Grammarly – AI Writing Assistant, Grammar Checker & AI Writer

1. Grammar & Spelling Checker

Grammarly’s original and still fundamental capability is real-time writing correction.

It can identify issues involving:

• Grammar
• Spelling
• Punctuation
• Word choice
• Sentence construction
• Commonly confused words
• Clarity
• Fluency
• Conciseness
• Readability

Suggestions appear directly where the user is writing, reducing the need to copy text into a separate editor. Grammarly works across more than 1 million apps, websites, and programs.

2. AI Writing & Content Generation

Grammarly’s generative AI can create content from natural-language instructions.

It can generate:

• Emails
• Replies
• Blog posts
• Reports
• Documents
• Social media content
• Proposals
• Introductions
• Outlines
• Marketing copy
• Professional communications
• Other custom content

Users can begin with a blank page and describe what they need, allowing Grammarly to generate a structured draft.

3. AI Rewriting

Grammarly can rewrite existing content rather than requiring users to start again.

It can:

• Rewrite sentences
• Rewrite paragraphs
• Improve clarity
• Make writing more concise
• Make writing more engaging
• Improve fluency
• Change wording
• Preserve the original meaning
• Adapt text for a specific audience

This makes Grammarly useful both as a writing generator and as an editorial assistant.

4. Tone Adjustment

Grammarly analyzes the tone of written communication and helps users adjust it.

Depending on the context, users can make writing sound:

• Professional
• Friendly
• Confident
• Formal
• Casual
• Persuasive
• Empathetic
• More direct
• More conversational

This is particularly useful for email, customer communication, workplace messaging, and professional documents.

5. AI Agents

Grammarly has expanded its product around specialized AI agents.

Examples include:

• Proofreader – improves correctness, structure, and clarity
• Paraphraser – rewrites content while retaining the underlying ideas
• Reader Reactions – predicts how a selected audience may interpret the writing
• Citation Finder – identifies sources that can support or challenge claims
• AI Grader – evaluates writing according to specified criteria or rubrics
• AI Detector – analyzes text for signals associated with AI-generated content
• Humanizer – makes AI-assisted writing sound more natural
• Other context-aware writing and productivity agents

These agents allow Grammarly to assist with different stages of the writing process rather than simply correcting errors.

6. Grammarly Docs

Docs is Grammarly’s dedicated AI-native document editor.

It provides a workspace where users can:

• Brainstorm
• Draft
• Edit
• Rewrite
• Proofread
• Research
• Generate ideas
• Get AI feedback
• Check citations
• Analyze audience reactions
• Improve documents

Docs is designed to combine writing and AI assistance in the same workspace rather than requiring users to move between separate applications.

7. AI Chat

Grammarly includes an AI Chat capability that allows users to interact conversationally with AI.

It can be used for:

• Asking questions
• Brainstorming
• Research
• Generating ideas
• Rewriting
• Refining messaging
• Working with documents
• Developing content

The current AI Chat experience is integrated into Grammarly’s writing environment and Docs rather than positioning Grammarly primarily as a general-purpose chatbot.

8. Paraphrasing

Grammarly’s Paraphraser can transform existing writing while maintaining its core meaning.

It can help users produce writing that is:

• More professional
• More concise
• More engaging
• More creative
• More natural
• Better suited to a particular audience

This is useful for editing articles, academic work, business documents, emails, and other written material.

9. Plagiarism Checker

Grammarly provides plagiarism detection to identify potential matching content against external sources.

The tool can also provide citation suggestions when potentially copied or source-dependent material is detected.

This is particularly useful for:

• Students
• Researchers
• Writers
• Bloggers
• Content marketers
• Professional authors

Grammarly includes plagiarism detection among its current writing and authenticity tools.

10. AI Detector

Grammarly provides an AI Detector designed to identify passages that may have been generated by AI.

The tool can highlight sections that show characteristics commonly associated with AI-generated writing.

Grammarly positions AI detection as part of a larger authenticity workflow that also includes Authorship, Humanizer, plagiarism checking, and citation tools.

11. Authorship

Grammarly Authorship records how writing was created so users can demonstrate the origin and development of their work.

It can distinguish between content that was:

• Typed
• Pasted
• AI-assisted
• Developed through the user’s writing process

Authorship can be used with Microsoft Word, Google Docs, and Canvas LMS submissions.

Unlike an AI detector, which analyzes the finished text, Authorship records aspects of the writing process itself.

12. Citation Finder & Citation Generator

Grammarly provides tools for academic and professional writing that need source support.

Citation capabilities include:

• Finding sources
• Identifying sources supporting claims
• Identifying conflicting sources
• Generating formatted citations
• Supporting APA
• Supporting MLA
• Supporting Chicago and other common citation formats

The Citation Finder is integrated into Grammarly’s broader AI writing workflow and can help users research and support arguments without leaving their document.

13. Reader Reactions

Reader Reactions is an AI agent designed to predict how a selected audience may respond to a piece of writing.

It can help users consider:

• Likely reader takeaways
• Potential questions
• Possible confusion
• Audience reactions
• Whether the message communicates effectively

This is particularly useful for proposals, business communication, academic writing, presentations, and persuasive documents.

14. AI Humanizer

Grammarly’s Humanizer is designed to make AI-assisted writing sound more natural and authentic.

It can help reduce robotic or formulaic phrasing while attempting to preserve the user’s intended voice.

It can be used for:

• Emails
• Articles
• Reports
• Proposals
• Blog posts
• Other AI-assisted content

Humanizer is part of Grammarly’s broader writing-authenticity toolkit.

15. Translation & Multilingual Writing

Grammarly has expanded beyond English and now provides writing assistance in 20+ languages.

Current supported languages include languages such as:

• English
• Spanish
• French
• German
• Italian
• Portuguese
• Dutch
• Hindi
• Korean
• Chinese
• Japanese-related regional support is not listed among the current 20+ writing languages, so it should not be advertised as a supported Grammarly writing language without checking the specific feature.

Grammarly also provides inline translation and supports translation into 19 languages through its current translation functionality. Its dedicated translator supports 52 common languages, including dialects.

16. Writing Across Apps

One of Grammarly’s major differentiators is that it is not restricted to a single editor.

Grammarly works across:

• Gmail
• Microsoft Outlook
• Google Docs
• Microsoft Word
• Microsoft PowerPoint
• Google Sheets
• Slack
• Salesforce
• LinkedIn
• Microsoft Teams
• Zendesk
• Web browsers
• Desktop applications
• Other supported applications and websites

Grammarly currently states that its assistance works across 1 million+ apps and websites.

17. Browser Extensions

Grammarly provides browser extensions for:

• Chrome
• Safari
• Firefox
• Microsoft Edge

The extension brings grammar checking, rewriting, generative AI, tone assistance, and other features into supported websites and web applications.

18. Desktop Applications

Grammarly provides applications for:

• Windows
• Mac

The desktop applications allow Grammarly to work inside supported desktop applications and word processors without requiring users to copy and paste their content into the Grammarly website.

19. Mobile Apps

Grammarly provides mobile applications and writing support for:

• iPhone
• iPad
• Android

Mobile capabilities include writing assistance, grammar checking, and Grammarly’s mobile writing environment.

20. Brand Tones & Style Guides

For teams and organizations, Grammarly can maintain communication consistency through:

• Brand tones
• Style guides
• Shared snippets
• Organization-specific guidance
• Customized writing recommendations

This allows companies to help employees communicate consistently while still retaining individual writing styles.

21. Snippets

Teams can create reusable messaging snippets for frequently used communication.

Examples include:

• Standard responses
• Customer communication
• Sales messaging
• Internal communication
• Common email language
• Brand-approved phrases

This can improve consistency while reducing repetitive writing.

22. Team Analytics

Grammarly provides analytics for organizations to understand writing performance and improvement opportunities.

Dashboards can provide insight into:

• Team strengths
• Improvement opportunities
• Writing activity
• Communication trends
• Usage and performance

These capabilities are designed primarily for organizations rather than individual users.

23. Superhuman Go

Grammarly is now part of Superhuman, and the company’s newer Superhuman Go product extends Grammarly’s writing intelligence into a broader AI assistant.

Go can work across apps, tabs, and workflows, using context to help users:

• Draft
• Rewrite
• Research
• Summarize
• Respond
• Organize information
• Take actions within supported workflows

This represents Grammarly’s evolution from a standalone writing assistant toward a broader AI productivity platform.