Bottom line: Grammarly Free catches basic errors and is worth using for anyone who writes in English. Grammarly Premium is worth it for professionals, students and non-native speakers who write frequently. The AI rewrite features alone justify the cost for most users.
What is Grammarly?
Grammarly is an AI-powered writing assistant that checks grammar, spelling, punctuation, clarity, tone and plagiarism. It works as a browser extension, desktop app, mobile keyboard and Microsoft Word/Google Docs plugin — covering virtually every place you write.
Launched in 2009, Grammarly now has over 30 million daily active users and is one of the most widely used writing tools in the world.
Grammarly Free vs Premium — key differences
| Feature | Free | Premium |
|---|---|---|
| Grammar & spelling | ✅ | ✅ |
| Punctuation | ✅ | ✅ |
| Conciseness suggestions | ❌ | ✅ |
| Clarity improvements | ❌ | ✅ |
| Tone detection | Limited | ✅ Full |
| Vocabulary enhancement | ❌ | ✅ |
| Plagiarism checker | ❌ | ✅ |
| AI rewrites (GrammarlyGO) | Limited | ✅ Unlimited |
| Formatting suggestions | ❌ | ✅ |
| Priority support | ❌ | ✅ |
| Price | Free | ~$12/mo (annual) |
What Grammarly Free actually covers
Grammarly Free is genuinely useful — not a watered-down demo. It catches:
- Spelling errors and typos
- Basic grammar mistakes (subject-verb agreement, wrong tense)
- Missing punctuation
- Commonly confused words (their/there/they’re)
For casual writing — emails, social media, quick messages — the free plan is sufficient. The browser extension alone makes it one of the most useful free tools available.
What you get with Grammarly Premium
Premium is where Grammarly becomes a real writing upgrade. The most valuable Premium features:
Clarity and conciseness
Grammarly flags sentences that are too wordy and suggests tighter rewrites. This is the feature that most improves writing quality — especially for non-native English speakers.
GrammarlyGO (AI writing)
The AI assistant can rewrite entire paragraphs, adjust tone (formal/casual/confident), generate reply suggestions and expand bullet points into full sentences. It’s genuinely useful for email and professional writing.
Tone detection
Grammarly analyzes your tone across a document — flagging if something sounds too harsh, too passive or inconsistent. Useful for professional communications.
Plagiarism checker
Compares your text against 16 billion web pages. Essential for students and content creators.
Grammarly Premium pricing
- Monthly — $30/mo
- Quarterly — $20/mo (billed $60)
- Annual — $12/mo (billed $144) — best value
- Business — $15/user/mo (3+ members, team features)
💡 Grammarly frequently offers 40-50% discount codes. Check before purchasing.
Who should upgrade to Premium?
Definitely worth it for:
- Non-native English speakers who write professionally
- Students writing essays and research papers
- Content creators and bloggers
- Professionals who write frequent emails and reports
- Anyone applying for jobs (cover letters, LinkedIn)
Stick with Free if:
- You only write casually
- You’re a native speaker with strong grammar fundamentals
- You use another tool like ProWritingAid
Grammarly alternatives
| Tool | Best for | Price |
|---|---|---|
| ProWritingAid | Deep style analysis | $10/mo |
| Hemingway Editor | Readability focus | $19.99 one-time |
| LanguageTool | Multi-language support | Free / $5.42/mo |
| QuillBot | Paraphrasing & summarizing | Free / $9.95/mo |
For most users, Grammarly remains the best overall choice due to its browser integration and breadth of features.
Our verdict
Grammarly Free: 4.5/5 — The best free grammar checker available. Install it regardless of whether you upgrade.
Grammarly Premium: 4/5 — Worth the annual plan price for frequent professional writers. The AI rewrite and clarity features alone save significant editing time.
Frequently Asked Questions
Is Grammarly free worth it?
Yes — Grammarly Free is one of the most useful free tools available for anyone writing in English. The browser extension alone catches errors in emails, forms and social media.
Is Grammarly Premium worth the money?
For professionals, students and non-native English speakers who write regularly, yes. The annual plan at ~$12/mo is reasonable for the productivity gains.
Does Grammarly work with Google Docs?
Yes. Grammarly has a dedicated Google Docs integration that works in your browser.
Is Grammarly safe to use?
Yes. Grammarly processes text to provide suggestions but does not store or sell your writing. Premium and Business plans include additional data privacy protections.
What’s the difference between Grammarly and ProWritingAid?
Grammarly is better for real-time, everyday writing. ProWritingAid is better for in-depth style analysis on longer documents like books or research papers.
Last updated: February 2026. Pricing subject to change — check Grammarly’s official site for current offers.
