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Grammarly

Grammarly · AI Writing and Grammar Assistant

Open Grammarly

A writing assistant that checks grammar, clarity, tone, and style in real time, with AI suggestions for improving communication across emails, docs, and messages.

PricingFreemium
Setupeasy
Runs onWeb · Desktop · Browser extension
APINo
Open sourceNo
DocsYes
CategoryProductivity
GrammarWriting AssistantToneClarityEditingBrowser Extension

Best for

Professionals who write frequently and need real-time grammar and clarity feedback across all their tools

Not ideal for

Teams needing content generation from scratch or a full-featured AI writing platform

Who it's for

Professionals who write frequently and need real-time feedback across email, docs, and messages

Capabilities

  • Real-time grammar, spelling, and punctuation correction
  • Tone and clarity suggestions
  • AI-powered sentence rewrites and simplification
  • Plagiarism detection on paid plans
  • Works across browsers, Google Docs, Microsoft Word, and more

Limitations

  • Advanced AI rewriting and tone features require a paid plan
  • Suggestions can sometimes conflict with intentional stylistic choices
  • Less useful for creative or highly informal writing
  • Not a content generation tool — focused on editing existing text

Use cases

  • Proofreading emails, reports, and documents before sending
  • Improving the clarity and conciseness of written communication
  • Detecting and correcting grammar issues across multiple platforms
  • Adjusting tone to match the audience of a message
  • Reducing editing time for professionals who write frequently

Integrations & fit

Google DocsMicrosoft WordOutlookGmailSlackBrowser Extension
Good fit forSolo / individual, Startup / small team, Enterprise
Pricing modelFreemium· Free tier available
See pricing on Grammarly →

Alternatives to consider

Copilot

Microsoft

Enterprise teams using Microsoft 365, GitHub, and Windows workflows

Paid
Notion AI

Notion

Teams already using Notion who want AI assistance embedded in their existing docs and notes workflow

Paid

About Grammarly

Grammarly is a writing assistant that provides real-time grammar, spelling, punctuation, and style suggestions across a wide range of platforms — including browsers, Google Docs, Microsoft Word, Outlook, Gmail, and Slack. Its core value is that it works where you are already writing, rather than requiring you to move text into a separate tool. The AI layer adds tone detection, clarity suggestions, and full-sentence rewrite options on top of the underlying grammar checking. Grammarly's tone detector identifies whether a message reads as confident, formal, friendly, or assertive, and suggests adjustments based on your intended audience. The free tier covers essential grammar and spelling; Grammarly Business and Premium unlock the advanced AI rewriting, tone, and clarity features. It is most useful for professionals who write frequently — in emails, reports, or client-facing documents — and want real-time feedback embedded across all their tools rather than a separate editing pass.

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