Grammarly vs QuillBot for Students: Which Is Better?

Grammarly vs QuillBot for Students: Quick Verdict

Grammarly and QuillBot now overlap far more than they used to.

Both can correct grammar, rewrite sentences, paraphrase, detect AI-generated text, help with citations, and support academic writing. Both have expanded far beyond the simple tools they were originally known for.

But they still approach writing differently.

Grammarly is the better writing companion. It stays with you while you draft in Word, Google Docs, browsers, email, and other applications, then provides corrections, rewrites, tone feedback, plagiarism checking, citations, and newer AI agents such as AI Grader, Reader Reactions, Citation Finder, and Proofreader.

QuillBot is the better writing toolbox. Its strength is deliberately transforming text: paraphrasing, summarizing, changing modes, checking grammar, generating citations, detecting plagiarism, translating, humanizing, and working through its growing collection of specialized tools. Premium currently supports unlimited paraphrasing, nine predefined modes, a 6,000-word Summarizer limit, unlimited AI Detector use, and 25,000 plagiarism-checking words per month.

For students, the decision looks like this:

Overall winner for academic writing: Grammarly

Best value and paraphrasing choice: QuillBot

I would not recommend paying for both immediately.

For most students, one of them should solve the main writing problem. The trick is identifying whether that problem happens while you are writing or after you already have text that needs transforming.

For a wider student AI stack beyond writing alone, see our Best AI Tools for Students guide.

The Difference Becomes Clear Once You Start Writing an Essay

Imagine you have a 2,000-word sociology paper due Friday.

You have already done the research and written the first draft.

The introduction feels repetitive. Several paragraphs are too long. Your tone shifts between informal and overly academic. Two quotations still need citations, and you are not sure whether your conclusion actually answers the assignment question.

This is where Grammarly feels natural.

It follows the draft, points out problems as they appear, can suggest full-sentence rewrites, evaluate tone, check originality, and — through its newer agents — review the work against a rubric or help identify claims that need sources. Grammarly’s AI Grader can use an uploaded rubric, assignment information, and the draft to provide document- and paragraph-level feedback plus an estimated grade.

Now imagine a different problem.

You have a dense paragraph from your own draft that you understand perfectly, but it sounds terrible:

The increased implementation of remote forms of professional collaboration creates a multiplicity of challenges pertaining to communication efficiency and the maintenance of organizational cohesion.

You want three clearer alternatives.

That is QuillBot territory.

Paste the paragraph into the Paraphraser, switch between modes, adjust the amount of synonym replacement, compare alternatives, and choose the version that still expresses what you intended. Premium currently provides unlimited paraphrasing, multiple predefined and custom modes, Compare Modes, history, tone insights, and paraphrasing across 23 languages.

Grammarly improves writing in context.

QuillBot is especially good at transforming a selected piece of writing on demand.

That distinction is more useful than simply comparing checkboxes.

Grammar and Proofreading: Grammarly Still Has the Advantage

Grammarly’s original strength remains one of its strongest reasons to use it.

The Free plan provides correctness assistance and tone information, while Grammarly Pro adds full-sentence rewriting, tone adjustment, advanced writing support, and a larger generative-AI allowance. The current web-based Pro plan includes 2,000 generative AI prompts per month compared with 100 on Free.

The practical advantage is that the feedback appears where you are already writing.

Grammarly supports environments including Google Docs, Microsoft Word, Gmail, Outlook, browsers, and numerous other applications. Its student pages also highlight support in academic environments such as Canvas and Overleaf.

That matters because proofreading is usually not a separate activity.

A student writing an essay in Word does not necessarily want to:

1. Copy the paragraph.
2. Open another website.
3. Paste it.
4. Correct it.
5. Copy it back.
6. Check whether formatting survived.

The best writing assistant often becomes the one that interrupts the writing process least.

Grammarly is very good at disappearing into that process.

QuillBot’s Grammar Checker Has Improved

QuillBot should not be dismissed as merely a paraphraser anymore.

Its Premium plan now includes advanced writing suggestions, tone insights, grammar correction across multiple languages, and dedicated desktop/browser integrations. QuillBot also provides applications or extensions for Windows, macOS, Chrome, Edge, Safari, iOS, Android, and Microsoft Word.

Its 2026 Microsoft Word add-in lets users run the Paraphraser and Grammar Checker from a sidebar inside Word on Windows, Mac, and Word Online.

So the gap has narrowed.

I would still choose Grammarly for continuous proofreading because that is closer to the core design of the product.

QuillBot becomes more compelling when grammar checking is only one part of a broader rewrite-and-paraphrase workflow.

Paraphrasing: QuillBot Wins Easily

This is the section where the comparison becomes much less balanced.

QuillBot built its reputation around paraphrasing, and the current product still gives users much more direct control over that process.

Free users can paraphrase up to 125 words at a time using Standard and Fluency modes. Premium removes the word limit and currently offers nine predefined modes, custom modes, Compare Modes, paraphrase history, synonym controls, tone insights, and multilingual paraphrasing.

That is useful because “rewrite this sentence” can mean several things.

You might want it:

• Shorter
• More formal
• Simpler
• More academic
• More fluent
• Less repetitive
• More natural
• More concise

QuillBot lets you deliberately explore those alternatives.

Grammarly also now has a Paraphraser agent and full-sentence rewrite tools. Its current AI-agent system can rework text according to audience, tone, and style.

But for a student whose recurring workflow is:

“I know what I’m trying to say, but this sentence needs another formulation,”

QuillBot is still the product I would choose.

The Important Academic Integrity Rule

Paraphrasing somebody else’s sentence does not magically turn the underlying idea into yours.

QuillBot’s own documentation explicitly states that paraphrasing an external source still requires citation. Using its Paraphraser on someone else’s material without attribution may still constitute plagiarism. QuillBot also says the tool is not designed to bypass plagiarism systems such as Turnitin.

This is worth spelling out because students sometimes use paraphrasing tools backwards.

Correct workflow:

Read source → understand source → write your interpretation → cite source → optionally improve your wording.

Risky workflow:

Copy source → run through paraphraser → submit without attribution.

The second process has not solved the academic-integrity problem.

It has only changed the wording.

Essay Feedback: Grammarly Has Become Much More Interesting

This is where Grammarly’s recent evolution changes the comparison.

The old version of this article would have said:

Grammarly fixes grammar; QuillBot paraphrases.

That is no longer enough.

Grammarly now offers specialized writing agents designed around stages of the writing process, including AI Grader, Reader Reactions, Citation Finder, Proofreader, AI Detector, Plagiarism Checker, Paraphraser, and Humanizer.

For students, AI Grader is particularly interesting.

You can provide a rubric or assignment instructions and receive feedback aligned with those requirements. Grammarly explicitly says the grade is an estimate rather than a prediction of exactly what the professor will award. Free users currently receive one AI Grader document scan per day with limited recommendations, while paid users get the full agent.

That creates a useful workflow:

Here is my essay and the professor’s rubric. Do not rewrite the paper. Tell me which rubric criteria are currently weakest.

Then you fix them.

This is much more educationally useful than asking an AI system:

Make this essay an A.

Reader Reactions Is Also Surprisingly Useful

Reader Reactions attempts to show how a selected audience may interpret your writing: what they are likely to take away, what could confuse them, and where information may feel incomplete. Free users currently receive up to five reactions per day, while paid users can access it without that free limit.

For an academic essay, you could define the target reader as a professor.

For a presentation, it could be classmates.

For a cover letter, it could be a recruiter.

This is not proof that the actual professor or recruiter will react the same way.

But it is a more sophisticated form of feedback than another grammar score.

Summarizing: QuillBot Is Simpler and More Purpose-Built

QuillBot includes a dedicated Summarizer.

Free accounts currently support source text of up to 1,200 words, while Premium raises the limit to 6,000 words and adds custom summaries.

This makes it convenient when you have a long section of your own notes or a piece of source material and want a shorter version.

The danger is obvious.

If you summarize a chapter you never read, you may save time and lose the part where you actually learn it.

A better student workflow is:

Read the chapter → write what you think the main argument was → use the Summarizer → compare what you missed.

That turns AI into feedback rather than substitution.

For students dealing with much larger documents or multiple PDFs, a dedicated source-based tool may be a better fit than either Grammarly or QuillBot. Our Best AI Tools to Summarize PDFs guide covers that use case separately.

Citations: QuillBot Is Better for Building a Bibliography, Grammarly Is Better for Finding Gaps in a Draft

Both products now have serious citation functionality, but they approach the task differently.

QuillBot Citation Generator

QuillBot’s Citation Generator is free and currently supports more than 1,000 citation styles. It can generate and organize citations for sources such as websites, books, journal articles, reports, videos, and other materials, and it supports importing information through URLs, titles, DOI, ISBN, keywords, or PDF uploads.

APA, MLA, Chicago, and Harvard are among the supported styles. QuillBot says bibliographies can be created, edited, saved, copied, and exported without requiring Premium.

That makes it an excellent practical student utility even if you never subscribe.

You can collect the sources for a paper as you research rather than trying to reconstruct the bibliography at 1:30 a.m. before submission.

Grammarly Citation Finder

Grammarly’s newer Citation Finder is more interesting once the essay already exists.

It scans the writing for factual claims, identifies areas that may need supporting evidence, can surface potential web sources, and formats selected citations. The current agent is available to Grammarly Pro and Plus subscribers, plus supported organizational/Education users.

That answers a slightly different question:

QuillBot:

“How do I correctly cite this source?”

Grammarly Citation Finder:

“Which claims in my paper still need evidence?”

I like both workflows.

For building references from scratch, QuillBot wins.

For reviewing an existing research-heavy draft for unsupported claims, Grammarly’s Citation Finder is more interesting.

And whichever tool you use, open the actual source before citing it.

A perfectly formatted citation to an irrelevant paper is still a bad citation.

Plagiarism Checking: Both Require a Paid Plan for the Full Experience

QuillBot’s Plagiarism Checker is part of Premium and currently allows up to 25,000 words per month. It scans writing for similarities with external material and provides reports intended to help identify potentially uncited source use.

Grammarly also provides plagiarism checking on paid plans. Its current Plagiarism Checker agent is available to Pro and Plus users in Grammarly’s writing environment and scans against academic, online, and published sources to identify similarities and potential citation problems.

I would not choose between the products on this feature alone.

The larger question is where you want the plagiarism check to sit in your workflow.

With Grammarly, it is naturally part of a broader document review.

With QuillBot, it sits beside paraphrasing, citations, AI detection, summarization, and the other dedicated writing utilities.

One caution applies to both:

A plagiarism score is a diagnostic.

It is not permission to submit the paper.

Always inspect the flagged passages yourself.

AI Detection: Do Not Treat Either Score Like a Lie Detector

Both companies now provide AI-detection functionality.

QuillBot gives Free users limited AI Detector access; its current support documentation lists up to 1,200 words and ten scans per day for free accounts, while Premium removes those limits.

Grammarly’s integrated AI Detector is a paid feature in its main writing environment, although Grammarly also provides broader student-facing AI-authenticity tools and Authorship tracking.

Neither detector should be treated as objective proof.

QuillBot itself says no AI detector can achieve 100% accuracy and warns that formulaic human writing — including academic writing — can produce false positives.

Grammarly makes a similar point. Its AI Detector documentation says results are probabilistic, false positives can occur, and a score from Grammarly may differ from tools such as Turnitin, GPTZero, or Copyleaks.

There is an especially important Grammarly detail for students.

Grammarly warns that text rewritten using its own generative agents may itself be flagged as likely AI-generated because those rewrites come from a language model. If inappropriate AI use is a concern, Grammarly recommends using the agents for feedback and manually incorporating the suggestions instead of relying on automated rewrites.

That may be one of the most useful pieces of advice in this entire comparison.

Do not spend an hour trying to “beat” an AI detector.

Write work you understand, follow your institution’s policy, keep your sources, and be transparent about material AI assistance where required.

Grammarly Authorship Solves a Different Integrity Problem

One feature QuillBot does not directly match is Grammarly Authorship.

Authorship can track how text enters a document and distinguish categories such as text typed by the user, material copied from another source, and AI-assisted content. Basic tracking and unlimited reports are available to Free users in supported environments, while paid tiers provide more detailed attribution and AI/plagiarism information.

It currently works in supported workflows including Google Docs and Microsoft Word, while Grammarly has also integrated Authorship into educational environments such as Canvas for participating institutions.

This matters because AI detection asks:

“Does this text look AI-generated?”

Authorship tries to answer:

“How was this document actually created?”

Those are very different questions.

For a student concerned about demonstrating that a paper was genuinely developed through their own writing process, the second can be far more meaningful.

Free Plans: Which One Gives Students More?

The answer depends on what you want.

Grammarly Free

Grammarly’s current Free plan includes:

• Grammar and spelling assistance
• Tone information
• 100 generative AI prompts per month
• Access to selected AI-agent functionality with free limits
• Basic Authorship tracking and reports
• Cross-app writing support

For ordinary proofreading, that may be all a student needs.

There is no time limit on the Free plan.

QuillBot Free

QuillBot Free currently includes:

• Paraphrasing up to 125 words at once
• Standard and Fluency modes
• Basic grammar correction
• Summaries up to 1,200 words
• Limited AI Detector use
• Limited AI Humanizer use
• AI Chat with daily limits
• Browser and app integrations

Its Citation Generator is also available separately for free and supports more than 1,000 citation styles.

So which Free plan is better?

For writing an essay from beginning to end, Grammarly Free.

For occasionally rewriting, summarizing, or citing something, QuillBot Free.

There is also no reason you cannot use both free plans.

That is actually what I would recommend before subscribing to either.

Grammarly vs QuillBot Pricing for Students

This is where QuillBot becomes much more competitive.

Grammarly Pro Pricing

Grammarly’s current standard web pricing is:

Grammarly also supports regional pricing in some markets, so checkout currency and local tax can differ.

The annual subscription is dramatically more sensible than paying $30 month after month if you intend to use Pro throughout the academic year.

One source of confusion is that Grammarly Premium still exists for App Store and Google Play purchases, while Grammarly’s website has moved individual web customers toward Pro. Current Premium includes the core paid writing features and 1,000 monthly generative-AI prompts, while Pro provides 2,000.

Grammarly Student Discount

Eligible students can currently verify through SheerID and receive up to 50% off Grammarly Pro, equivalent to savings of up to $72 on the standard annual price.

But read the renewal condition.

The promotion applies for one subscription period only. Grammarly says the subscription then renews at the standard rate. The offer also cannot be combined with other promotions and does not apply to purchases made through the App Store or Google Play.

So this is a strong first-year discount.

It is not a permanent student price.

Before paying, also check whether your university already provides Grammarly for Education. Institutions can license Grammarly directly for students and faculty.

QuillBot Pricing

QuillBot Premium’s standard annual public price is currently $8.33 per month when billed annually. The standard Premium tier provides unlimited paraphrasing and additional writing, summarizing, detection, plagiarism, and AI features.

QuillBot also offers monthly and quarterly billing, with the exact amount subject to region and checkout pricing.

QuillBot Student Discount

QuillBot currently provides verified students:

• 10% off monthly Premium
• 15% off quarterly Premium
• 25% off annual Premium

The current student checkout page displays:

And unlike Grammarly’s one-period discount, QuillBot says the student discount continues on renewal for as long as the account remains verified as a student, although periodic re-verification may be required.

That is a major advantage.

Which Gives Better Student Value?

For the first discounted year, the gap can be surprisingly small if a student receives Grammarly’s maximum 50% promotion.

But the long-term economics favor QuillBot.

Its normal annual price is already lower than Grammarly Pro’s standard annual subscription, and the verified student annual discount currently drops the effective price to $6.25 per month.

That does not automatically make QuillBot better.

It means Grammarly needs to solve a more valuable problem for you.

If you write constantly in English and rely on real-time corrections across Word, Docs, email, Canvas, browsers, and everyday communication, paying more for Grammarly can make sense.

If you mainly need paraphrasing, summaries, citations, rewriting, grammar checking, and plagiarism tools for assignments, QuillBot is difficult to beat on student pricing.

Refunds and Trials: Read This Before Paying

Neither product should be treated as automatically refundable just because you forgot to cancel.

Grammarly says individual subscriptions can be cancelled at any time, but its general policy is that refunds are provided only where required by law. Cancelling stops the next renewal while paid access remains active until the end of the current subscription period. Grammarly may periodically offer free trials, but a trial is not guaranteed to be available to every user at all times.

QuillBot currently has a documentation inconsistency worth knowing about.

Its student-discount page still advertises a 3-day money-back guarantee, while its Help Center, updated in March 2026, says refunds are issued only when required by law. For consumers in the EEA and UK, QuillBot explicitly notes a 14-day statutory withdrawal right.

Because those two official statements currently conflict, I would not purchase QuillBot assuming a universal three-day refund.

Treat the terms shown during your checkout — plus any statutory consumer protections where you live — as the source of truth.

QuillBot does offer one useful subscription feature for students: Premium can be paused during periods when you do not need it, such as a summer break.

Which One Is Better for an International Student?

I would lean toward Grammarly when the main challenge is producing polished academic English consistently.

Grammarly’s support lives alongside the writing process and its multilingual suggestions now extend across supported desktop, browser, mobile, and Grammarly Docs environments. Paid users receive more extensive multilingual writing assistance.

That is useful when the student already understands the subject but spends too much attention on:

• Article usage
• Prepositions
• Sentence structure
• Tone
• Awkward phrasing
• Word choice
• Clarity

QuillBot is also strongly multilingual. Its current Premium comparison lists paraphrasing across 23 languages and translation into more than 40 languages.

So if the problem is rewriting and translation, QuillBot becomes more attractive.

If the problem is ongoing writing quality, Grammarly feels more natural.

Which One Is Better for Research Papers?

For a full research paper, I would choose Grammarly.

Not because it is a research database.

It is not.

The reason is that the product now covers more of the final-writing workflow: proofreading, structure, reader feedback, rubric-based evaluation, Citation Finder, plagiarism checks, AI detection, and Authorship.

QuillBot would be my supplementary choice when I need:

• A difficult paragraph paraphrased
• A long section summarized
• A bibliography generated
• An alternative sentence structure
• A plagiarism scan
• A translation

For research itself, I would use neither as the primary evidence source.

A source-grounded research assistant, academic database, university library, or general AI tool with verifiable sources is more appropriate.

Which One Is Better for Weekly Essays?

This depends on where you lose time.

If your typical experience is:

“I write quickly, but the final draft has grammar problems and awkward sentences.”

Choose Grammarly.

If your experience is:

“I know what I want to say, but I constantly struggle to phrase it clearly or differently.”

Choose QuillBot.

If you spend hours on both problems, test both Free plans before paying.

You may discover that Grammarly Free already handles enough proofreading and that QuillBot Premium solves the more expensive problem — or the reverse.

The Workflow I Would Recommend Instead of Letting AI Write the Essay

Start with your own thinking.

1. Build the Argument Yourself

Write the thesis, main arguments, evidence, and structure before asking either tool to rewrite anything.

If you cannot explain the argument without AI, the problem is not grammar.

2. Write the Rough Draft

Do not try to make every sentence perfect while drafting.

Get the ideas onto the page.

3. Use Grammarly for Structural and Language Problems

Review:

• Grammar
• Clarity
• Repetition
• Tone
• Sentence structure
• Rubric alignment

If you have access to AI Grader, use it as feedback rather than as a rewrite button.

4. Use QuillBot Selectively

Take the two or three sentences that genuinely sound wrong and compare alternative formulations.

Do not feed the entire paper through the Paraphraser merely to make it “different.”

5. Verify Every Citation

Use QuillBot’s Citation Generator or Grammarly’s citation features to save formatting time, but open the source and verify the details yourself. QuillBot itself recommends checking citation formatting against official style guidance when precision is critical.

6. Check Originality

Run an originality check if your course requires it or if you incorporated many external sources.

Then inspect the highlighted passages manually.

7. Read the Essay Without Either Tool

This step matters.

Would you naturally use these words?

Can you explain every sentence?

Does the conclusion actually answer the question?

Are you comfortable defending every claim during a seminar?

If not, the document is not finished.

Grammarly vs QuillBot for Students: Which Should You Pay For?

Choose Grammarly If…

You want one writing assistant following you across the places you already write.

It is the stronger choice for:

• Grammar and proofreading
• Continuous writing assistance
• Essay-level feedback
• Rubric analysis
• Reader-focused feedback
• Academic-integrity tracking
• Working across multiple apps
• Polishing English as a second language

Choose QuillBot If…

You deliberately open a tool when the text needs transforming.

It is the stronger choice for:

• Paraphrasing
• Rewriting
• Summarization
• Citation generation
• Lower student pricing
• Multilingual rewriting
• Frequent alternative phrasing
• Students who want a toolbox rather than an always-on editor

Use Both Free Plans If…

You are not sure.

That is the option I would recommend first.

Grammarly Free can handle everyday proofreading while QuillBot Free gives you basic paraphrasing, summarizing, AI detection, and citations.

Only upgrade once the limitation becomes obvious.

Final Verdict

For most students who write essays regularly, Grammarly is the better overall writing assistant.

Its advantage is no longer simply grammar correction. The current product follows the whole writing process more closely, with sentence rewrites, tone support, AI Grader, Reader Reactions, Citation Finder, plagiarism checking, AI detection, and Authorship alongside its broad app integrations.

That makes it particularly useful when the challenge is:

“I have written the paper. How do I make it genuinely better before I submit it?”

QuillBot is the stronger choice for paraphrasing and student value.

Its dedicated Paraphraser remains more flexible, Premium adds unlimited transformations and multiple writing modes, the Summarizer is useful, the Citation Generator is excellent even without paying, and Premium bundles plagiarism and AI-detection tools.

And then there is the price.

QuillBot’s current verified student annual plan is $74.96 per year, or $6.25 per month equivalent, and the discount continues while eligibility is maintained. Grammarly’s discount can be larger initially — up to 50% — but lasts only for one subscription period before standard pricing returns.

So my recommendation is:

Choose Grammarly if your priority is becoming a stronger writer across the entire drafting process.

Choose QuillBot if your priority is paraphrasing, rewriting, citations, and getting the most tools for the lowest student price.

And if your budget is zero?

Use Grammarly Free + QuillBot Free.

That combination already covers proofreading, basic paraphrasing, summaries, citation generation, and limited AI tools without another subscription.

Students building a broader academic setup can pair those tools with the options in our Best AI Tools for Students and Best Productivity Apps for Students guides.

The goal is not to make AI write more of your assignments.

It is to spend less time fighting with wording so you can spend more time having something worth saying.

Frequently Asked Questions

Is Grammarly or QuillBot Better for Students?

Grammarly is better for continuous proofreading, grammar correction, essay feedback, rubric analysis, tone, and writing across multiple applications.

QuillBot is better for paraphrasing, summarization, citations, rewriting, and students seeking a cheaper Premium subscription.

Is QuillBot Free for Students?

QuillBot has a Free plan available to everyone.

It currently includes paraphrasing up to 125 words using two modes, summaries up to 1,200 words, basic grammar correction, limited AI Detector use, and other restricted tools.

Eligible students can also receive discounts on QuillBot Premium.

Does QuillBot Have a Student Discount?

Yes. Verified students currently receive 10% off monthly Premium, 15% off quarterly Premium, and 25% off the annual subscription. The annual student plan is currently displayed at $74.96 per year, equivalent to $6.25 per month.

QuillBot says the discounted renewal continues while you remain a verified student, subject to periodic re-verification.

Does Grammarly Have a Student Discount?

Yes. Eligible students can currently verify through SheerID for an offer of up to 50% off Grammarly Pro.

The discount applies for one subscription period only. Afterward, the subscription is set to renew at the normal rate.

Is Grammarly Free Enough for College?

For many students, yes. Grammarly Free includes core correctness assistance, tone feedback, 100 monthly AI prompts, and access to selected free functionality.

Paid features become more valuable when you need full-sentence rewrites, advanced feedback, plagiarism checking, more AI usage, and the full academic-agent workflow.

Is QuillBot Better Than Grammarly for Paraphrasing?

Yes. QuillBot’s current Premium Paraphraser supports unlimited text, nine predefined modes, custom modes, Compare Modes, history, multilingual paraphrasing, synonym adjustment, and tone insights.

Grammarly can paraphrase and rewrite too, but QuillBot provides more dedicated control over the transformation process.

Which Is Better for Grammar Checking?

Grammarly. Its product is built around continuous writing feedback across applications, while QuillBot’s grammar functionality sits inside a broader collection of rewriting tools.

QuillBot Premium nevertheless includes advanced writing recommendations, tone insights, and multilingual grammar correction.

Which Is Better for Citations?

QuillBot is better for creating and managing citations from known sources. Its Citation Generator is free and supports more than 1,000 styles.

Grammarly’s paid Citation Finder is more useful for reviewing an existing draft because it can identify claims that need support and suggest potential sources.

Does QuillBot Check for Plagiarism?

Yes, on Premium.

The current Premium plan includes plagiarism checking for up to 25,000 words per month.

Does Grammarly Check for Plagiarism?

Yes. Grammarly’s Plagiarism Checker is available on supported paid plans and can scan documents against online, academic, and published sources.

Can QuillBot Help Me Avoid Turnitin?

QuillBot explicitly says its Paraphraser is not intended to bypass plagiarism-detection systems and that paraphrasing external material still requires proper citation.

Use it to improve your own writing, not to disguise copied material.

Are Grammarly and QuillBot AI Detectors Accurate?

Neither should be treated as definitive proof.

QuillBot states that no AI detector is 100% accurate and that academic or formulaic human writing can generate false positives.

Grammarly similarly explains that its scores are probabilistic and can differ from other AI detectors.

Can Grammarly’s Own AI Rewrites Be Flagged as AI?

Yes. Grammarly specifically warns that content rewritten by its generative agents can be flagged by its AI Detector because those rewrites are produced by a language model.

Students concerned about AI-use rules should use the agents for feedback and make revisions themselves.

Is It Worth Paying for Both Grammarly and QuillBot?

Probably not for most students. Use the two Free plans first.

Pay for Grammarly when continuous editing and essay feedback are the bottleneck.

Pay for QuillBot when paraphrasing, summarizing, plagiarism checks, and rewriting limits are the bottleneck.

If you need wider AI support for studying, research, PDFs, and course material rather than just writing, see our Best AI Tools for Students guide.