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All industries · head to head

Grammarly vs Mattermost

Grammarly logo

Grammarly

All industries

Great writing, simplified

From
Free
Rated
-
Full reviewWebsite
Mattermost logo

Mattermost

Communication & Collaboration

Channel-centric collaboration for secure workflows

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Grammarly has a free tier, so it costs nothing to try first.
  • Each has a real cost: Grammarly occasional false positives and grammatically incorrect suggestions that can introduce errors; Mattermost no prices are published for any of the three paid tiers (Professional, Enterprise, Enterprise Advanced); all require contacting sales

Where they differ

Only the attributes on which Grammarly and Mattermost actually diverge.

Attributes where Grammarly and Mattermost differ
AttributeGrammarlyMattermost
Starting priceFreeOn request
Pricing modelUnknownquote
Free tierYesNo
PlatformsWeb, macOS, Windows, iOS, AndroidWeb
CategoryAll industriesCommunication & Collaboration
Founded2009Unknown

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

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 Grammarly

  • Grammar checking
  • Spelling correction
  • Punctuation
  • Clarity suggestions
  • Engagement feedback
  • Delivery insights
  • Plagiarism checker
  • Citation generator

Only in Mattermost

Nothing recorded that Grammarly does not also cover.

What people use each for

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

Grammarly

  • Email writingnot Mattermost
  • Document editingnot Mattermost
  • Academic writingnot Mattermost
  • Business communicationnot Mattermost
  • Content creationnot Mattermost

Mattermost

No use cases recorded yet. See the Mattermost review.

Where each one falls short

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

Grammarly

  • Occasional false positives and grammatically incorrect suggestions that can introduce errors
  • Privacy concerns about sending text to Grammarly's servers for analysis
  • AI capabilities sometimes produce hallucinations and fabricated citations that appear grammatically correct

Mattermost

  • No prices are published for any of the three paid tiers (Professional, Enterprise, Enterprise Advanced); all require contacting sales
  • Professional is capped at a maximum of 250 users, forcing a move to Enterprise for larger teams
  • Licenses are sold only as prepaid annual subscriptions, and organizations that exceed their licensed seat count must purchase additional seats on a prorated quarterly basis

Pricing, plan by plan

Grammarly

Free
  • FreeFree
    • Basic grammar and spelling checks
    • Tone visibility
    • 100 AI prompts per month
  • Pro$12/month
    • Sentence rewrites
    • Tone adjustment
    • Plagiarism and AI detection

Mattermost

On request

No published plan breakdown. See the Mattermost review.

Which should you pick?

Choose Grammarly if

  • You need grammar checking.
  • You want to start without paying.
  • You work on Web, macOS, Windows, iOS, Android.
  • You also want spelling correction.
Grammarly review

Choose Mattermost if

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

Mattermost review

Questions people ask

Is Grammarly or Mattermost better?
Neither clearly leads. Grammarly starts at Free and Mattermost at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Grammarly or Mattermost?
Grammarly has a free tier; the other does not. Paid plans start at Free for Grammarly and On request for Mattermost.
Does Grammarly or Mattermost run on more platforms?
Grammarly runs on Web, macOS, Windows, iOS, Android. Mattermost runs on Web.
Can I use Grammarly for free?
Yes. Grammarly has a free tier, so you can try it without paying. Mattermost starts at On request.
What is Grammarly best used for?
Grammarly is most often used for email writing, document editing, academic writing, business communication. Of those, email writing and document editing are not what Mattermost is typically brought in for.
What can Grammarly do that Mattermost cannot?
Grammarly covers Grammar checking, Spelling correction, Punctuation, Clarity suggestions.

Answered from the vendors’ own pages

Grammarly: Does Grammarly have a free version?

Yes, Grammarly offers a free tier with basic spelling, grammar, and punctuation checks, tone visibility, and 100 AI prompts per month. The Pro plan ($12/month annual) adds sentence rewriting, plagiarism detection, and 2,000 AI prompts.

Source
Grammarly: What platforms does Grammarly work with?

Grammarly works across 1 million+ apps including Google Docs, Microsoft Word, Outlook, Slack, Gmail, and web browsers. It also integrates with productivity tools like Asana, Jira, Monday.com, Confluence, and HubSpot.

Source
Grammarly: Can I use Grammarly offline?

Grammarly requires an internet connection to function, though the browser extension works with some offline text areas. For offline use, the desktop app and browser extensions sync when reconnected.

Source
Grammarly: What is included in the Enterprise plan?

The Enterprise plan includes unlimited team members, dedicated support, custom roles and permissions, data loss prevention, bring-your-own-key encryption, and unlimited AI prompts. Pricing is custom and available by contacting sales.

Source
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