Quilbot: Full Review, Practical Test & User Guide 2025

Estimated reading time: 11 minutes

Quilbot: Full Review, Practical Test & User Guide 2025

Are you looking for a tool to rewrite your texts, correct your mistakes or avoid plagiarism without spending hours on it? Quilbot has established itself as a leading brand by 2025, with millions of users worldwide. However, there’s often a gap between marketing promises and reality on the ground.

I tested it intensively for 30 days on my projects at DesignToads, and believe me, I discovered things that the marketing pages never mention. Does Quilbot really work well in French? Is the free version sufficient? Is the Premium version worth the price?

In this article, I share my unfiltered feedback: detailed features, practical test with concrete examples, price comparison in euros, real advantages and limitations, and my tips for using the tool like a pro. Zero bullshit…just concrete details.

The program includes: a complete presentation of the tool, analysis of the features, in-depth testing in French, a breakdown of Free vs Premium pricing, an objective assessment with a final rating, a user guide by profile, and a comparison with market alternatives.

What is Quilbot? An introduction to the tool

Quilbot is an AI-powered writing assistant specializing in paraphrasing, spell checking, and text optimization. Launched in 2017, the tool uses natural language processing (NLP) and deep learning technologies to rephrase, correct and improve your content in just a few clicks.

In concrete terms, Quilbot is not limited to a simple reformulator. The tool now integrates a complete suite of features: paraphraser with several reformulation modes, multilingual spelling and grammar checker, plagiarism detector, text summarizer, co-writer for writing assistance, academic citation generator, and even an AI detector to identify artificially generated content.

The numbers speak for themselves: millions of active users in more than 100 countriesPartnerships with recognized academic institutions, and widespread adoption by students, web writers, marketing professionals, and content creators have made it an essential tool for anyone who produces text regularly.

Advice Jordan Costa

Paraphrasing and reformulation are not exactly the same thing. Paraphrasing consists of expressing an idea differently while retaining the original meaning. Reformulation goes further by restructuring the statement to adapt it to a different context or audience. Quilbot does both, depending on the method chosen.

Who is Quilbot really aimed at? Primarily three profiles:

• Students : to rephrase quotations, avoid academic plagiarism, summarize research articles, and improve the quality of their dissertations or theses
• Writers and content creators : to vary the wording, improve the flow of the texts, correct mistakes quickly, and save valuable time on revisions
• Professionals : to write clear and error-free emails, produce polished reports, translate and adapt multilingual content

Quilbot’s Main Features

Quilbot is not simply a reformulator. It’s a complete toolbox for writing. Here is what the tool offers in concrete terms, feature by feature.

To paraphrase: The Heart of Quilbot

The reformulator is the flagship feature. It offers 8 different modes to adapt the reformulation according to your needs: Standard (balance between change and meaning), Fluency (maximum fluency), Creative (bold reformulation), Formal (professional tone), Shorten (reduction of the number of words), Expand (expansion), Simple (simplification of vocabulary), and Custom (customizable in Premium).

In practice, Standard mode works well in 80% of cases. Fluency mode is excellent for improving readability, while Creative mode takes more liberties but can distort some nuances. The free version only offers two modes (Standard and Fluency), with a limit of 125 words per rewrite. Concrete result : this is more than enough to test the tool, but frustrating for intensive use.

Grammar Checker: Spelling and Grammar Checker

The built-in spell checker detects spelling, grammar, punctuation, and syntax errors. It supports several languages, including French, English, Spanish, and German. The detection quality in French is good, comparable to other tools on the market, although it falls slightly short of its English counterpart.

Quilbot offers contextual corrections, meaning it analyzes the meaning of the sentence to suggest the best correction. For example, it differentiates between “a” and “à,” and “ces” and “ses,” depending on the context. Corrections are unlimited even in the free version, which is a real advantage.

Plagiarism Checker: Plagiarism Detector

Please note, this feature is only available with the Premium plan. The detector compares your text with billions of online sources (academic articles, websites, publications) to identify duplicate passages. With Premium, you get 20 pages of verification per month, which corresponds to approximately 5,000-6,000 words per page, depending on the format.

Let’s be clear: this detector is useful for verifying that your rewording is indeed unique, but it doesn’t replace Turnitin or the institutional anti-plagiarism tools used by universities. It’s more of an initial check before submission.

Summarizer: Text Summarizer

The summary tool condenses a long text into a few key sentences or paragraphs. It offers two formats: bullet points (bulleted list) or paragraph (written summary). In the free version, the limit is 1200 words. In the Premium version, you can summarize up to 6000 words.

In practice, this is very useful for summarizing research articles, reports, or interview transcripts. The quality of the summary depends heavily on the structure of the original text: the more organized it is, the better the summary will be.

Co-Writer: AI Writing Assistant

The Co-Writer combines several features in a single interface: rewriting, editing, wording suggestions, and structural assistance. It’s a bit like having an AI editor that guides you through the writing process. This feature is particularly useful for longer projects (blog posts, theses, reports).

Citation Generator and AI Detector

The citation generator automatically formats your sources according to academic standards (APA, MLA, Chicago). This is especially useful for students who struggle with bibliographies.

The recently added AI detector analyzes text to determine if it was generated by artificial intelligence (ChatGPT, Jasper, etc.). What really worksThe thing is that Quilbot is now playing on both fronts: it helps you generate AI content, while also offering a tool to detect that of others.

Functionality	Description	Free plan	Premium Plan
Paraphrase	Text rewriting with 8 modes	2 modes, 125 words max	8 modes, unlimited
Grammar Checker	Spelling and grammar correction	Unlimited	Unlimited
Plagiarism Checker	Plagiarism detection	Not available	20 pages/month
Summarizer	Text summary	1200 words max	6000 words max
Co-Writer	AI writing assistant	Limit	Complete
Quote Generator	Generation of academic citations	Basic	Advance
AI Detector	AI Content Detection	Limit	Complete

Does Quilbot Work Well in French? (Practical Test)

Yes, Quilbot works in French, but with some nuances compared to the English version. I conducted several tests on texts of different natures (academic, professional, conversational) to evaluate the actual quality of the reformulation.

Test #1: Academic Text

Original text (120 words):
“Artificial intelligence is profoundly transforming professional practices in many sectors. Companies are gradually adopting these technologies to automate repetitive tasks, improve decision-making, and optimize their operational processes. However, this transformation raises important ethical and social questions, particularly regarding the impact on employment and the protection of personal data.”

Quilbot result (Fluency mode):
“Many sectors are undergoing a profound transformation of their professional practices thanks to artificial intelligence. Companies are gradually integrating these technologies to automate repetitive tasks, optimize decision-making, and improve their operational processes. However, this evolution raises major ethical and social questions, particularly regarding the impact on employment and the protection of personal data.”

Verdict: The reformulation is correct, fluid, and retains the meaning well. Quilbot varied the vocabulary (“connaissent” instead of “transforme”, “intègrent” instead of “adoptent”, “toutefois” instead of “cependant”) while maintaining the logical structure. No grammatical errors were detected.

Test #2: Conversational Text

Original text:
“Honestly, this tool really impressed me. I had doubts at first, but after testing it on several projects, I have to say it’s a game changer. The time savings are enormous.”

Quilbot result (Standard mode):
“Honestly, this tool really impressed me. At first, I had doubts, but after testing it on several projects, I have to say it changes everything. The time saved is considerable.”

Verdict: The reformulation loses some of the original conversational tone (“frankly” becomes “honestly”, “that changes the game” becomes “that changes everything”). The result is more formal, which can be an advantage or a disadvantage depending on the context.

Advice Jordan Costa

To optimize Quilbot in French, I recommend Fluency mode for formal texts, and Standard mode to maintain a more natural tone. And above all, always reread The reformulation before validation. AI can sometimes distort a subtle nuance.

French vs. English Comparison

After testing both versions, it’s clear that the quality in French is slightly lower than in English. Quilbot’s algorithms were primarily trained on English-language corpora, which explains this difference. In French, we occasionally observe:

• Slightly awkward phrasing (less than 10% of reformulations)
• A loss of subtlety in idiomatic expressions
• A tendency to formalize the tone, even in Standard mode

Concrete result: Quilbot in French is perfectly usable and effective for 90% of needs. However, for highly technical texts (literary, poetic, legal), careful human proofreading remains essential.

Quilbot Free or Premium? Price Comparison

Let’s talk money. Let’s be clear: Quilbot offers a free version that is functional, but limited. The real question is whether the Premium version is worth its price depending on your usage.

Plan Free: Limitations

The free version allows you to test the tool without obligation, but with significant limitations:

• Maximum 125 words per reformulation – which corresponds to 2-3 short sentences. To rewrite an entire paragraph, you need to break the text down into several parts.
• Only 2 modes of paraphrasing (Standard and Fluency) out of the 8 available
• No access to the plagiarism detector
• Summary limited to 1200 words
• Limited Co-Writer and AI Detector features

In practice, the Free plan is suitable for occasional use (correcting an email, rewriting a complex sentence), but quickly becomes frustrating for regular use.

Premium Plan: Pricing and Benefits

The Premium plan costs approximately $19.95/month (approximately €18-19/month at the current exchange rate) If you opt for the monthly subscription. But the rates become much more attractive with a longer commitment:

• Monthly subscription: ~€19/month
• Six-month subscription: ~€13/month (i.e., ~€78 for 6 months)
• Annual subscription: ~€8-10/month (or ~€99 for 12 months) – best value for money

With Premium, you unlock:

• Unlimited reformulations no word limit
• 8 ways to paraphrase including Creative, Formal, Shorten, Expand
• Plagiarism detector up to 20 pages/month
• Summary of up to 6000 words
• Full Co-Writer and AI Detector
• Advanced Integrations (premium Chrome extension, Microsoft Word, Google Docs)

Criteria	Free plan	Premium Plan
Price	€0	€8-19/month depending on commitment
Words by reformulation	125 words max	Unlimited
Modes of paraphrasing	2 (Standard, Fluency)	8 (all modes)
Plagiarism detector	No	20 pages/month
Summary	1200 words max	6000 words max
Full Co-Writer	No	Yes
Customer support	Basic	Priority

Premium: Profitable or Not?

Calculating ROI in practice: If you spend 2 hours a week rewriting, correcting, and optimizing texts, Quilbot Premium saves you approximately 50% of that time, or 1 hour per week. Over a month, that adds up to 4 hours. If your time is worth €20-30/hour (freelance rate or average salary cost), the tool pays for itself within the first month.

Verdict by profile:

• Intensive student use (dissertation, thesis): A must-have premium product, especially for its plagiarism detector.
• Professional web writer: Premium becomes profitable with just 5 hours of use per month
• Occasional use (a few emails/month): Free plan more than sufficient
• Professional/business: Premium recommended for credibility (error-free texts)

To remember

The annual Premium plan (~€99/year) offers the best value for money. If you’re unsure, try the monthly plan for a month first to assess your actual usage before committing to a year.

Advantages and Disadvantages of Quilbot (Our Opinion)

After 30 days of intensive use on different types of projects (blog articles, customer emails, marketing content, technical documentation), here is my objective assessment.

The Advantages of Quilbot

• Exceptional versatility – Multiple tools in one (paraphrasing, editing, summarizing, plagiarism detection, citation). You don’t need to juggle 5 different applications.
• Intuitive and fast interface – Instantly easy to use, even for non-technical users. Copy and paste the text, choose the mode, click on “Paraphrase”. Result in 2 seconds
• Functional multilingual support French, English, Spanish, and German supported. Practical for international projects.
• Free plan without obligation – You can test the tool without a credit card. There’s no limited trial period; the free access is permanent.
• Massive time saving – Manually rewriting a paragraph takes 5-10 minutes. With Quilbot, it’s done in 10 seconds. Over a week, that represents hours saved
• Multiple integrations – Chrome extension, Microsoft Word and Google Docs plugins. The tool integrates directly into your usual workflow
• Regular updates Quilbot regularly adds new features (AI detector, new paraphrase modes). The tool is evolving rapidly.

The Disadvantages of Quilbot

• 125-word limit in the free version – Too restrictive for serious use. It forces you to cut the text into tiny chunks, which breaks the coherence.
• AI addiction – Quilbot can rephrase effectively, but he sometimes loses the subtle nuances, the irony, or the author’s specific tone. Human proofreading remains essential.
• High premium price for occasional use €19/month is expensive if you only use it 2-3 times a month. The annual rate is more reasonable, but requires a commitment.
• Quality varies depending on the language – Excellent in English, adequate in French, but some imperfections remain. French idiomatic expressions are sometimes poorly handled.
• Risk of over-optimization Used indiscriminately, Quilbot can produce overly “polished” texts, lacking personality. A balance must be maintained between automation and a human touch.

Overall Rating: 4.3/5

Final verdict: Quilbot is an excellent tool that delivers on its promises for anyone who regularly produces written content. The advantages far outweigh the disadvantages, provided it’s used intelligently (systematic proofreading, adapting the tone, checking for nuances). For students and professional writers, it’s a worthwhile investment. For very occasional use, the Free plan may suffice.

User testimonial (Jerry Keszka, student): “What makes Quilbot so effective is that it drastically reduces the time I spend on tasks such as paraphrasing and structuring. I can now focus on more important aspects of my work, such as research and analysis.”

How to Use Quilbot Effectively? (Practical Guide)

Quilbot is easy to learn, but using it effectively requires understanding a few subtleties. Here’s my step-by-step guide, with tips tailored to your user profile.

Basic Usage Steps

1. Create a free account Go to quillbot.com, click “Sign Up,” and create an account with your email address. No credit card is required for the Free plan.
2. Choosing the Right Feature – Paraphrase to rephrase, Grammar Checker to correct, Summarizer to summarize, Co-Writer for complete assistance
3. Copy and paste your text – Select the text to be processed, copy it (Ctrl+C or Cmd+C), and paste it into the Quilbot interface
4. Select the appropriate mode – Standard (balanced), Fluency (fluidity), Creative (originality), Formal (professional), Shorten (concise), or Expand (development)
5. Click on “Paraphrase” – The tool generates the reformulation in 1-2 seconds
6. Proofread and adjust – Critique: NEVER approve blindly. Reread the reformulation, check that the meaning is preserved, and adjust any wording that sounds odd.
7. Copy the final result – Once satisfied, copy the reformulated text and integrate it into your document

Use Cases by Profile

For Students:

• Rewording quotes – Use Fluency mode to paraphrase passages from authors while preserving the meaning. Always include the original source.
• Avoid plagiarism – Rewrite your own sentences to diversify the wording in a dissertation or thesis. Then check with the plagiarism detector (Premium).
• Summarizing academic articles Paste a research article into the Summarizer, extract the key points as bullet points, and then write your personal summary.
• Correct errors before submitting Always run your work through the Grammar Checker before submitting an assignment. It eliminates 95% of basic mistakes.

For Web Editors:

• Vary your SEO wording – Rewrite similar paragraphs to avoid duplicating content on different pages. Standard mode recommended.
• Improve fluency – Switch your drafts to Fluency mode to improve readability and eliminate awkward sentences
• Adapt the tone – Use Formal mode to professionalize overly conversational text, or Creative mode to add dynamism to bland content
• Saves time on revisions – Rather than manually rewriting 10 variations of the same sentence, let Quilbot generate 3-4 options and choose the best one

For Professionals:

• Write clear emails Write your email quickly, then run it through Grammar Checker + Formal mode for a professional, error-free result.
• Produce well-written reports Use the Co-Writer to structure your reports, the Paraphraser to avoid repetition, and the Grammar Checker for polishing.
• Translating and adapting content – Quilbot supports multiple languages. Translate first with Google Translate, then rephrase with Quilbot to improve fluency.

Trick

Install the Quilbot Chrome extension. It integrates directly with Gmail, Google Docs, LinkedIn, and most web interfaces. You can rewrite or correct text without leaving your tab. The result: even more time saved.

Mistakes to Avoid

• Confirm without reviewing – Quilbot isn’t perfect. Always reread to check the meaning and nuances
• Completely rewriting a text without citing the source – It’s still plagiarism, even if it’s reformulated. Cite your sources
• Use Creative mode for academic texts This mode takes too many liberties. Choose Standard or Fluency to maintain consistency.
• Do not adjust the result to your personal tone Quilbot produces generic text. Add your personal touch to avoid an overly bland style.

Quilbot vs. Alternatives: Comparison with Other Tools

Quilbot isn’t alone in the market. Several alternatives exist, each with its own strengths and weaknesses. Here’s how Quilbot positions itself against the competition.

Quilbot vs Grammarly

Grammarly is the undisputed leader in spelling and grammar checking, particularly in English. It excels at detecting complex errors, suggesting styles, and providing clear explanations.

Comparison :

• Spelling correction – Grammarly > Quilbot (more precise, better explanations)
• Paraphrase/reformulation – Quilbot > Grammarly (Grammarly does not have a dedicated rephraser)
• French support – Equality (both are correct but imperfect)
• Price – Quilbot Premium ~€99/year vs Grammarly Premium ~€140/year → Quilbot more affordable

Verdict: If your priority is pure spell checking, choose Grammarly. If you need a versatile tool (correction + rewriting + summarization), choose Quilbot. In my workflow, I use both: Grammarly for final corrections, Quilbot for rewriting.

Quilbot vs Paraphraser.io

Paraphraser.io is a simpler tool, focused solely on paraphrasing. It is free with limitations similar to Quilbot Free (500 characters max per paraphrase).

Comparison :

• Reformulation quality – Quilbot > Paraphraser.io (more sophisticated algorithms)
• Simplicity – Paraphraser.io > Quilbot (minimalist interface, no account required)
• Features – Quilbot > Paraphraser.io (complete suite vs. single tool)
• Free price – Equality (both offer a limited Free plan)

Verdict: Paraphraser.io is suitable for very occasional and simple use. Quilbot is superior as soon as you need quality, advanced features, or regular use.

Quilbot vs ChatGPT

ChatGPT is a generalist AI capable of generating complete content, answering questions, and reformulating texts via prompts.

Comparison :

• Specialization paraphrase – Quilbot > ChatGPT (dedicated tool vs. general prompt)
• Overall versatility – ChatGPT > Quilbot (content generation, brainstorming, code, etc.)
• Ease of use for reformulation – Quilbot > ChatGPT (1 click vs prompt writing)
• Price – Free ChatGPT (GPT-3.5) or €20/month (GPT-4) vs Quilbot €8-19/month

Verdict: Quilbot is a specialized tool optimized for paraphrasing, with a dedicated interface and pre-configured modes. ChatGPT is more versatile but requires writing precise prompts to achieve equivalent results. For quick and efficient paraphrasing, Quilbot is more practical. For generating complete content or brainstorming, ChatGPT is unbeatable.

Criteria	Quilbot	Grammarly	ChatGPT
Paraphrase	Excellent	Absent	Okay (via prompt)
Ortho correction	Good	Excellent	AVERAGE
Plagiarism detection	Yes (Premium)	Yes (Premium)	No
Price	€€ (~99 €/year)	€€€ (~140 €/year)	Free / €€ (€20/month GPT-4)
French support	Correct	Correct	Excellent
Ease of use	Very simple	Very simple	Requires prompts

Frequently Asked Questions

Is Quilbot free?

Yes, Quilbot offers a functional free version, but limited to 125 words per reformulation and 2 paraphrase modes. This free version is permanent (no limited trial period) and allows you to test the tool without a credit card. It’s suitable for very occasional use (correcting an email, rewriting a complex sentence), but quickly becomes insufficient for regular or professional use. Advanced features like the plagiarism detector, the six additional rewriting modes, and the extended summarizer require a Premium subscription.

Does Quilbot work well in French?

Yes, Quilbot works in French with decent quality, but slightly inferior to the English version. I tested the tool on several types of texts (academic, professional, conversational) and the paraphrasing was fluent in 90% of cases. Quilbot’s algorithms were trained primarily on English-language corpora, which explains some occasional imperfections in French: rare awkward phrasing, a loss of subtlety in idiomatic expressions, and a tendency to over-formalize the tone. To optimize the quality in French, I recommend using the Fluency mode and systematically proofreading the paraphrases.

Can Quilbot detect plagiarism?

Yes, Quilbot includes a plagiarism detector in its Premium version, capable of scanning up to 20 pages per month. This feature compares your text with billions of online sources (academic articles, websites, publications) to identify duplicate passages. It’s useful for verifying that your rewording is truly unique before submitting academic work or publishing content. However, be aware that this detector does not replace institutional plagiarism detection software like Turnitin used by universities. It’s an initial check, not a guarantee.

Is Quilbot detectable by teachers?

Texts reformulated by Quilbot may be detected by some anti-plagiarism software if the reformulation is too automatic or if the original text is clearly identifiable. AI detectors are evolving rapidly and becoming increasingly adept at identifying tool-generated rewrites. My recommendation: use Quilbot as an assistant, not as a substitute for your own writing. Always rewrite in your own words to complement the tool’s suggestions, systematically reread and personalize them, and above all, always cite your original sources. The ethical use of Quilbot is to improve your expression, not to completely rewrite uncited work.

How much does Quilbot Premium cost?

Quilbot Premium costs around €18-20/month on a monthly subscription basis, with significant discounts for longer commitments. Here are the detailed prices (converted from dollars): monthly subscription at approximately €19 per month with no commitment, six-month subscription at approximately €13 per month (approximately €78 for 6 months), and annual subscription at approximately €8-10 per month (approximately €99 for 12 months) – this is the best value for money. Quilbot also offers special deals for students and academic institutions, with discounts of up to 30 percent. The Premium subscription unlocks unlimited rewrites, 8 paraphrase modes, plagiarism detection, an extended summarizer, and all advanced features.

What is the difference between Quilbot and ChatGPT?

Quilbot is a tool specializing in paraphrasing and text correction, while ChatGPT is a generalist AI capable of generating complete content but less precise for targeted reformulation. Quilbot is optimized for specific tasks: rewriting existing text using different modes (Fluency, Creative, Formal), correcting spelling and grammar, summarizing documents, and detecting plagiarism. It has a dedicated interface with a one-click workflow. ChatGPT, on the other hand, is much more versatile (generating complete content, brainstorming, coding, analysis, conversation) but requires writing precise prompts to achieve rewriting results equivalent to Quilbot. In practice, I recommend Quilbot for academic paraphrasing and quick editing, and ChatGPT for brainstorming, generating original content, and complex creative tasks.

My Final Verdict on Quilbot in 2025

After 30 days of intensive testing, here is my unfiltered opinion. Quilbot is a solid tool that delivers on its promises for anyone who produces written content regularly. It significantly speeds up reformulation, eliminates basic errors, and offers a coherent and well-thought-out suite of features.

Key points to remember:

• Quilbot works correctly in French, with slightly lower quality than the English version but perfectly usable for 90% of needs.
• The free version is limited (125 words) but allows you to thoroughly test the tool before investing.
• Premium becomes cost-effective with just 5 hours of use per month – simple calculation: time saved vs. monthly cost
• The tool does not replace human proofreading, but it saves considerable time on repetitive tasks.
• For students, web writers, and professionals who write daily, it’s an investment that pays for itself.

In practice, here’s what really works: Quilbot excels at academic rewriting, improving fluency, and quick proofreading before publication. It falls slightly short with highly creative texts (literary, advertising) where nuances are crucial. My optimal use case: I first write my content manually, then I run complex or repetitive passages through Quilbot to improve their flow, and I finish with a careful human review.

Let’s be clear: Quilbot is not magic. It’s a smart assistant, not a standalone writer. Used wisely, it becomes a real game-changer in your content production workflow. Used blindly, it produces soulless, generic text. The difference is you.

And you, do you already use Quilbot or another paraphrasing tool? Share your experience in the comments, I’m curious to know how you integrate it into your daily workflow!