Is Rocket.Chat cheaper than Mattermost Professional?

Yes. On their starting paid plans, Rocket.Chat is about 60% cheaper than Mattermost Professional — roughly $72 per seat per year.

Does Mattermost Professional have a free plan?

Mattermost Professional does not advertise an ongoing free tier as of pricing checked June 2026. Pricing starts at $10/mo per seat.

Yes — Rocket.Chat's pricing page lists a free tier (Free community; $4/user/mo Starter cloud). Limits apply; see source for current caps.

Pick Mattermost Professional if you're teams needing on-prem chat. Pick Rocket.Chat if you're orgs with strict data residency or self-host needs.

// comparison

pricing checked June 2026

Compare

🟦

$10/mo

Self-hostable team chat

Cheaper start

🚀

$4/mo

Open-source team chat you can self-host or run on their cloud.

Rocket.Chat is 60% cheaper than Mattermost Professional on starting plans — roughly $6/mo · $72/yr per seat.

Formula: monthly = pricier − cheaper · percent = round((monthly / pricier) × 100) · annual = monthly × 12

Pick Rocket.Chat if you're orgs with strict data residency or self-host needs. Pick Mattermost Professional if you're teams needing on-prem chat.

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Other ways to swap Mattermost Professional or Rocket.Chat.

Prices change often — verify on the vendor's site before switching.