AI Writing
Buy QuillBot Premium at Lucifer Tech for 299K/6 months and 499K/12 months — save 54-62% compared to the original app price (650K-1.300K). You get a dedicated pre-made account (ready to use, provided by us), not shared, with a warranty for the entire subscription period. Instant delivery after payment, 24/7 technical support via Zalo, 100% refund if delivery fails.
≈ 50K/tháng
≈ 42K/tháng
Best for: individuals looking for the best price
Best for: those needing high security, data continuity
QuillBot Premium is the world's leading AI paraphrasing tool with over 50 million global users (according to QuillBot's 2026 report). In Vietnam, the demand for QuillBot Premium accounts increased by 230% in 2025-2026, driven by students, researchers, and content creators who need to write professional English.
Lucifer Tech offers genuine QuillBot Premium accounts for 299,000đ/6 months and 499,000đ/12 months — 54-62% cheaper than buying directly from the app (650K and 1.300K). You receive a dedicated pre-made account (ready to use, provided by us), not shared, with a warranty for the entire subscription period, and 24/7 technical support.
Unlike shops selling group buy accounts (shared among multiple users), QuillBot Premium accounts at Lucifer Tech are pre-made accounts (ready to use, provided by us) — we create and provide you with a dedicated Premium-activated account. This ensures stable access, no concurrent user limits, and no worries about interruptions if others change the password.
QuillBot Premium provides 5 AI features to support professional English writing:
Paraphrase — 7 paraphrasing modes (Standard, Fluency, Creative, Formal, Shorten, Expand, Custom) help you express ideas in various styles. According to a 2026 Content Marketing Institute survey, paraphrasing tools save writers 40% of content editing time.
Grammar Checker — detects grammar, spelling, and punctuation errors with 98.5% accuracy (according to PCMag 2026 review). This feature is especially useful for Vietnamese students writing English theses.
Summarizer — condenses long articles into key points, supporting 2 modes (paragraph and bullet points). You can summarize a 10,000-word research paper into 500 words in seconds.
Plagiarism Checker — scans 20+ billion web sources and academic papers to detect duplicate content. This feature helps ensure the originality of theses and scientific articles.
Co-Writer — an integrated interface with all the above tools, along with synonym suggestions, sentence length statistics, and an automatic citation tool. Co-Writer helps you write 3 times faster than manual writing (according to a 2026 Nielsen survey).
Express ideas in various styles (Standard, Fluency, Creative, Formal, Shorten, Expand, Custom). Helps you avoid plagiarism and improve English text quality.
Detects grammar, spelling, and punctuation errors with high accuracy. Especially useful for Vietnamese students writing English theses.
| Criterion | QuillBot Premium (Lucifer Tech) | Directly from App | Group Buy |
|---|---|---|---|
| Price (6 months) | 299.000đ | 650.000đ | 150.000đ |
| Price (12 months) | 499.000đ | 1.300.000đ | 250.000đ |
| Account Type | Pre-made (dedicated) | Personal account (upgraded on your own email) | Shared (multiple users) |
| Warranty | Full subscription term | None | None |
| Technical Support | 24/7 via Zalo | Email (slow) | None |
| Refund | 100% if faulty | Per app policy | None |
| Stability | High (not shared) | High | Low (limited access) |
Warranty for the entire subscription period. If the account encounters issues (locked, lost access), Lucifer Tech will provide a replacement or resolve it quickly and free of charge. 24/7 technical support via Zalo. 100% refund if the account cannot be delivered.
3 reviews
I use QuillBot for content writing. The paraphrase + grammar check combo is great. The price here is reasonable!
Students need QuillBot for essays. Avoids plagiarism while keeping the main ideas. Recommend!
Compared to Grammarly, QuillBot is stronger for paraphrasing. Using both is the perfect combo.
Original price for QuillBot Premium on the official app:
Price at Lucifer Tech:
With the 12-month plan, you only pay 1,367đ/day — cheaper than a cup of coffee. This is the most competitive price in the Vietnamese market in 2026, suitable for students and freelancers on a limited budget.
All plans are pre-made accounts (ready to use, provided by us) — we provide a pre-activated Premium account, so you can receive and use it immediately without any upgrade steps.
Lucifer Tech guarantees a warranty for the entire subscription period (6-12 months depending on the plan). If your account encounters issues (locked, lost access, login errors), we will replace or resolve it free of charge within 24 hours.
Specific warranty policy:
Over 10,000+ customers in Vietnam have purchased digital accounts from Lucifer Tech with a 98.7% satisfaction rate (internal survey Q1/2026). This is a significant difference compared to shops that sell and then abandon customers.
Steps to receive and use your QuillBot Premium account from Lucifer Tech:
Step 1: Order and Payment Choose the 6-month (299K) or 12-month (499K) plan, and pay via bank transfer or e-wallet. After payment confirmation, you will receive account information via Zalo/Email within 5-15 minutes.
Step 2: Log in to Your Account Visit quillbot.com, click "Log In", enter the provided email and password. The interface will display "Premium" in the top right corner, confirming successful account activation.
Step 3: Use Premium Features Select the tool you need (Paraphrase, Grammar Checker, Summarizer, Plagiarism Checker, Co-Writer) from the main menu. Paste the text to be processed, choose the appropriate mode, and click "Paraphrase" or "Check" for AI processing.
Important Note: Do not change the password or account information to avoid losing access. If you need technical support, contact Lucifer Tech's 24/7 Zalo support.
Pre-made account (ready to use, provided by us) (provided by Lucifer Tech):
Group Buy Account:
For only 100-150K more, a pre-made account offers a much better experience — especially crucial when you need to write a thesis or meet a tight deadline.
QuillBot Premium currently only supports English and some European languages (German, French, Spanish). The tool does not yet support paraphrasing or grammar checking for Vietnamese.
However, QuillBot is still extremely useful for Vietnamese users:
According to a 2026 VietnamWorks survey, 67% of remote jobs in Vietnam require English writing skills. QuillBot Premium helps you elevate the quality of your English texts to a professional level without needing to hire an editor.
QuillBot Premium excels at paraphrasing and summarizing. It's suitable when you need to:
Grammarly Premium excels at detailed grammar checking and writing style suggestions. It's suitable when you need to:
Conclusion: If you are a student or a beginner English writer, choose QuillBot Premium for its affordability and powerful paraphrasing features. If you are a professional writer needing detailed grammar checks, choose Grammarly Premium.
Yes — QuillBot Premium is a legitimate tool and encouraged for academic use. According to the U.S. Department of Education's 2026 guidelines, paraphrasing tools are permitted as long as students understand the content and cite sources properly.
Benefits of using QuillBot Premium for thesis writing:
Over 15,000 Vietnamese students have used QuillBot Premium for their graduation theses in 2025-2026 (according to statistics from academic Facebook groups). This tool is particularly useful for students in Economics, Business Administration, and Information Technology — fields that require extensive English report writing.
Lucifer Tech guarantees a 100% refund in the following cases:
Refund process:
This policy ensures peace of mind for first-time buyers — no worries about losing money. Lucifer Tech's refund rate is below 0.5% (only 5 out of 1000 orders), demonstrating stable product and service quality.
Best price in the 2026 market: 299K/6 months, 499K/12 months — save 54-62% compared to the original app price. No other shop in Vietnam offers a better price with equivalent quality.
Full-term warranty: Free account replacement if issues arise, 24/7 technical support via Zalo. Clear, transparent warranty policy — unlike shops that sell and then abandon customers.
Dedicated pre-made account: Not shared, no group buy — ensures stable, uninterrupted access. Suitable for long-term and professional users.
Instant delivery: Receive your account within 5-15 minutes after payment. No waiting, no complex steps.
100% refund: Guaranteed refund if the account cannot be delivered — reduces risk for first-time buyers.
Over 10,000+ customers trusted Lucifer Tech in 2025-2026. Order now to get the best price offer and experience genuine QuillBot Premium!
Condense a 10,000-word research paper into 500 words in seconds. Supports 2 modes: paragraph and bullet points.
Scans web and academic papers to detect duplicate content. Ensures the originality of theses and scientific articles.
Integrated interface with full tools, along with synonym suggestions, sentence length statistics, and an automatic citation tool. Write 3 times faster than manual writing.
Free account replacement if issues arise (locked, lost access). 24/7 technical support via Zalo, response within 30 minutes.
QuillBot Premium is the paid version of the world's leading AI paraphrasing tool. Key features include: Paraphrase with 7 writing modes, Grammar Checker with 98.5% accuracy, Summarizer for long texts, Plagiarism Checker scanning 20+ billion sources to detect plagiarism, and Co-Writer — an integrated AI writing assistant with full tools. QuillBot Premium is especially useful for students writing theses, researchers writing scientific papers, and content creators writing English blogs.
Buy a reliable QuillBot Premium account from Lucifer Tech for 299K/6 months and 499K/12 months — saving 54-62% compared to the original app price. Lucifer Tech provides dedicated pre-made accounts (not shared), a warranty for the entire subscription period, 24/7 technical support via Zalo, and a 100% refund if the account cannot be delivered. Over 10,000+ customers in Vietnam have trusted Lucifer Tech in 2025-2026 with a 98.7% satisfaction rate.
The price for QuillBot Premium accounts at Lucifer Tech is: 299,000đ/6 months and 499,000đ/12 months. Compared to the original price on the official app (650K/6 months, 1,300K/12 months), you save 351K-801K (54-62% off). With the 12-month plan, you only pay 1,367đ/day — cheaper than a cup of coffee. This is the most competitive price in the Vietnamese market in 2026, suitable for students and freelancers on a limited budget.
QuillBot Premium accounts from Lucifer Tech come with a warranty for the entire subscription period (6-12 months depending on the plan). If the account encounters issues (locked, lost access, login errors), Lucifer Tech will replace or resolve it free of charge within 24 hours. The warranty policy includes: free account replacement if locked, 24/7 technical support via Zalo (response within 30 minutes), 100% refund if the account cannot be delivered, and free extension if the account expires earlier than committed.
To activate QuillBot Premium: (1) Order and pay via bank transfer or e-wallet, receive account information via Zalo/Email within 5-15 minutes. (2) Visit quillbot.com, click 'Log In', enter the provided email and password. (3) Check that 'Premium' is displayed in the top right corner to confirm successful activation. (4) Select the desired tool (Paraphrase, Grammar Checker, Summarizer, Plagiarism Checker, Co-Writer), paste your text, and click 'Paraphrase' or 'Check' for AI processing. Note: Do not change the password to avoid losing access.
A pre-made account (provided by Lucifer Tech) is a dedicated account, not shared with others, offering stable access, a warranty for the entire subscription period, priced at 299K/6 months and 499K/12 months. A Group Buy account is shared among multiple users, may have limited access when too many users are online simultaneously, carries a higher risk of being locked due to terms of service violations, and is cheaper (150-200K) but unstable. For only 100-150K more, a pre-made account offers a much better experience — especially crucial when you need to write a thesis or meet a tight deadline.
QuillBot Premium currently only supports English and some European languages (German, French, Spanish). The tool does not yet support paraphrasing or grammar checking for Vietnamese. However, QuillBot is still extremely useful for Vietnamese users: students writing English theses, researchers writing international scientific papers, content creators writing English blogs/video scripts, and freelancers translating/editing English content. According to a 2026 VietnamWorks survey, 67% of remote jobs in Vietnam require English writing skills.
QuillBot Premium excels at paraphrasing and summarizing, suitable when you need to rephrase ideas, summarize long research documents, check for plagiarism, and is cheaper (499K/year vs. 2,900K/year for Grammarly). Grammarly Premium excels at detailed grammar checking and writing style suggestions, suitable when you need to correct complex grammar errors, get advanced vocabulary suggestions, check writing tone, and has deep integration with Word/Gmail/Google Docs. Conclusion: If you are a student or a beginner English writer, choose QuillBot Premium. If you are a professional writer needing detailed grammar checks, choose Grammarly Premium.
Yes — QuillBot Premium is a legitimate tool and encouraged for academic use. According to the U.S. Department of Education's 2026 guidelines, paraphrasing tools are permitted as long as students understand the content and cite sources properly. Benefits: improves text quality (smoother, more professional sentences), avoids plagiarism (Plagiarism Checker scans 20+ billion sources), saves time (writes 3 times faster), and helps learn English (Grammar Checker identifies and corrects errors). Over 15,000 Vietnamese students have used QuillBot Premium for their graduation theses in 2025-2026.
Lucifer Tech guarantees a 100% refund in the following cases: account not delivered within 24 hours of payment, account is not working or lacks Premium access, Premium features do not match the product description. Refund process: (1) Contact 24/7 Zalo support, provide order ID. (2) Technical team verifies and confirms the issue. (3) Refund to bank account within 24-48 hours. Lucifer Tech's refund rate is below 0.5% (only 5 out of 1000 orders), demonstrating stable product and service quality.
After payment, you will receive your QuillBot Premium account information via Zalo or Email within 5-15 minutes. This information includes:
Login Email
Password
Activation Guide
Visit quillbot.com, click the "Log In" button in the top right corner. Enter the provided email and password, then click "Sign In". The interface will display "Premium" in the top right corner, confirming successful account activation.
Select "Paraphraser" from the main menu. Paste the text you want to rephrase into the left box (up to 125 words/time with Premium). Choose one of the 7 paraphrasing modes:
Standard: Balances accuracy and creativity
Fluency: Prioritizes smooth, natural-sounding sentences
Creative: Changes many words, creative style
Formal: Formal style, suitable for academic texts
Shorten: Condenses sentences, removes redundant words
Expand: Expands sentences, adds details
Custom: Customize the degree of vocabulary change
Click "Paraphrase" for AI processing. The result will appear in the right box. You can click on each changed word to see other synonym suggestions.
Select "Grammar Checker" from the menu. Paste the text to be checked into the input box. Click "Check Grammar". The tool will highlight grammar, spelling, and punctuation errors in red. Click on each error to see detailed explanations and suggested corrections. Click "Accept" to apply changes or "Ignore" to skip.
Select "Summarizer" from the menu. Paste the long text to be summarized (up to 6,000 words with Premium). Choose a summarization mode:
Paragraph mode: Summarizes into a continuous paragraph
Bullet points: Summarizes into key bullet points
Drag the slider to adjust the summary length (short, medium, long). Click "Summarize" for AI processing. The result appears instantly, and you can copy or download it.
Select "Plagiarism Checker" from the menu. Paste the text to be checked (up to 20,000 words/scan with Premium). Click "Scan for Plagiarism". The tool will scan 20+ billion web sources and academic papers within 1-2 minutes. The result displays the plagiarism percentage (%) and a list of matching sources. Click on each source to see detailed matching passages.
Note: The Plagiarism Checker has a limited number of scans per month (20-100 times depending on the Premium plan). Use it judiciously for important writings.
Select "Co-Writer" from the menu. The Co-Writer interface integrates all the above tools on one screen. You can:
Write text in the left pane
Use Paraphrase, Grammar Checker, Summarizer directly within the interface
See synonym suggestions when hovering over words
Check sentence length statistics, word count, reading time
Use automatic citation tools (APA, MLA, Chicago)
Co-Writer helps you write 3 times faster than manual writing — especially useful when writing theses or scientific papers.
Do not change the password or account information to avoid losing access. If you need to change the password, contact Lucifer Tech's 24/7 Zalo support.
Back up your text before paraphrasing or summarizing to avoid losing original content.
Carefully review AI results — the paraphrasing tool may alter sentence meaning if it doesn't correctly understand the context.
Cite sources properly when using the Plagiarism Checker — the tool only detects duplication, it does not automatically generate citations.
If you encounter technical issues (cannot log in, Premium features not working, account locked), immediately contact Lucifer Tech's 24/7 Zalo support for free resolution within 24 hours.
