Grammarly Free vs Premium 2026: 5 Hidden Costs You Should Know

Quick Answer

Grammarly Free handles spelling, grammar, and basic punctuation checks reliably. Grammarly Premium adds advanced grammar, clarity improvements, tone detection, full-sentence rewrites, and plagiarism detection. For casual writers, free is sufficient. For professionals writing daily, the premium upgrade delivers measurable value — but compare its cost against standalone AI writing tools before deciding.

What Is Grammarly?

Grammarly is an AI-powered writing assistant that checks your writing for errors and improvements as you type. It operates as a browser extension, desktop app, mobile keyboard, and integrates with Microsoft Word and Google Docs. Used by over 30 million daily active writers, it's one of the most widely deployed writing tools in the world. In 2026, it also includes Grammarly AI — a generative writing assistant similar to ChatGPT, built into the product.

Grammarly's core features:

• Real-time spelling and grammar checking
• Punctuation and clarity suggestions
• Tone detection
• Browser extension (Chrome, Edge, Firefox, Safari)
• Microsoft Word and Google Docs add-in
• Grammarly AI (generative writing)
• Mobile keyboard (iOS and Android)
• Plagiarism detection (Premium/Business only)

Is Grammarly Free Really Free?

Yes, Grammarly Free is permanently free with no time limit or credit card required. Here's the honest breakdown:

Free includes:

• Spelling corrections
• Grammar error detection (basic rules)
• Punctuation fixes (basic commas, periods)
• Conciseness suggestions (some)
• Grammarly AI (limited monthly quota)
• Browser extension + Word/Docs add-in

Premium adds ($12/month billed annually or $30/month monthly):

• Advanced grammar rules (parallel structure, dangling modifiers, etc.)
• Clarity and engagement rewrites
• Delivery and tone adjustments
• Full-sentence rewrites (GrammarlyGO)
• Vocabulary enhancement suggestions
• Consistency checks (style guide enforcement)
• Plagiarism detection (compared to 16B web pages)
• Unlimited Grammarly AI quota
• More detailed writing statistics

Business plan adds admin controls, shared style guides, and analytics for teams.

How to Use Grammarly Free — Step by Step

1. Sign up at grammarly.com: Create a free account with email or Google. No credit card needed.
2. Install the browser extension: Add the Grammarly Chrome (or Edge/Firefox/Safari) extension. It activates automatically in any text field — email, social media, web forms, CMS editors.
3. Install the Microsoft Word or Google Docs add-in: For document editing, install the respective add-in from the store. Grammarly's sidebar appears and updates suggestions in real time.
4. Write or paste text: Start typing or paste existing content. Underlined suggestions appear immediately. Red = spelling/grammar errors; yellow = style suggestions.
5. Review suggestions: Hover over each underlined word or phrase to see the suggestion and explanation. Click to accept or dismiss.
6. Check your writing score: The Grammarly sidebar shows an overall score and categorizes issues. Aim for 90+ before submitting any professional document.
7. Use Grammarly AI (limited free quota): Click the Grammarly AI button to get rewrite suggestions, ask it to "improve this paragraph," or generate new text from a prompt.
8. Mobile keyboard: Install Grammarly Keyboard on iOS or Android for on-the-go corrections in any app. Free features apply here too.

Grammarly Free vs Premium — Feature Comparison

Feature	Free	Premium	Difference
Spelling check	✅ Full	✅ Full	Same
Basic grammar	✅ Full	✅ Full	Same
Advanced grammar	❌ Limited	✅ Full	Significant
Clarity rewrites	❌ Basic	✅ Full	Significant
Tone detection	❌ Basic	✅ Full	Moderate
Plagiarism check	❌ No	✅ Yes	Important for academics
Grammarly AI	Limited quota	Unlimited	Matters for heavy users
Vocabulary suggestions	❌ Limited	✅ Full	Moderate

Best Use Cases for Grammarly Free

1. Email checking: Grammarly Free in Gmail catches typos and basic grammar issues before sending. For professional emails, the free plan prevents embarrassing mistakes.
2. Social media posts: Quick grammar and spelling checks before publishing posts on LinkedIn, Twitter, or Instagram.
3. Job applications: Proofreading cover letters and LinkedIn profiles for obvious errors. The free plan handles the most impactful corrections.
4. Student essays (basic proofreading): Catching spelling and grammar errors before submission. Note: For academic integrity, verify your institution's policy on AI writing tools.
5. Customer service responses: Customer-facing support agents can use Grammarly Free to ensure professional, error-free replies.

Tips and Tricks to Get More from Grammarly Free

1. Set your goals: In the Grammarly editor, configure your audience, formality, domain, and intent. This improves the relevance of suggestions even on the free plan.
2. Use the native Grammarly editor: The full Grammarly Editor at app.grammarly.com provides more detailed scoring and analysis than the browser extension. Paste important documents here.
3. Combine with free AI tools: Use Claude or ChatGPT to rewrite and improve paragraphs, then paste the improved text back through Grammarly Free for final proofreading. You get advanced rewrites for free without Premium.
4. Read every explanation: Grammarly explains why it's suggesting a change. This teaches you recurring mistakes to avoid in future writing, reducing the number of suggestions you need over time.
5. Don't auto-accept all suggestions: Some suggestions, especially style ones, conflict with your intended tone. Review each one critically rather than clicking "Accept All."
6. Use weekly email insights: Grammarly sends weekly performance insights showing your most common mistake types. Use these to identify patterns and improve.

Is Grammarly Premium Worth It?

The answer depends on your writing volume and professional stakes:

• Yes if: You write professional content daily (emails, reports, proposals), you're a content writer or marketer, you need plagiarism detection, or you want full AI rewriting built into your workflow.
• No if: You're a casual writer, you combine ChatGPT/Claude with Grammarly Free, or you primarily write informal content.

For $144/year (annual Premium), compare: Claude Pro ($20/month) or ChatGPT Plus ($20/month) each provide better AI writing assistance than Grammarly Premium's AI features, though they lack native browser extension integration.

Conclusion

Grammarly Free is a solid baseline proofreader that every writer should have installed. For advanced writing assistance, the combination of Grammarly Free + a free AI writing tool like Claude or ChatGPT often outperforms Grammarly Premium at lower cost. If you want a single AI platform handling writing, research, and content creation without juggling multiple tools, Assisters.dev provides an all-in-one alternative worth evaluating.