GrammarlyvsQuillbot
Two writing assistant tools, the same questions. Every answer comes from the official pages, with the date we checked. Nothing here is ranked.
last check 2026-10-11
Grammarly
by Superhuman Platform
Writing assistant that checks grammar, spelling and tone as you type, rewrites sentences and drafts text with AI in apps and browsers.
All Grammarly factsQuillbot
by Learneo, Inc.
Set of AI writing tools built around a paraphraser, with grammar checking, humanizing, AI detection, plagiarism checks, summaries and chat.
All Quillbot factsWhere they differ
- Free plan limitsGrammarly: 100 generative AI prompts a month on Free (Pro: 2,000 per member).Quillbot: Paraphrasing up to 125 words in 2 modes, summaries up to 1,200 words, 20 AI Chat queries a day.
- Used to train AIGrammarly: On by default for individual users: content is used to train models and improve the product unless switched off., Off by default for Enterprise, Education and business accounts bought through the sales team.Quillbot: Individual accounts: inputs are used for training and personalization by default., Team Plan: text inputs are not used for training.
- LanguagesGrammarly: Writing guidance in over 20 languages, including Spanish, French, Portuguese, German and Italian.Quillbot: Grammar checks in English, German, Spanish and French.
- Works inGrammarly: Browser extension, Microsoft Word, Pages, Email clients, Google DocsQuillbot: Browser extension, Microsoft Word
Same answer, but for different plans or with different conditions: plagiarism check. The table below shows the conditions.
Same answer for both: free plan, platforms, grammar and spelling, rewrite and change tone, writes new text.
Plans and prices
As listed on each official pricing page, in the currency we were shown. No conversion, no rounding.
Grammarly
- Free Free plan$0.00 / month
- Pro Paid, individual$30.00 / month
- Enterprise EnterprisePrice not confirmed
Quillbot
- Free Free plan$0.00 / month
- Premium Paid, individualPrice not confirmed
- Team TeamPrice not confirmed
Full comparison with sources
| Writing assistant | ||
| What it is for | ||
| What it is for | Writing assistant that checks grammar, spelling and tone as you type, rewrites sentences and drafts text with AI in apps and browsers. | Set of AI writing tools built around a paraphraser, with grammar checking, humanizing, AI detection, plagiarism checks, summaries and chat. |
| Good for | ||
| Editor's suggestion | No editor suggestion yet | No editor suggestion yet |
| Cost | ||
| Free planA free plan that is not time-limited. Trials are listed separately. |
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| Plans and pricesOriginal currency and billing period. No conversion. |
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| Input and output | ||
| LanguagesLanguages it transcribes or speaks, as stated. |
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| Grammar and spellingMarks grammar, spelling and punctuation mistakes and suggests fixes. |
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| Rewrite and change toneRewrites a sentence or paragraph, for example shorter, more formal or friendlier. |
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| Writes new textDrafts new text from a short instruction, not only fixes what you wrote. |
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| Checking facts | ||
| Plagiarism checkCompares your text with published sources and shows matches. |
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| Workflow | ||
| PlatformsWhere the product is offered: web, desktop app, mobile app, or editor extension. |
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| Works inApps and places it works in, such as a browser extension, Word or Google Docs, as officially listed. |
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| Sources and confidence | ||
| Confidence | Last checked 2026-10-11 All compared fields have a confirmed value. | Last checked 2026-10-11 All compared fields have a confirmed value. |
What it is for
What it is for
Grammarly:
Writing assistant that checks grammar, spelling and tone as you type, rewrites sentences and drafts text with AI in apps and browsers.
Quillbot:
Set of AI writing tools built around a paraphraser, with grammar checking, humanizing, AI detection, plagiarism checks, summaries and chat.
Editor's suggestion
Grammarly:
No editor suggestion yetQuillbot:
No editor suggestion yetCost
Free plan
A free plan that is not time-limited. Trials are listed separately.
Grammarly:
- Supportedsupport.grammarly.comchecked 2026-10-11
Free plan
Quillbot:
- Supportedhelp.quillbot.comchecked 2026-10-11
Free plan
Plans and prices
Grammarly:
- Free (Free plan)$0.00 / month
- Pro (Paid, individual)$30.00 / month
- Enterprise (Enterprise)Price not confirmed
- All plan details and sources
Quillbot:
- Free (Free plan)$0.00 / month
- Premium (Paid, individual)Price not confirmed
- Team (Team)Price not confirmed
- All plan details and sources
Input and output
Languages
Languages it transcribes or speaks, as stated.
Grammarly:
- Writing guidance in over 20 languages, including Spanish, French, Portuguese, German and Italian.grammarly.comchecked 2026-10-11
Quillbot:
- Grammar checks in English, German, Spanish and French.help.quillbot.comchecked 2026-10-11
Grammar and spelling
Marks grammar, spelling and punctuation mistakes and suggests fixes.
Grammarly:
- Supportedgrammarly.comchecked 2026-10-11
Plan not specified
Quillbot:
- Supportedquillbot.comchecked 2026-10-11
Plan not specified
Rewrite and change tone
Rewrites a sentence or paragraph, for example shorter, more formal or friendlier.
Grammarly:
- Supportedgrammarly.comchecked 2026-10-11
Plan not specified
Quillbot:
- Supportedhelp.quillbot.comchecked 2026-10-11
Plan not specified
Writes new text
Drafts new text from a short instruction, not only fixes what you wrote.
Grammarly:
- Supportedgrammarly.comchecked 2026-10-11
Plan not specified
Quillbot:
- Supportedquillbot.comchecked 2026-10-11
Plan not specified
Checking facts
Plagiarism check
Compares your text with published sources and shows matches.
Grammarly:
- Supportedsupport.grammarly.comchecked 2026-10-11
Plans: Pro, Enterprise
Quillbot:
- Supportedhelp.quillbot.comchecked 2026-10-11
Plans: Premium, Team
Workflow
Platforms
Where the product is offered: web, desktop app, mobile app, or editor extension.
Grammarly:
- Web, Desktop app, Mobile appsupport.grammarly.com +2checked 2026-10-11
Quillbot:
- Web, Desktop app, Mobile apphelp.quillbot.com +1checked 2026-10-11
Works in
Apps and places it works in, such as a browser extension, Word or Google Docs, as officially listed.
Grammarly:
- Browser extension, Microsoft Word, Pages, Email clients, Google Docsgrammarly.com +2checked 2026-10-11
Quillbot:
- Browser extension, Microsoft Wordquillbot.comchecked 2026-10-11
Sources and confidence
Confidence
Grammarly:
Last checked 2026-10-11
All compared fields have a confirmed value.
Quillbot:
Last checked 2026-10-11
All compared fields have a confirmed value.