QuillBot Review 2026: Pricing, Features, and AI Detector

You’ve rewritten a paragraph four times, but it still doesn’t sound right. Maybe you pasted a chapter of your thesis into your university’s AI checker, and now you’re worried it might flag your work, even though it’s all yours. Or perhaps you’re a blogger who’s written twelve articles this month, and you’re no longer spotting your own typos.

That’s often when someone searches for a “QuillBot review” on Google. It’s not just curiosity about AI writing tools; it’s because you have something due and need it to be better, clearer, or clearly written by a human before you submit it.

Since 2017, QuillBot has been the go-to solution for these problems. By 2026, it’s much more than just a paraphrasing tool. Now, it includes a grammar checker, plagiarism scanner, AI detector, AI humanizer, citation generator, translator, and summarizer, all bundled under one account. The main goal is simple: turn writing that isn’t quite ready into something you can publish.

If you want to skip ahead and try it while you read, QuillBot’s free plan only takes two minutes to sign up and doesn’t ask for a credit card. You can test the features described below right away.

The rest of this review walks through what actually happens when you run real writing through QuillBot, where it earns its subscription price and where it doesn’t, and how it holds up against Grammarly, Wordtune, and ProWritingAid now that all four have updated their pricing and features in 2026.

The Problem QuillBot Is Actually Trying to Solve

Before getting into features, it’s worth being honest about who ends up here and why, because QuillBot serves a few genuinely different people with the same product.

Some users are students with a paper due soon who want clear sentences and correct citations. Others are non-native English speakers who understand the subject matter perfectly but second-guess every sentence structure. Many are content marketers or bloggers (many of SuccessPixel’s own readers fall here) who write so much that manual proofreading isn’t practical anymore.

These days, many writers worry less about perfect grammar and more about professors, editors, or clients using AI detectors to review their work. Sometimes these tools wrongly mark genuine human writing as AI-generated, causing false positives.

These four groups have different pain points, but they land on the same page because QuillBot has quietly built a tool for each of them in one subscription. This review covers whether QuillBot is a good deal for them and how well each tool works in practice.

Signing Up for QuillBot to Test What You Really Get With a Free Plan

Signing up takes under a minute, requires no credit card, and drops you straight into the Paraphraser with a blank text box on the left and a rewritten version on the right. That zero-friction first experience is part of why QuillBot has remained the default recommendation for so long. You don’t have to commit to anything before you find out whether the tool fits your writing style.

The free plan isn’t a stripped-down demo designed to frustrate you into upgrading in the first five minutes, but it is deliberately narrow. You get two paraphrasing modes (Standard and Fluency), a 125-word cap per paraphrase, basic grammar and punctuation correction, AI humanizing capped at 125 words across six uses a day, single-paragraph summaries up to 1,200 words, and limited access to the AI Detector.

That 125-word ceiling is what pushes people toward Premium, and it happens fast. Paste in a full paragraph from an essay or blog post, and you’ll hit the wall almost immediately. For a single sentence here and there, free is genuinely fine. For anything resembling a real writing workflow, it’s a taste, not a full-fledged tool.

QuillBot Paraphraser

The Paraphraser is still what QuillBot is best known for, and remains the main reason to choose it over most competitors. When you paste a sentence, it does more than just swap synonyms as older spinning tools did. It restructures clauses, reorders phrases, and adjusts tone depending on which QuillBot mode you pick.

Free users get access to Standard and Fluency modes. Upgrading to Premium unlocks the full set: Formal, Academic, Simple, Creative, Expand, and Shorten, plus unlimited custom modes you can build yourself.

There’s also a Synonym Slider that lets you control how aggressively the tool rewrites, from barely touched to heavily reworded. Clicking any word in the output shows a list of alternate synonyms if you want to fine-tune a single choice instead of accepting the whole rewrite.

In testing, the Formal and Academic modes handled technical vocabulary without mangling meaning, a failure mode older paraphrasing tools were notorious for. It still stumbles with genuinely nuanced or idiomatic phrasing. If you feed it a sentence with a cultural reference or quirky rhythm, it tends to smooth that personality into something more generic. That matters if you are paraphrasing creative writing rather than academic or business prose.

QuillBot Grammar Checker: Solid for a Fast Pass, But Not a Grammarly Replacement

QuillBot’s grammar checker handles basics like subject-verb agreement, misplaced commas, and confusing words such as “affect” and “effect.”

There’s a one-click “Fix Errors” button that quickly clears all flagged issues, saving time during your first edit.

It doesn’t do as well with deep tone or clarity suggestions across long, multi-paragraph documents, where Grammarly’s more mature engine still pulls ahead. Think of QuillBot’s grammar checker as a fast, competent pass rather than a full editorial review. For a quick clean-up before hitting publish, it’s more than adequate.

For a 5,000-word report you want workshopped sentence by sentence, it’s not the most thorough tool available.

QuillBot AI Detector and AI Humanizer

Here’s where this review needs to slow down: the AI Humanizer and AI Detector are the two features driving most search traffic around QuillBot right now, and they’re also the two most likely to be misunderstood.

QuillBot AI Detector Review

Every AI detector on the market oversells its own reliability to some degree, and it’s worth saying plainly that QuillBot does not. Its product page carries a disclaimer most vendors would rather bury in fine print: never rely on AI detection alone to make decisions that could affect someone’s career or academic standing. This is a more candid stance than many competing tools take, and independent testing shows why that caution matters.

Across a range of independent 2026 tests from different firms, QuillBot’s AI Detector accuracy on straightforward, unedited AI text has ranged from 76% to 100%. Performance drops meaningfully, in some tests down toward 60%, once the text is hybrid content where a human has substantially edited AI-generated output. This is exactly the kind of writing most real-world detection questions involve.

One useful detail is that the detector doesn’t give a flat yes-or-no answer. It classifies text into four categories: fully AI-generated, AI-generated then refined, human-written then AI-refined, or fully human. This is a more nuanced result than a single probability score, even if the underlying accuracy still has real limits.

The honest verdict: QuillBot’s AI Detector is a reasonable free first check on your writing before you submit or publish it. Don’t lean on it for an academic integrity accusation, a hiring decision, or any situation where a false positive affects someone else. If the stakes are that high, pair it with a dedicated AI detection tool rather than treating QuillBot’s result as final.

AI Humanizer: Useful as a Starting Point, Risky as an Ending Point

The AI Humanizer rewrites stiff, AI-sounding text to read more naturally. Free users get 125 words across six uses a day. Premium removes both limits entirely.

In testing, it worked reasonably well on short passages, smoothing out repetitive sentence structures and generic phrasing that make AI text easy to spot. The failure mode appears at scale: running a full article through it tends to flatten the original’s distinct voice into something acceptable but forgettable. Treat it as a rough first pass that still needs a human edit on top, not a finish line.

QuillBot AI Tools

QuillBot Plagiarism Checker

It scans submitted text against billions of web pages and academic sources and returns a similarity score with source-by-source breakdown. The catch is the cap: even on Premium, you’re limited to 20 pages a month (roughly 5,000 words per page), which is a real constraint if you’re checking full-length assignments or long-form articles on a regular basis rather than the occasional document.

QuillBot Citation Generator

Plagiarism isn’t just copying words; it also includes stealing ideas. Even when you rephrase, you must give credit if the idea isn’t yours.

While some use paraphrasing to steal someone else’s content, QuillBot is dedicated to protecting academic integrity. The company actively promotes honesty, responsibility, and proper citation whenever you paraphrase or use someone else’s work.

It combines an online plagiarism checker, a citation generator, and guides to help students avoid unintentional plagiarism. For a top-rated paraphrasing tool, this is commendable.

Copying someone else’s idea and giving it a fresh twist is as unethical as ripping them off and counts as plagiarism. You must properly cite everything that isn’t your own creation, even paraphrased writing.

Don’t worry!

The QuillBot Citation Generator allows you to create accurate citations for web pages, journal articles, books, images, videos, and reports/government documents.

The tool supports standard formats (APA, MLA, Chicago, and more) and automatically pulls metadata from a pasted URL, saving time for students and researchers who’d otherwise format citations by hand.

QuillBot Summarizer

QuillBot’s text summarizer makes it easy to get a quick, clear summary of any text in seconds.

Whether it’s an essay, article, research paper, or just a tricky paragraph, QuillBot’s AI does the heavy lifting. It quickly identifies the most important information using natural language processing (NLP), so you get the key points without losing context.

You can summarize the text using QuillBot in two ways:

Key Sentences provides a bulleted list of the critical points. You can even adjust the summary length slider to change the number of bullets you receive.

If you prefer everything in one place, choose Paragraph mode; QuillBot will condense the text into a single, easy-to-read paragraph. You can use the slider here too to make your summary as short or detailed as you like.

Best of all, QuillBot’s summarizer is totally free to use as much as you want. Free users can summarize up to 1,200 words at a time, while Premium members get a generous 6,000-word limit for each request.

QuillBot Translator

It supports over 30 languages and, unlike many similar tools, it is completely free, has no ads, and doesn’t require an account.

You can use AI to translate any text quickly and accurately without hidden costs or subscription fees. You can access QuillBot’s online translator directly in your web browser with nothing to download. It also works on mobile devices, so you can use it anywhere without any trouble.

Try QuillBot’s translator today and make multilingual communication easier than ever.

QuillBot AI Chat

QuillBot has also rolled out AI Chat and an AI Image Generator as part of the broader suite, positioned as brainstorming and drafting aids rather than the core product. They’re a reasonable bonus if you’re already paying for Premium, but they’re not differentiated enough from dedicated chat and image tools to justify subscribing on their own.

QuillBot’s AI Image Generator

The tool is worth a special mention here. It lets you create custom visuals from text prompts. You can make photorealistic images, illustrations, anime, watercolor, cinematic, 3D, and more. Choose from aspect ratios like 1:1, 4:3, 16:9, or 9:16, so it works well for blog posts, social media, presentations, and marketing content. Surprisingly, it’s quite fast and fine-tuned for customization.

You can use the tool for free and generate up to three images every 24 hours when logged in. Premium users get a higher monthly limit, and you can download all generated images in high resolution without a watermark.

It’s easy to use. Describe the image you want, pick a style and aspect ratio, and click Generate. If you’re not happy with the result, adjust your prompt and try again. This makes it a convenient way to create custom visuals without needing another AI image-generation tool.

What the QuillBot’s Marketing Doesn’t Tell You

QuillBot’s site leans hard on “unlimited paraphrasing” as a Premium headline. In practice, independent testing has flagged a roughly 25,000-word monthly soft ceiling on some of the AI generation features for Premium users, which matters if you’re publishing several long-form articles a month and expecting truly unbounded output rather than a very generous but finite allowance.

There’s also no API access on any plan, so if you’re trying to build QuillBot into an automated content pipeline rather than using it as a manual, one-document-at-a-time tool, it isn’t built for that.

The interface itself deserves credit: it’s clean, and the learning curve is close to zero. Paste text, pick a mode, review the output, done. The tradeoff for that simplicity is depth. Compared to ProWritingAid’s 25-plus style and readability reports, QuillBot’s feedback tells you what to change far more often than it tells you why, which is fine for a fast edit and limiting if you’re trying to actually grow as a writer over time rather than just clean up one document.

Who Built QuillBot, and Why That Matters

QuillBot, Inc. was founded in Chicago in 2017 by Rohan Gupta, David Silin, and Anil Jason, and Learneo (formerly Course Hero, Inc.) acquired it in 2021; Learneo is an education-technology holding company that also owns CliffsNotes, Scribbr, LitCharts, and Symbolab, a math-focused study tool.

That ownership detail is more than trivia: Scribbr’s free paraphrasing tool and AI detector run on QuillBot’s own underlying models, so if you’ve compared the two and assumed they were fully independent products, they’re closer to siblings than competitors.

SuccessPixel covers AI writing and content tools as an ongoing beat, testing paraphrasers, grammar checkers, and AI detectors against the same sample documents across reviews so the comparisons in this piece are apples-to-apples rather than one-off impressions from a single session.

QuillBot Pricing Plans: The Full Breakdown

QuillBot’s pricing hasn’t changed dramatically in structure since this review was last updated, but the numbers themselves are worth re-verifying every time, since AI tool pricing moves fast and stale numbers are the fastest way for a review to lose trust.

Free costs nothing and includes the limited feature set described above. Premium runs $19.95 billed monthly, works out to roughly $13.31 a month on the quarterly cycle, and drops to $8.33 a month ($99.95 billed once a year) on the annual billing cycle, which gives you the best effective rate. Team plans are billed annually as a single invoice and scale by seat count, with the per-seat rate dropping as the team grows.

Here’s the full breakdown in one place:

Plan	Price	Billing Cycle	What You Get
Free	$0	N/A	2 paraphrase modes (125-word cap), basic grammar checks, limited AI Humanizer (125 words, 6 uses/day), basic summaries (1,200 words), limited AI Detector
Premium Monthly	$19.95/mo	Monthly	Unlimited paraphrasing, all 9 modes, full AI Detector & Humanizer, 6,000-word summaries, plagiarism checker (20 pages/mo), advanced grammar
Premium Quarterly	~$13.31/mo	Every 3 months	Same feature set as Premium Monthly
Premium Annual	$8.33/mo ($99.95/yr)	Annually	Same feature set as Premium Monthly, lowest effective rate
Team (2–10 seats)	$7.50/seat/mo ($89.95/seat/yr)	Annually	Everything in Premium, plus writer-management dashboard, centralized billing
Team (11–50 seats)	$6.66/seat/mo ($79.95/seat/yr)	Annually	Same as above, 20% off
Team (51+ seats)	$5.83/seat/mo ($69.95/seat/yr)	Annually	Same as above, QuillBot’s top-discount “Best Value” tier, 30% off

A couple of things worth flagging that aren’t obvious from the pricing page alone. The plagiarism checker’s 20-page monthly cap applies on Premium too; it isn’t a free-tier-only limitation, so heavy checkers should budget for that ceiling regardless of which plan they’re on. And QuillBot has historically offered a short money-back window on new Premium purchases; confirm the current terms on QuillBot’s own billing help page before buying, since refund policies are among the details vendors tend to adjust without much notice.

On return on investment: if you’re rewriting more than a page or two a week, the $99.95 annual plan pays for itself quickly in time saved vs. manual editing, and at that billing cycle it undercuts every direct competitor covered in this review.

QuillBot Discount Code 2026: Save 20% Extra

If you want to save more on QuillBot Premium, use the GOPREMIUM discount code at checkout. You’ll get an extra 20% off the already reduced annual price. Instead of $99.95, you’ll pay $79.96 for a full year, which breaks down to $6.66 per month over 12 months.

This 20% discount stacks with QuillBot’s usual annual-plan savings; it doesn’t replace them. With the code, you’ll see the $79.96 total on the checkout page. That saves you $19.99. This is a better deal than the standard annual discount and means you’re getting QuillBot Premium for less than $7 a month.

How QuillBot Stacks Up Against the Competition

Price alone doesn’t answer whether QuillBot is the right tool. It answers whether it’s the cheapest one that does roughly the job. Here’s how it actually compares to the three tools people most often cross-shop against it.

QuillBot vs. Grammarly

Grammarly renamed its Premium plan to “Pro” in 2026 and folded its old Business tier into the same offering. Pro costs $12 a month on annual billing ($144 a year), $20 a month on quarterly billing, or $30 a month paid month-to-month, and it includes 2,000 AI prompts a month alongside grammar, tone, and plagiarism detection.

QuillBot’s annual Premium plan costs $8.33 per month, which is noticeably less than Grammarly Pro’s $12 monthly price.

Both QuillBot and Grammarly include extra tools like an AI Detector, Humanizer, Citation Generator, and Translator in that price, instead of charging more for them. That’s a great deal.

Grammarly still has the edge on grammar-checking depth and tone suggestions across long documents, and its browser integration feels slightly more polished for catching errors as you type in real time, live inside Gmail or Google Docs, rather than requiring a copy-paste workflow.

QuillBot vs. Wordtune

Wordtune, created by AI21 Labs, offers its Advanced plan for $13.99 per month or $6.99 per month if billed annually. The Unlimited plan costs $19.99 per month or $9.99 per month with annual billing, based on Wordtune’s current pricing. This means Wordtune is actually cheaper than QuillBot at the entry level.

The catch: Wordtune’s Advanced plan limits you to 30 rewrites each day. Even the Unlimited plan mainly focuses on rewriting and summarizing and doesn’t include features like QuillBot’s plagiarism checker, citation generator, or dedicated AI detector.

If you only need to rewrite short sections throughout the day, Wordtune’s lower-priced plan is a strong option. But if you work with full articles or need more tools, QuillBot’s uncapped Premium plan offers better value.

QuillBot vs. ProWritingAid

ProWritingAid Premium costs $30 a month or $10 a month with annual billing ($120 a year), plus a one-time $399 lifetime option. It also offers a Premium Pro tier: $36 a month or $12 a month with annual billing ($120 a year), plus a one-time $699 lifetime option for more AI and in-person features and extra support.

It serves a different purpose than QuillBot: 25+ in-depth writing analysis reports covering pacing, dialogue tags, sentence variety, and style consistency, aimed at novelists and long-form authors rather than quick paraphrasing or grammar cleanup.

If your writing task is a 90,000-word manuscript, ProWritingAid’s depth justifies its higher price. For blog posts, essays, professional emails, or academic assignments, QuillBot’s paraphraser and lower price make more practical sense for most readers of this review.

Value-to-Cost Verdict

At $8.33 a month billed annually, QuillBot Premium is the cheapest of the three paid alternatives once you weigh feature breadth, not just sticker price.

It doesn’t out-report ProWritingAid on writing style depth, and it doesn’t out-check Grammarly on grammar, tone suggestions, or humanizing. Still, it’s the only one of the three pairing a genuinely strong paraphraser with an AI detector, humanizer, and citation generator under one login for under $100 a year.

Putting It to the Test: Three Real Scenarios

Numbers on a pricing page only tell you so much. Here’s how QuillBot actually performs across the three situations that most readers of this review are probably in.

1. The Light, Occasional Users

You need to clean up a cover letter, rewrite an awkward email, or check a short passage before sending it. The free plan handles this completely. The 125-word cap is restrictive for anything longer, but for the sporadic, single-paragraph use case, there’s genuinely no reason to pay for a subscription you’d rarely touch.

2. The Power Users

You’re rewriting full articles, checking real volume for AI content, and want the plagiarism checker and citation generator inside the same workflow rather than juggling three separate tools. The annual Premium plan at $99.95 a year is the clear pick here, and this review recommends it for most people who’ve read this far. Just budget for the 20-page-a-month plagiarism cap if your checking volume runs high.

3. The Content Teams

You’re managing a content team of 2 to 50 writers who all need consistent access to paraphrasing, grammar checking, and AI detection. QuillBot’s Team plan, at $6.66 to $7.50 per seat billed annually, adds a writer-management dashboard and centralized billing that make onboarding and offboarding writers straightforward without juggling individual accounts.

Who Should Skip QuillBot

If you are a fiction writer or novelist looking for in-depth manuscript-level style analysis, ProWritingAid is a better choice. Its 25+ reports offer deeper insights than QuillBot’s surface-level suggestions. For those who mainly need polished, tone-aware business writing for Slack, email, or shared documents, Grammarly is likely the better option. It does a better job than QuillBot with contextual tone coaching.

Teams that need a highly accurate AI detector for real academic integrity decisions should use QuillBot alongside a dedicated tool like Originality AI, or consider switching to one. This matters because of the accuracy limits discussed earlier.

QuillBot Reviews: What Real Users Are Saying

QuillBot’s Trustpilot page showed a 4.8-star average across more than 13,623 reviews as of August 2026, with recent reviewers most often praising its speed and ease of use for grammar, paraphrasing, and research tasks.

On G2, QuillBot holds a 4.4-out-of-5 rating, with reviewers repeatedly highlighting how easily it slots into an existing writing workflow across desktop and browser.

The complaints that show up most consistently across review platforms center on the free plan’s tight word limits and, less frequently, on billing or cancellation friction. That’s worth knowing before you subscribe: if you try Premium and it isn’t a fit, plan to cancel promptly rather than assuming a generous grace period.

QuillBot FAQs

Final Verdict: Should You Actually Buy This?

Go back to the pain point that prompted this QuillBot review. If you are facing a tight deadline and struggling with a difficult paragraph, the Paraphraser alone makes the free plan worthwhile. The Premium plan is probably worth it if you regularly exceed the 125-word limit. If you are concerned about AI detectors flagging your original writing, QuillBot’s detector is a helpful first step, though it should be viewed as an indicator rather than a final conclusion, as QuillBot itself notes. For those managing high content volume, the full Premium suite offers strong value at $99.95 per year compared to other options reviewed here.

QuillBot in 2026 is a wider, more capable product than the paraphrasing tool it started as. It remains one of the best-value AI writing subscriptions, combining a robust paraphraser with a practical, though not flawless, AI detector, humanizer, and citation generator, all for less than Grammarly’s Pro plan. The paraphraser remains its main strength, while the added features provide real value.