Free
$0
Basic writing help for individuals
- Mistake correction
- tone visibility
- 100 AI prompts/month
Grammarly
AI writing assistant that corrects, rewrites and tone-checks your text across every app
Freemiumgrammarly.comUpdated
About Grammarly
Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, clarity and tone as you write, and suggests rewrites at the word, sentence and paragraph level. It runs as a desktop app for Windows and Mac, as browser extensions for Chrome, Safari, Firefox and Edge, inside Microsoft Office and Google Docs, and as a keyboard on iPhone, iPad and Android, so the same suggestions follow the user across email, documents and messaging apps. The company states it is trusted by 40 million people and 50,000 organizations.
Best for
- Polishing emails and documents in real time across many apps, keeping tone and style consistent across a team
- Email and Message Polishing: Catching errors and adjusting tone in emails, Slack-style chats and social posts as you type.
- Academic Writing: Checking citations, plagiarism and clarity in essays and papers.
- Brand-Consistent Team Writing: Applying shared style guides and brand tones across marketing and support teams.
- Non-Native English Writing: Getting fluent-English rewrites and clearer phrasing suggestions.
- Customer Support Replies: Improving tone and clarity of replies inside support tools such as Zendesk.
Not ideal for
- Creative writers who want minimal intervention, anyone needing a verdict-grade AI-content detector
Popular with
- Students
- Professionals
- Non-native English Writers
- Marketing Teams
- Enterprise Communications Teams
Screenshots
Key features
- Citation Tools
- Style Guides and Brand Tones
- Cross-App Availability
- Enterprise Security Controls
- Grammar and Mistake Correction
- Tone Detection and Adjustment
- Full-Sentence and Paragraph Rewrites
- AI Detector and Humanizer
- Plagiarism Checker
Pros and cons
Pros
- Works across desktop, browser, Office, Google Docs and mobile keyboards, so suggestions follow you between apps.
- Free plan covers core grammar, spelling and tone visibility with 100 AI prompts per month.
- Pro adds tone adjustment, full-sentence rewrites, plagiarism and AI-text detection in a single subscription.
- Team features include style guides, brand tones, analytics and user groups; Enterprise adds SSO, SCIM and audit logs.
- Public REST APIs exist for analytics, licence management, writing score and detection.
Cons
- Monthly billing for Pro is $30, versus $12 per month on annual billing, so month-to-month use costs 2.5 times as much.
- Third-party tests of the AI Detector report notable false-positive rates (figures range from 14.2% to 34% across sources), so it is unreliable as proof.
- An App Store reviewer criticizes the iOS keyboard setup for pushing users to grant broad access.
- Experienced writers on forums report turning off many suggestions; advanced features are gated behind Pro.
Pricing
Plans as listed by the vendor on . Check their site for current prices.
Pro
Most popular$30/month
Individuals and eligible teams wanting advanced rewrites and detection
- 2,000 AI prompts/member/month
- tone adjustment
- full-sentence rewrites
- plagiarism detection
- AI-generated text detection
- style guide
- brand tone
- priority support
Enterprise
Custom/custom
Larger organizations with security and governance needs
- Unlimited AI prompts
- unlimited style guides and brand tones
- SAML SSO
- SCIM
- audit logs API
- data loss prevention
- dedicated support
Our ratings
Scored out of 10 by the Finder Atlas editorial team.
8.2overall
- Ease of Use
- 9.1
- Feature Depth
- 8.3
- Value for Money
- 7.3
- Performance & Speed
- 8.4
- Documentation & Support
- 8.0
Platforms and integrations
Available on
- Web
- macOS
- Windows
- iOS
- Android
- Chrome Extension
- Firefox Extension
- API
Works with
- Microsoft Office
- Google Docs
- Chrome
- Safari
- Firefox
- Edge
- Zendesk
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Release history
Parent company renamed Superhuman after acquiring Coda and Superhuman Mail; Grammarly remains the writing product brand
Parent company renamed Superhuman after acquiring Coda and Superhuman Mail; Grammarly remains the writing product brand.
Company reportedly acquired spreadsheet startup Rows (third-party report)
Company reportedly acquired spreadsheet startup Rows (third-party report).
Reviews
No reviews yet
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Frequently asked questions
Is Grammarly free?
Yes. The Free plan costs $0 and includes basic mistake correction, tone visibility and 100 AI prompts per month. Advanced rewrites, plagiarism detection and AI detection require Pro.
How much does Grammarly Pro cost?
The homepage lists Pro at $12 per member per month billed annually or $30 per month billed monthly, with 2,000 AI prompts per member per month. A trial is offered to eligible users.
Which devices and apps does Grammarly work with?
Windows and Mac desktop apps, Chrome, Safari, Firefox and Edge extensions, Microsoft Office, Google Docs, and a keyboard for iPhone, iPad and Android.
Does Grammarly use my writing to train AI models?
The company states user content is not sold, used for advertising or used to train third-party models. Review the privacy policy and Trust Center for specifics.
What happened to Grammarly and Superhuman?
In October 2025 the company renamed itself Superhuman after acquiring Coda and Superhuman Mail. Grammarly continues as a product within that brand.
Can Grammarly's AI detector prove text was written by AI?
No. Grammarly itself advises it should not be the sole basis for such a decision, and third-party tests report mixed accuracy and false positives.
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