Grammarly
The AI writing assistant for clear, confident communication.
By Sher Min · Co-founder · Editorial & Technical SEO
Grammarly is the leading AI writing assistant, helping millions of users write with greater clarity, correctness, and confidence across virtually every platform they work in. Its real-time suggestions cover grammar, spelling, tone, and style — with advanced AI rewrites and plagiarism detection available on paid plans. Worth noting: the most powerful writing suggestions are reserved for Pro subscribers, and some suggestions may not align with deliberate stylistic choices in creative or informal writing.
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Our Rating
8.8/10
Pricing
Free plan available · Pro from $12/month
Best For
Professionals, students & non-native speakers
Category
Productivity
Quick Verdict
The strongest AI writing assistant for everyday professional communication — and the only one that works across 500,000+ apps without copy-pasting. The free tier handles basic corrections reliably. Pro at $12/month (annual) unlocks AI rewrites, tone tools, and plagiarism detection — worth it for anyone who writes daily in a professional context.
Key Facts
| Tool | Grammarly |
| Company | Grammarly, Inc. |
| Best for | Professionals, students, non-native English speakers, and writing teams |
| Starting price | Free; Pro from $12/month (annual) |
| Main limitation | Advanced features gated to Pro; primarily English-only; may over-suggest on creative writing |
| Last verified | May 10, 2026 |
Pros & Cons
What works
- Real-time grammar, spelling, and punctuation corrections across 500,000+ apps and websites
- Tone detection and clarity suggestions help professionals tailor writing to any audience
- Deep browser and OS integrations — works seamlessly in Gmail, Google Docs, Word, Slack, and more
- Grammarly AI delivers AI-powered rewrites, brainstorming, and drafts from a short prompt
What doesn't
- Advanced suggestions — plagiarism detection, full-sentence rewrites, and tone transformation — are reserved for Pro and Enterprise plans
- Occasional over-suggestions on casual or creative writing where rule-bending is intentional
- Primarily designed for English; multilingual writing support is limited
- Grammarly AI generation quality may vary on highly technical or niche subject matter
Pricing
| Plan | Price | Best For |
|---|---|---|
| Free | $0/month | Everyday grammar and spelling corrections |
| Pro | $12/month (annual) · $30/month (monthly) | Individual professionals, writers, and students needing advanced suggestions, plagiarism detection, and AI rewrites |
| Enterprise | Custom | Large organisations with SSO, advanced security, dedicated support, and compliance needs |
Who It's For
Instantly improves email, reports, and presentations without interrupting workflow
Grammar guidance plus plagiarism detection covers most academic writing needs
Contextual explanations help learners understand why corrections are made, not just what to fix
Tone and clarity tools help maintain brand-aligned writing across team content
Helpful for proofing but suggestions may conflict with intentional stylistic decisions
How It Compares
| Dimension | Grammarly | ProWritingAid | ChatGPT |
|---|---|---|---|
| Grammar & Spelling | Best | Excellent | Good |
| AI Rewrites | Good | Good | Excellent |
| Plagiarism Check | Yes (Pro+) | Yes | No |
| Integrations | Excellent (500k+ apps) | Good | Limited |
| Team Features | Good (paid tiers) | Limited | None |
| Price (Pro) | $12/mo (annual) | $10/mo (annual) | $20/mo |
Our Rating
Our Verdict
Grammarly earns its 8.8 rating by delivering genuinely useful writing improvements at a scale no competitor matches — 500,000+ integrations means it works wherever you do, and its real-time feedback loop is fast enough to not break flow. The Pro plan is where the tool becomes most powerful, unlocking full AI rewrites, plagiarism detection, and advanced tone tools, making it a worthwhile investment for anyone who writes frequently in a professional context. Casual writers and those who work primarily in non-English languages may find the free tier covers their needs, while creative writers should expect to exercise judgment on suggestions that challenge stylistic choices.
Try GrammarlyAffiliate Disclosure: ToolNav earns a commission from qualifying purchases made through links on this page. This does not affect our editorial rating or recommendation. Pricing verified May 10, 2026 — may vary by region; always confirm at Grammarly's official site before purchasing.
Frequently Asked Questions
Is Grammarly free?
Yes — the free plan corrects grammar, spelling, and punctuation in real time across browsers and apps. It's genuinely useful for everyday email and documents. Pro ($12/month annual) adds AI-powered full sentence rewrites, tone adjustment, plagiarism detection, and advanced clarity suggestions — the features that make Grammarly meaningfully better than a built-in spellchecker.
Grammarly vs ChatGPT for writing — which is better?
Different tools for different jobs. Grammarly works inline in every app you're already using — Gmail, Google Docs, Slack, Word — catching errors in real time as you write. ChatGPT requires you to bring it your text, but produces stronger rewrites and more creative suggestions. The strongest workflow combines both: write and edit in your app with Grammarly active, then bring specific paragraphs to ChatGPT when you need deeper restructuring.
Is Grammarly Pro worth $12/month?
Yes for most professional writers. The AI rewrite feature alone — which restructures weak sentences rather than just flagging them — is worth the upgrade for anyone writing reports, proposals, or client-facing content regularly. The annual plan at $12/month is the right tier for individuals; monthly ($30) only makes sense for short-term intensive use.
Does Grammarly check for plagiarism?
Yes — plagiarism detection is included on the Pro plan. It checks your writing against billions of web pages and academic sources, which is particularly useful for students and content creators who want to ensure originality before publishing. It is not available on the free plan.
Where does Grammarly work?
Grammarly works across 500,000+ apps and websites via its browser extension (Chrome, Safari, Firefox, Edge) and desktop apps (Mac, Windows). It integrates directly into Gmail, Google Docs, Microsoft Word, Outlook, Slack, Notion, and most other writing surfaces without any copy-pasting. The Microsoft Word integration requires the desktop add-in.
Who should NOT use Grammarly?
Creative and literary writers who intentionally bend grammar rules may find Grammarly's suggestions intrusive — it will flag stylistic choices as errors. Non-English writers will find limited support, as Grammarly is primarily built for English. Teams that need AI drafting rather than AI editing are better served starting with Claude or ChatGPT for generation, then using Grammarly for polish.
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