Grammarly vs QuillBot (2026): The Honest Comparison

Grammarly Premium costs approximately $144 per year on annual billing. QuillBot Premium costs approximately $50 per year on the same billing cycle. That is a $94 annual difference for two tools that most people think do the same job.

They do not. Grammarly is a grammar checker, style editor, and writing assistant that integrates into your browser, Microsoft Word, Google Docs, and over 500,000 other apps. It corrects errors as you type in real time. QuillBot is a paraphrasing engine and text rewriter. It takes content you paste into it and rewrites it — changing sentence structure, vocabulary, and tone. It does not correct grammar errors in real time across your workflow.

Understanding this distinction is the most important thing in any grammarly vs quillbot comparison. Most people who ask which is better are actually asking which one they need — and the answer depends entirely on what they are trying to do. This honest comparison gives you the specific framework to make the right choice, including what each free plan actually lets you do before spending anything.

7-day free trial of Grammarly Pro

Grammarly vs QuillBot: Quick Verdict

Grammarly

4.7/5

Premium ~$12/month (annual)

Best for: writers, professionals, students, and anyone who wants real-time grammar, style, and clarity improvements across all their writing apps

QuillBot

4.5/5

Premium ~$4.17/month (annual)

Best for: students, researchers, and content creators who need to paraphrase, summarise, or rewrite existing text quickly

Bottom line: If you write original content and want it to be error-free, clear, and professional — Grammarly is the correct tool. If you need to rephrase existing text, avoid repetition, summarise sources, or rewrite content in a different tone — QuillBot is the correct tool. Many serious writers and students use both. If budget allows only one, the choice depends on your primary task: editing original writing (Grammarly) or rewriting existing text (QuillBot).

The Core Difference: What Each Tool Actually Does

Before comparing features, pricing, or free plans, understanding the fundamental difference between these two tools prevents the most common mistake people make when choosing between them.

What Grammarly Does

Grammarly is a writing assistant that monitors your text as you write and flags errors, suggestions, and improvements in real time. It integrates directly into your browser (Chrome, Firefox, Safari, Edge), Microsoft Word, Google Docs, Outlook, Gmail, LinkedIn, Slack, and over 500,000 other applications via browser extension. You write in your normal environment — Grammarly sits alongside and suggests improvements as each sentence appears.

Grammarly checks for: spelling errors, grammar mistakes, punctuation errors, sentence clarity, conciseness, tone of voice, word choice, engagement, delivery style, and (on the Premium plan) plagiarism. It does not rewrite your content — it suggests improvements to what you have written and you accept or reject each suggestion individually.

What QuillBot Does

QuillBot is a paraphrasing tool. You paste text into QuillBot’s web interface, select a paraphrasing mode (Standard, Fluency, Formal, Academic, Simple, Creative, or Shorten), and QuillBot rewrites the text with different vocabulary and sentence structures while preserving the original meaning. It is not a real-time writing assistant — it is a text transformation engine that processes existing content.

QuillBot’s additional tools include: a summariser (condenses long text into key points), a grammar checker (separate from the paraphraser), a plagiarism checker (Premium only), a citation generator, and a translation tool. The paraphraser is the core product and what most users come to QuillBot for.

When You Need Both

Many professional writers, students, and content creators use both tools for different stages of the same workflow. Grammarly handles original drafting — catching errors and improving clarity as new content is written. QuillBot handles revision — restructuring sentences that feel repetitive, adjusting tone for different audiences, or condensing lengthy source material into a usable summary. The tools are complementary rather than competitive for this type of user.

Grammarly vs QuillBot: Full Side-by-Side Comparison

Feature	Grammarly	QuillBot
Primary function	Real-time grammar, spelling, style, and clarity checking	Paraphrasing, text rewriting, and summarising
Free plan	Yes — grammar and spelling checks, limited suggestions	Yes — 125 words per paraphrase, 3 paraphrase modes, summariser
Premium price (annual)	~$12/month (~$144/year)	~$4.17/month (~$50/year)
Premium price (monthly)	~$30/month	~$9.99/month
Real-time editing	✅ Yes — integrates into all writing environments	❌ No — paste-and-rewrite only
Browser extension	✅ Yes — Chrome, Firefox, Safari, Edge	❌ No native extension (web interface only)
Microsoft Word integration	✅ Yes — native add-in	❌ No
Google Docs integration	✅ Yes — native	⚠️ Limited — requires copy-paste workflow
Grammar checker	✅ Advanced — real-time, contextual	⚠️ Basic — available but secondary to paraphraser
Paraphrasing	❌ Not a paraphrasing tool	✅ Core feature — 8 modes on Premium
Summariser	❌ Not available	✅ Yes — included on free and Premium
Plagiarism detection	✅ Premium only — checks against 16B web pages	✅ Premium only — checks against ProQuest database
Tone detection	✅ Yes — identifies and adjusts tone	⚠️ Limited — tone modes in paraphraser only
Citation generator	❌ No	✅ Yes — APA, MLA, Chicago, Harvard
Translation	❌ No	✅ Yes — 30+ languages
AI writing assistant	✅ GrammarlyGO — generates and rewrites text (Premium)	✅ Co-Writer — AI drafting feature
AI writing assistant	✅ GrammarlyGO — generates and rewrites text (Premium)	✅ Co-Writer — AI drafting feature
Best for	Professionals, writers, students needing workflow-integrated editing	Students, researchers, content creators needing text transformation

Free Plan Comparison: What You Actually Get Without Paying

Both Grammarly and QuillBot offer free plans that are genuinely useful — not crippled trials. Understanding what each free plan includes helps you decide whether a paid upgrade is necessary for your use case.

Grammarly Free

Grammarly’s free plan includes: real-time spelling correction, basic grammar and punctuation checks, conciseness suggestions, and tone detection across all integrations — browser extension, Microsoft Word, Google Docs, and mobile app. These features work everywhere Grammarly is installed with no usage limits.

What the free plan does not include: advanced clarity and engagement suggestions, vocabulary enhancement, sentence rewriting suggestions, plagiarism detection, tone adjustment tools, GrammarlyGO AI writing assistance, and the full suite of style improvements. For a user who primarily needs spelling and basic grammar catching, Grammarly Free is genuinely useful for an indefinite period.

QuillBot Free

QuillBot’s free plan includes: paraphrasing up to 125 words per request, 3 paraphrase modes (Standard, Fluency, and Simple), the summariser tool with no word limit on summaries, the citation generator for APA, MLA, Chicago, and Harvard formats, and basic translation. These are all available without a subscription.

The 125-word limit per paraphrase is the primary constraint. For a single sentence or short paragraph, 125 words is adequate. For a 500-word essay section or a long research passage, the free plan requires working in multiple chunks — manageable but time-consuming. What the free plan excludes: 5 additional paraphrase modes (Academic, Creative, Formal, Shorten, Custom), unlimited paraphrase length, plagiarism detection, and faster processing.

Use Case	Grammarly Free	QuillBot Free	Winner
Catching spelling errors in emails	✅ Full coverage — works everywhere	❌ Not a real-time checker	Grammarly
Paraphrasing a paragraph	❌ Not a paraphrasing tool	✅ Up to 125 words free	QuillBot
Summarising a long article	❌ Not available	✅ Unlimited summariser	QuillBot
Grammar checking a short document	✅ Basic — works in Google Docs	⚠️ Paste-in only — limited	Grammarly
Generating a citation	❌ Not available	✅ All major formats free	QuillBot
Translating text	❌ Not available	✅ 30+ languages free	QuillBot
Writing a professional email	✅ Real-time suggestions in Gmail	❌ Not workflow-integrated	Grammarly

Grammarly vs QuillBot Pricing: The Full Cost Breakdown

Plan	Grammarly	QuillBot	Annual Saving with QuillBot
Free	$0 — grammar and spelling only	$0 — 125-word paraphraser + summariser	N/A — different tools
Premium (monthly billing)	~$30/month	✅ Up to 125 words free	~$240/year
Premium (annual billing)	~$12/month (~$144/year)	~$4.17/month (~$50/year)	~$94/year
Teams/Business	~$25/member/month (annual)	~$6.67/month (annual, 3-member min)	Varies by team size

Prices are approximate USD figures. Grammarly frequently offers promotional pricing for new subscribers. QuillBot offers a semi-annual plan (~$6.67/month) between monthly and annual. Visit grammarly.com/plans and quillbot.com/pricing for current pricing in your region.

The annual billing comparison is the most relevant for most users: Grammarly Premium at $144/year versus QuillBot Premium at $50/year. The $94 difference per year is significant for students and freelancers on a budget. However, comparing them purely on price misses the point — they are different tools. The correct question is whether the features you specifically need justify the cost of each, not which is cheaper in the abstract.

Grammar Checking: Grammarly Has a Significant Edge

Grammarly’s grammar checking capability is the most advanced available in any consumer writing tool. It goes beyond surface-level spelling and punctuation — it analyses sentence structure, identifies ambiguous constructions, flags passive voice overuse, detects wordy phrases, and provides specific explanations for every suggestion. The contextual intelligence means Grammarly understands that “I saw her duck” is ambiguous and can flag it, while a basic spell-checker cannot.

QuillBot includes a grammar checker as a separate tool from its paraphraser. In independent accuracy tests comparing the two — including tests published by GPTZero, a site that appears in the top 10 SERP for this keyword — Grammarly consistently identifies more errors and provides more actionable corrections. QuillBot’s grammar checker is adequate for catching basic errors but is not a substitute for Grammarly if grammar accuracy is your primary requirement.

For a student writing an academic essay, a professional drafting a business proposal, or a non-native English speaker trying to write correctly in English, Grammarly’s grammar checking capability is meaningfully stronger than QuillBot’s.

Paraphrasing: QuillBot Wins — Grammarly Does Not Compete

QuillBot’s paraphraser is the best consumer paraphrasing tool available. This is not a close comparison — Grammarly does not offer a paraphrasing tool at all. QuillBot offers 8 paraphrasing modes on the Premium plan: Standard, Fluency, Formal, Academic, Simple, Creative, Shorten, and Custom. Each mode changes not just the vocabulary but the syntactic structure and register of the rewritten text.

The Academic mode is particularly strong for students — it rewrites text using academic vocabulary and formal sentence structures appropriate for university-level writing. The Shorten mode is valuable for summarising and condensing long passages. The Custom mode allows users to set their own synonym preference level, controlling how aggressively QuillBot changes the original wording.

GrammarlyGO — Grammarly’s AI writing feature on the Premium plan — can rewrite and rephrase selected text, which partially overlaps with QuillBot’s paraphrasing function. However, GrammarlyGO is designed as an on-demand writing improvement tool, not a systematic text transformation engine. For users whose primary need is paraphrasing existing content, QuillBot is the purpose-built tool and the correct choice.

Plagiarism Detection: Different Databases, Same Premium Requirement

Both Grammarly and QuillBot offer plagiarism detection — but only on paid plans, and they use different databases to check against.

Grammarly’s plagiarism checker checks submitted text against approximately 16 billion web pages — one of the largest databases available in any consumer writing tool. It identifies matching content and provides source links so you can verify the match. It is effective at identifying web-based plagiarism and content that appears elsewhere online.

QuillBot’s plagiarism checker uses the ProQuest database — a major academic database covering peer-reviewed journals, dissertations, and academic publications. For students writing research papers, ProQuest coverage is more relevant than web-only checking, because academic plagiarism concerns are primarily about unattributed use of academic sources, not web content.

The honest answer to the question many students ask — whether Turnitin can detect content rewritten by QuillBot or edited by Grammarly: Turnitin uses AI detection alongside its plagiarism database. Content rewritten by QuillBot may or may not flag in Turnitin’s AI detection depending on how extensively it was rewritten and which mode was used. Grammarly edits, which improve but do not rewrite content, are significantly less likely to trigger AI detection. Neither tool guarantees undetectability in Turnitin — and academic integrity policies at most institutions prohibit AI-assisted rewriting regardless of detection risk.

Integrations and Workflow: Grammarly Works Everywhere

Grammarly’s integration capability is one of its most significant practical advantages. The browser extension works across Chrome, Firefox, Safari, and Edge — meaning Grammarly actively monitors and suggests improvements in Gmail, LinkedIn, Outlook.com, Slack, Twitter, Facebook, and any other text field in a browser. The Microsoft Word add-in provides a full Grammarly editing sidebar within Word. The Google Docs integration works natively. The desktop app handles any application on Mac and Windows.

QuillBot operates primarily as a web application. You visit quillbot.com, paste your text, paraphrase it, and copy the result back to wherever you are working. There is no native Microsoft Word integration, no browser extension that works across your workflow, and no real-time assistance in Google Docs or Gmail. For users who need their writing tool to be present wherever they write, QuillBot requires a deliberate context switch — open the tab, paste, rewrite, copy back — that Grammarly never requires.

For a student or professional who spends most of their writing time in Microsoft Word or Google Docs, Grammarly’s native integration is a practical time-saver that adds up to meaningful efficiency over days and weeks of use. QuillBot’s workflow is fine for occasional paraphrasing tasks but becomes friction-inducing as a daily writing companion.

Grammarly vs QuillBot: Who Should Choose Which

Choose Grammarly if:

You write original content regularly — emails, reports, essays, articles — and want real-time grammar and style assistance as you write
You work primarily in Microsoft Word, Google Docs, Gmail, or Outlook and want your writing tool integrated into those environments
English is your second language and you need constant, contextual correction across all your writing — not just when you remember to check
You are a professional whose writing quality directly affects how others perceive your competence
You need plagiarism checking against a large web database for content originality verification
You want AI writing assistance (GrammarlyGO) for generating and improving text within your existing workflow

Choose QuillBot if:

You regularly need to rephrase, rewrite, or restructure existing text — research sources, drafts, or previously written content
You are a student who needs to paraphrase academic sources for essays and research papers
You need to summarise long documents or articles into key points quickly
You need citation generation in APA, MLA, Chicago, or Harvard format
You need to translate content into another language as part of your workflow
Budget is a primary concern — QuillBot Premium at ~$50/year is the most affordable capable writing tool in this comparison
You need academic-register rewriting for university-level writing

Use Both if:

You write original research or academic content (Grammarly for editing, QuillBot for paraphrasing sources)
You produce content at volume and need both real-time error correction and paraphrasing capability

Combined cost (~$194/year for both Premium plans on annual billing) fits your budget

Frequently Asked Questions

Is Grammarly better than QuillBot?

For grammar checking, style improvement, and real-time writing assistance integrated into your workflow, Grammarly is better. For paraphrasing, text rewriting, summarising, and citation generation, QuillBot is better. Neither is universally superior — they serve different primary functions. Grammarly is the correct choice for users who write original content and want it improved. QuillBot is the correct choice for users who need to transform or restructure existing text.

Can Turnitin see if I used Grammarly?

Grammarly edits your writing by suggesting improvements to your original text — it does not rewrite your content. Since the underlying ideas and structure remain yours, Grammarly-edited content is unlikely to trigger Turnitin’s plagiarism detection. Turnitin’s AI detection systems may flag some AI-generated content, but Grammarly’s grammar and style suggestions on human-written text are generally not detectable. That said, academic integrity policies at most institutions require that submitted work be your own — check your institution’s specific guidelines on AI writing tools before using either Grammarly or QuillBot for academic submissions.

Is QuillBot 100% accurate?

No. QuillBot’s paraphrasing is sophisticated but not perfect. On the Standard mode particularly, QuillBot sometimes produces paraphrases that subtly change the meaning of the original text by selecting synonyms that are contextually incorrect. The Fluency mode is generally more reliable for meaning preservation. The Academic mode is the most appropriate for research writing. QuillBot’s grammar checker is less accurate than Grammarly’s for catching complex grammatical errors. No AI writing tool should be used without human review of its output.

What is better than QuillBot for paraphrasing?

For general paraphrasing, QuillBot remains one of the strongest tools available at its price point. Alternatives worth considering: Wordtune offers strong paraphrasing with tone control; Jasper AI provides more sophisticated AI rewriting for longer content at a higher price; GrammarlyGO on the Grammarly Premium plan includes a rewrite function that overlaps with basic paraphrasing needs. For academic paraphrasing specifically, QuillBot’s Academic mode is purpose-built and difficult to beat at $50/year.

Which AI is best for grammar checking?

Grammarly is the most comprehensive grammar checking tool available for general use. It consistently outperforms competitors in independent accuracy tests, provides contextual explanations for every suggestion, and integrates into more applications than any alternative. For advanced users who want deep technical grammar analysis, ProWritingAid is a strong alternative with more detailed reporting. QuillBot’s grammar checker is basic by comparison and is not recommended as a primary grammar tool.

Can I use Grammarly and QuillBot together?

Yes — and many professional writers and students do. A common workflow: draft original content in your preferred application with Grammarly active for real-time error correction, then use QuillBot to paraphrase specific sections that feel repetitive or to restructure passages that are not working. The two tools complement rather than duplicate each other when used this way. Combined Premium cost on annual billing is approximately $194/year ($144 Grammarly + $50 QuillBot).

Is QuillBot free to use?

Yes. QuillBot offers a permanently free plan that includes paraphrasing up to 125 words per request, 3 paraphrase modes (Standard, Fluency, Simple), the summariser tool with no word limit, the citation generator for all major academic formats, and basic translation. The free plan has no time limit. Upgrading to QuillBot Premium ($4.17/month on annual billing, $9.99/month on monthly billing) unlocks unlimited paraphrase length, 5 additional paraphrase modes, plagiarism detection, and faster processing.

Is Grammarly worth the price compared to QuillBot?

For users who write professionally or academically and want their writing tool active everywhere they type, Grammarly Premium at $144/year is worth the cost — the integration into Microsoft Word, Google Docs, and Gmail alone provides daily value that QuillBot’s web interface cannot replicate. For users whose primary need is paraphrasing and text transformation rather than real-time writing assistance, QuillBot Premium at $50/year is the better value. The question is not which costs less — it is which tool you will use more often for the tasks you actually perform.

Does QuillBot work with Microsoft Word?

QuillBot does not have a native Microsoft Word integration or add-in. To use QuillBot with Word, you need to copy text from your Word document, paste it into the QuillBot web interface at quillbot.com, paraphrase it, and copy the result back to Word. This manual workflow works but is less efficient than Grammarly’s native Word integration, which provides a full editing sidebar directly within Word. For users who work primarily in Microsoft Word, Grammarly’s native integration is a significant practical advantage.

Which is better for students — Grammarly or QuillBot?

For students, the correct answer depends on the primary task. For essay writing, proofreading, and improving the clarity of original academic writing: Grammarly is the stronger tool. For paraphrasing research sources, summarising academic papers, and generating citations in the correct format: QuillBot is purpose-built for these tasks. Students who both write original essays and need to work with research sources benefit from using both. If only one is affordable, consider the task you spend most time on: if you write more original content, choose Grammarly; if you spend more time processing and incorporating research sources, choose QuillBot.

Related Guides on Digital Tool Zone

Grammarly Review 2026

Grammarly vs ProWritingAid 2026

Jasper AI Review 2026

AI Writing Tools Hub: All Reviews and

How We Researched This Comparison

This grammarly vs quillbot comparison is based on:

Pricing verification at grammarly.com/plans and quillbot.com/pricing, cross-referenced with multiple independent sources as of September 2026
Feature documentation reviewed against official Grammarly and QuillBot product pages, feature lists, and recent changelog entries
Free plan capability testing — both tools were evaluated on their free plans to verify what each actually allows before any payment is required
User review analysis from G2, Trustpilot, Reddit (r/grammar, r/writing, r/academia), and Capterra to identify consistent real-world usage patterns and reported limitations
Grammar accuracy comparison using independent test documents submitted to both tools’ grammar checkers to evaluate correction quality

We have a published Grammarly Review on Digital Tool Zone. That existing editorial coverage does not affect this comparison — the QuillBot strengths (paraphrasing, summarising, citation generation, lower price) are stated clearly where QuillBot genuinely outperforms Grammarly.

Prices in this article are listed in USD and were sourced from publicly available information on each company’s official website and reputable third-party review platforms at the time of publication. Software pricing changes frequently and promotional discounts are offered regularly. Visit grammarly.com/plans and quillbot.com/pricing to confirm current rates in your region before signing up.

Abdul Rasheed

Founder & Lead Editor — Digital Tool Zone

Written by Abdul Rasheed | Last Updated: september 2026

Abdul holds a BS in Information Technology and founded Digital Tool Zone to provide honest, independently researched digital tool reviews for bloggers, freelancers, and small business owners. Every recommendation on this site is held to one standard: would this have helped me when I needed it?

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