[Faz] Everyone knows Grammarly catches typos. That’s the pitch from a decade ago. In 2026, Grammarly is an AI writing assistant that rewrites sentences, detects tone, generates content with GrammarlyGO, and sits inside basically every app you use. The real question isn’t “does it fix grammar?” It’s whether the AI features are worth paying for, or if the free plan still does enough. We tested it alongside every tool in our best AI rewriting tools list, and here’s the full picture.
What Grammarly Does
Grammarly is a writing assistant that checks your text for grammar, spelling, punctuation, clarity, tone, and style issues. It works across your browser, desktop apps, mobile keyboard, and email client. The AI layer (GrammarlyGO) adds full-sentence rewrites, tone adjustments, and content generation directly inside whatever you’re writing in.
The difference between Grammarly and a pure rewriting tool like QuillBot is scope. QuillBot rewrites your text into a different version. Grammarly improves your text by fixing specific problems. It’s less about creating a new version and more about making your existing version better.
Key Features
Real-Time Grammar and Spelling
The foundation. Grammarly catches grammar mistakes, spelling errors, punctuation issues, and commonly confused words as you type. It works inline with underlines and suggestions, similar to Word’s spellcheck but significantly smarter. The free plan covers basic correctness checks.
Clarity and Conciseness Suggestions (Premium)
Goes beyond grammar to flag wordy phrases, passive voice, unclear sentences, and hedging language. These suggestions are the real value of Premium for most writers. Instead of just telling you what’s wrong, Grammarly shows you how to tighten your writing.
Tone Detection
Grammarly analyzes your text and tells you how it comes across: confident, friendly, formal, direct, concerned, etc. This updates in real time as you write. Useful for emails and client communication where tone matters but you can’t always tell how your writing reads to others.
GrammarlyGO (AI Assistant)
Grammarly’s generative AI feature. You can ask it to rewrite text, change tone, make text longer or shorter, generate replies to emails, or create new content from a prompt. Free users get limited prompts per month. Premium users get more. This is Grammarly’s answer to ChatGPT and it works directly inside the Grammarly editor rather than requiring a separate tab.
Full-Sentence Rewrites (Premium)
Highlights entire sentences that could be improved and offers a one-click rewritten version. This isn’t just fixing a grammar error; it’s restructuring the sentence for clarity and impact. This is where Grammarly overlaps with rewriting tools, though it’s more conservative than QuillBot’s Creative mode.
Plagiarism Detection (Premium)
Checks your text against billions of web pages and academic databases. Reports how much of your content matches existing sources and highlights the specific passages. Useful for students, content writers, and anyone publishing original work.
Integrations
Grammarly works in more places than any other writing tool:
- Browser extensions (Chrome, Firefox, Safari, Edge)
- Desktop apps (Windows, Mac)
- Mobile keyboard (iOS, Android)
- Microsoft Office (Word, Outlook)
- Google Docs (native integration)
- IDE plugins (VS Code, JetBrains)
- Email clients (Gmail, Outlook)
Pricing Breakdown
| Plan | Price | What You Get |
|---|---|---|
| Free | $0 | Basic grammar/spelling, tone detection, limited GrammarlyGO prompts |
| Premium Monthly | $30/mo | Full grammar, clarity, tone, full-sentence rewrites, plagiarism detection, more GrammarlyGO |
| Premium Annual | $12/mo ($144/yr) | Same as Premium Monthly |
| Business | $15/user/mo (annual) | Everything in Premium + team features, style guide, analytics, admin controls |
Hidden limits to know about:
- GrammarlyGO prompts are limited on the free plan. Grammarly doesn’t publish the exact number, but users report running out within a few days of regular use.
- The Premium monthly price ($30/mo) is steep. Annual billing ($12/mo) is a 60% discount, making monthly a poor deal for regular users.
- Plagiarism detection is Premium-only with no standalone option. If that’s all you need, dedicated tools are cheaper.
- The mobile keyboard works for basic corrections but the AI features are limited on mobile.
- Business plan requires minimum 3 users (was 5 previously).
Who This Is For
Use Grammarly if you:
- Want an always-on writing assistant that works everywhere you type
- Need grammar checking as your primary feature with AI rewriting as a bonus
- Write a lot of emails and want tone detection and smart replies
- Are a non-native English speaker who needs constant feedback on grammar and style
- Want a single tool that covers grammar, rewriting, and plagiarism checking
Skip Grammarly if you:
- Only need paraphrasing/rewriting (QuillBot is better and cheaper for that)
- Want aggressive rewriting with multiple modes and fine control
- Need team brand voice management (look at Hypotenuse AI)
- Already have a grammar checker you’re happy with (most word processors have decent ones now)
- Can’t justify $12-30/mo for writing assistance
Pros and Cons
Pros
- Works everywhere: browser, desktop, mobile, email, docs, IDEs
- Tone detection is genuinely useful for professional communication
- Free plan is more generous than most competitors
- Full-sentence rewrites are contextually smart (not random paraphrasing)
- 30+ million users means the product is stable and well-maintained
Cons
- Premium pricing ($30/mo monthly) is high compared to competitors
- GrammarlyGO prompt limits on free plan are frustratingly unclear
- Can be overly cautious with suggestions (sometimes flags correct writing)
- Rewriting capabilities are more conservative than dedicated paraphrasing tools
- Privacy concerns: your text is processed on Grammarly’s servers
[Faz’s Take] Grammarly isn’t a rewriting tool. It’s a writing bodyguard. It watches everything you type and catches mistakes before anyone else sees them. The AI rewriting features are solid but conservative. If you need to completely rephrase a paragraph, use QuillBot. If you need someone looking over your shoulder catching the stuff you miss, Grammarly is the best in the business. The real value is the integrations. It’s the only tool on this list that works literally everywhere you write.
[Saru’s Verdict] 4.3/5. Highest meaning preservation score (5.0/5) in our testing because Grammarly’s rewrites are deliberately conservative. It improves your text without changing what you’re saying. Readability (4.5) and tone consistency (4.5) are strong. The lower originality score (3.5) reflects that conservative approach. At $12/mo annual, it’s priced between QuillBot ($8.33) and Wordtune ($13.99), which is fair for the broader feature set.
Frequently Asked Questions
Is Grammarly free?
Yes, Grammarly has a free plan that includes basic grammar and spelling checks, tone detection, and limited GrammarlyGO prompts. The free plan works indefinitely with no credit card required. You’ll miss clarity suggestions, full-sentence rewrites, and plagiarism detection, but the basic checks are solid for everyday writing.
Is Grammarly worth paying for?
Depends on how much you write. If you send dozens of emails, write reports, or create content daily, Premium’s clarity suggestions and full-sentence rewrites save real time. If you write occasionally and just need typo catching, the free plan is probably enough. The annual plan ($12/mo) makes it much more justifiable than the $30/mo monthly rate.
Does Grammarly work with Google Docs?
Yes. Grammarly has a native Google Docs integration through both a browser extension and a direct Docs add-on. It shows suggestions inline, just like it does in other applications. The integration has improved significantly. Earlier versions were glitchy, but the current version works reliably.
Is Grammarly safe? Does it read my data?
Grammarly processes your text on their servers to provide suggestions. Their privacy policy states they don’t sell user data and delete text after processing. For Enterprise/Business plans, there are additional data controls and compliance certifications (SOC 2, GDPR). If you’re writing highly sensitive content (legal, medical, financial), check whether your organization’s data policy allows cloud-based writing tools.
Grammarly vs QuillBot: which should I get?
Different tools for different needs. Grammarly is better for overall writing improvement (grammar, clarity, tone, integrations). QuillBot is better for paraphrasing and rewriting (7 modes, synonym slider, paragraph-level rewriting). Many serious writers use both. We cover this in depth in our Grammarly vs QuillBot comparison.
Can Grammarly detect AI-generated text?
Grammarly added an AI detection feature for Business and Education plans. It flags content that appears to be AI-generated. However, this is designed for organizations checking submitted content, not for individual users. If you’re worried about your own AI-assisted writing being detected, the detection tool isn’t available on free or individual Premium plans.
Does Grammarly work on mobile?
Yes. Grammarly has a mobile keyboard for iOS and Android that provides grammar checking across all apps. The keyboard works for basic corrections, but AI features like GrammarlyGO and full-sentence rewrites are more limited on mobile than desktop. The mobile app also includes a dedicated editor for longer writing tasks.
Final Verdict
Grammarly is the most complete writing assistant available in 2026. It’s not the best at any single thing: QuillBot paraphrases better, dedicated grammar tools are cheaper, and ChatGPT generates content more flexibly. But no other tool covers as much ground in as many places. The free plan is genuinely useful. Premium is worth it for daily writers at $12/mo annual. If you write anything that other people read (emails, docs, posts, messages), Grammarly makes it better with minimal effort.
Rating: 4.3/5
Written by
FazFaz is the founder of AIToolsBakery. Every tool on this site is personally tested with real-world writing tasks before a single word gets published. No sponsored rankings, no recycled press releases.
Read more about how we test →- Works everywhere: browser, desktop, mobile, email, docs, IDEs
- Tone detection is genuinely useful for professional communication
- Free plan is more generous than most competitors
- Full-sentence rewrites are contextually smart (not random paraphrasing)
- 30+ million users means the product is stable and well-maintained
- Premium pricing ($30/mo monthly) is high compared to competitors
- GrammarlyGO prompt limits on free plan are frustratingly unclear
- Can be overly cautious with suggestions (sometimes flags correct writing)
- Rewriting capabilities are more conservative than dedicated paraphrasing tools
- Privacy concerns: your text is processed on Grammarly's servers
- Rebranded to Superhuman (Oct 2025) causing brand confusion
- $5M lawsuit filed March 2026
Frequently Asked Questions
