Softwr

Communication · head to head

Rocket.Chat vs Slack

Rocket.Chat logo

Rocket.Chat

Communication

Deployment flexibility and compliance across regulatory frameworks

From
On request
Rated
-
Full reviewWebsite
Slack logo

Slack

Communication

Where work happens

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Slack has a free tier, so it costs nothing to try first.
  • Each has a real cost: Rocket.Chat all enterprise plan tiers use custom quote-based pricing; Slack 90-day message history limit on free plan results in important conversations disappearing
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Rocket.Chat and Slack actually diverge.

Attributes where Rocket.Chat and Slack differ
AttributeRocket.ChatSlack
Starting priceOn requestFree
Pricing modelquoteUnknown
Free tierNoYes
PlatformsWebWeb, iOS, Android, macOS, Windows, Linux
FoundedUnknown2009

Identical on both: user rating (Not yet rated), category (Communication).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Rocket.Chat

Nothing recorded that Slack does not also cover.

Only in Slack

  • Channels
  • Direct messaging
  • Voice & video calls
  • Screen sharing
  • File sharing
  • Search
  • Workflow builder
  • Slack Connect

What people use each for

The jobs each tool is most often brought in to do.

Rocket.Chat

  • Deploying HIPAA-compliant messaging for healthcare team communicationnot Slack
  • Meeting data sovereignty requirements for government and defense agenciesnot Slack
  • Federating secure channels with external partners without shared infrastructurenot Slack
  • Maintaining FINRA and MiFID II compliance for financial servicesnot Slack
  • Supporting classified network communications in air-gapped environmentsnot Slack

Slack

  • Team communicationnot Rocket.Chat
  • Project coordinationnot Rocket.Chat
  • Customer supportnot Rocket.Chat
  • Remote worknot Rocket.Chat
  • Cross-functional collaborationnot Rocket.Chat

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Rocket.Chat

  • All enterprise plan tiers use custom quote-based pricing
  • No published pricing for Commercial, Government, or Defense tiers
  • Starter plan link provided but pricing details not included on pricing page

Slack

  • 90-day message history limit on free plan results in important conversations disappearing
  • Per-user pricing becomes expensive quickly for larger teams
  • Notification overload with 78% of employees feeling overwhelmed by notifications
  • Mobile app performance issues including lag and slow syncing
  • Huddles limited to 50 people and cannot be recorded
  • Requires dedicated video conferencing service for formal meetings and webinars

Pricing, plan by plan

Rocket.Chat

On request

No published plan breakdown. See the Rocket.Chat review.

Slack

Free

No published plan breakdown. See the Slack review.

Which should you pick?

Choose Rocket.Chat if

Nothing in the data separates Rocket.Chat from Slack on the points above - pick on price and on how each one feels to use.

Rocket.Chat review

Choose Slack if

  • You need channels.
  • You want to start without paying.
  • You work on Web, iOS, Android, macOS, Windows, Linux.
  • You also want direct messaging.
Slack review

Questions people ask

Is Rocket.Chat or Slack better?
Neither clearly leads. Rocket.Chat starts at On request and Slack at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Rocket.Chat or Slack?
Slack has a free tier; the other does not. Paid plans start at On request for Rocket.Chat and Free for Slack.
Does Rocket.Chat or Slack run on more platforms?
Rocket.Chat runs on Web. Slack runs on Web, iOS, Android, macOS, Windows, Linux.
Can I use Slack for free?
Yes. Slack has a free tier, so you can try it without paying. Rocket.Chat starts at On request.
What is Rocket.Chat best used for?
Rocket.Chat is most often used for deploying hipaa-compliant messaging for healthcare team communication, meeting data sovereignty requirements for government and defense agencies, federating secure channels with external partners without shared infrastructure, maintaining finra and mifid ii compliance for financial services. Of those, deploying hipaa-compliant messaging for healthcare team communication and meeting data sovereignty requirements for government and defense agencies are not what Slack is typically brought in for.
What can Rocket.Chat do that Slack cannot?
Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing.

Answered from the vendors’ own pages

Rocket.Chat: How much does Rocket.Chat cost?

Rocket.Chat does not publish pricing. Commercial, Government, and Defense plans require contacting sales for custom quotes. A Starter plan is available for technical evaluation and small businesses but pricing is not shown.

Source
Slack: Does Slack have a free plan?

Yes, Slack offers a free plan indefinitely with no credit card required. Free users get 90-day message history, up to 10 app integrations, and 1:1 huddles.

Source
Rocket.Chat: What is the pricing model for Rocket.Chat?

Enterprise plans use a custom quote model. Pricing is determined based on deployment type, regulatory requirements, and specific organizational needs.

Source
Slack: What are Slack's pricing plans?

Slack offers Free, Pro ($7.25/user/month with annual billing), Business+ ($12.50/user/month), and Enterprise Grid (custom pricing). Monthly billing costs approximately 20% more than annual.

Source
Rocket.Chat: Is there a free plan available?

A Starter plan is mentioned for technical evaluation and small businesses, but no pricing or feature details are published on the pricing page.

Source
Slack: Does Slack support offline use?

Slack is a cloud-based platform and does not support robust offline work. Internet connectivity is required to access messages and collaborate.

Source
Slack: What integrations does Slack support?

Slack integrates with 43+ apps on average per team, including Google Drive, ChatGPT, Vercel, Asana, GitHub, and many others through their app marketplace.

Source
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Related pages

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