Element vs Mattermost vs Rocket.Chat

Pick up to 4 tools and see their free plans, entry prices, platforms and limits in one table. Every fact comes from each vendor's own pages, checked 7 November 2026.

Compared on	Element Free plan Visit Remove	Mattermost Contact sales Visit Remove	Rocket.Chat Free plan Visit Remove
What it is	Secure messaging and calls built on the decentralised Matrix standard	Self-hosted team messaging and workflow platform for security-sensitive organizations	Self-hostable secure messaging platform with Matrix and XMPP federation
Free plan	Element Server Suite Community is free of charge for non-professional deployments and evaluations, for 1 to 100 users, and you run it yourself	No	Starter is described as a free self-managed workspace for technical evaluation, small businesses and non-profits; its user and feature limits were not shown on the pages read
Cheapest paid plan	Not publishedElement pricing	Not publishedMattermost pricing	Not publishedRocket.Chat pricing
What it covers	Not stated	Not stated	Not stated
Free trial	None stated	A 1-hour trial environment is offered from the Try Mattermost menu; no longer trial terms were stated	None stated
Platforms	Web, Windows, Mac, Linux, iOS, Android, Self-hosted	Web, Windows, Mac, Linux, iOS, Android, Self-hosted	Web, Windows, Mac, Linux, iOS, Android, Self-hosted
Integrations (vendor's figure)	Not stated	Not stated	Not stated
Open source	Yes, self-hostable	Yes, self-hostable	Yes, self-hostable
Good for	Government and public institutions that need to host and control their own messaging Organizations that want federation between servers and vendors Individuals or small groups that want an encrypted chat app	Government and defense teams that must keep chat on their own infrastructure Engineering and security operations teams running incident response in chat Regulated companies that need retention and audit controls	Public sector and defense teams that need to host chat themselves Organizations that want to federate with Matrix or XMPP users Teams replacing an older on-premises chat system
Watch out for	Paid prices are not published; the pricing page sends buyers to sales The pricing page describes self-hosted deployments only, so a hosted option was not confirmed Running a server means you manage it yourself on the free tier	Prices are not published; the pricing page directs buyers to sales Licenses are sold as prepaid annual per-seat subscriptions, with each server needing its own license Marketing focuses on high-security sectors, so it may be more than a small team needs	Commercial pricing is not published The home page markets mainly to defense, government and critical infrastructure Licence terms were not stated on the pages read
Made by	Element	Mattermost	Rocket.Chat

Entry prices are the cheapest paid plan, as each vendor publishes it; “What it covers” says what that price is per (a user, a channel, a brand, a number of contacts). The sources are listed on each tool's page.

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