weaker than Discord's voice channels.

Other open-source self-host alternatives to Discord

Revolt
AGPL-3.020min docker-compose$10 VPS for a small server — Mongo + several Rust services.
Matrix (Synapse)
AGPL-3.030-60min (Synapse + Element web client + reverse proxy)$10 VPS for a small homeserver.

Mattermost also replaces

Microsoft Teams— Team chat + video meetings
Slack— Team chat

In a terminal? npx os-alt discord prints Discord's self-host options — how the CLI works →

FAQ

Is Mattermost a free alternative to Discord?

Yes — Mattermost is open source under AGPL-3.0 (Team Edition). Self-host cost: $5 VPS for ~50 daily-active users.. Discord starts at $9.99/user/mo (Free; Nitro at $9.99/user/mo for power-user perks).

How long does Mattermost take to set up vs Discord?

Self-hosting Mattermost: 15min docker-compose. Discord is a hosted SaaS — sign up and you're in.

What is Mattermost good at, and what is it weak at?

Good fit for: Engineering teams who want Discord-shaped chat but with Slack-style polish.. Weak at: Voice/video huddles are weaker than Discord's voice channels..