Grammarly vs QuillBot: Grammar, Paraphrasing & Pricing
Grammarly vs QuillBot comes down to one core difference: Grammarly is an all-in-one writing assistant built around grammar, clarity, and tone, while QuillBot is a paraphrasing-first suite built around rewording and reworking existing text. This AI Comparison guide tests both tools on accuracy, features, plagiarism checks, integrations, and 2026 pricing so you can decide in minutes.
Both tools run on a free plan and a single paid tier, both work in a browser and in Microsoft Word, and both now bundle an AI detector and an AI humanizer. The right pick depends on whether you mostly write from scratch or mostly rewrite sources.
Grammarly vs QuillBot at a Glance
Grammarly wins on grammar, clarity, and team features; QuillBot wins on paraphrasing depth, price, and academic tooling. The table below summarizes the practical differences.
| Dimension | Grammarly | QuillBot |
|---|---|---|
| Primary strength | Grammar, clarity, tone, full-sentence rewrites | Paraphrasing and rewording across multiple modes |
| Grammar checker | Context-aware, sentence-level suggestions | Reliable word-level and punctuation corrections |
| Paraphrasing | Basic rewrite plus tone adjustment | Up to 9 modes: Standard, Fluency, Formal, Academic, Simple, Creative, Shorten, Expand, Custom |
| Plagiarism checker | Unlimited scans on the paid plan | About 20 pages per month on Premium |
| Extra tools | Generative AI prompts, tone detection, citation help, AI detector | Summarizer, translator for 50+ languages, citation generator, AI detector, Flow workspace |
| Integrations | Browser, Windows, macOS, MS Word, iOS and Android keyboards | Browser, macOS, MS Word, Chrome extension; limited mobile |
| Free plan | Basic checks plus about 100 AI prompts per month | Paraphraser with 2 modes and a 125-word limit, plus grammar checks |
| Entry paid price (2026) | $12 per member per month, billed annually | About $8.33 per month, billed annually ($99.95 per year) |
| Best for | Professionals, teams, and polished original writing | Students, researchers, and ESL writers who rework sources |
What Is Grammarly?
Grammarly is a writing assistant that checks grammar, spelling, punctuation, clarity, and tone across the apps where you already write. It launched in 2009 and now serves millions of individuals, teams, and enterprises.
The core engine flags errors and rewrites weak sentences in real time, with explanations for each suggestion. Paid plans add full-sentence rewrites, tone adjustments, an unlimited plagiarism checker, and generative AI prompts for drafting, replying, and summarizing.
In 2025 Grammarly acquired the document tool Coda and the email client Superhuman, and in 2026 it folded its Premium and Business plans into one Pro plan. The company is positioning the product as a broader work assistant, but grammar and clarity remain its center of gravity.
What Is QuillBot?
QuillBot is a writing suite centered on a paraphrasing tool that rewrites text in multiple styles. It launched in the late 2010s and is now owned by Learneo, the parent company of Course Hero.
The paraphraser is the flagship feature, offering modes such as Standard, Fluency, Formal, Academic, Creative, Shorten, and Expand, plus a synonym slider that controls how aggressively it rewrites. Around that sit a grammar checker, a summarizer, a translator for more than 50 languages, a citation generator, an AI detector, an AI humanizer, and a plagiarism checker.
QuillBot Flow, added recently, is a distraction-free editor where all of those tools live in one workspace. The free plan is generous for light use, which is why the tool is popular with students.
Feature Comparison: Grammar, Paraphrasing, and Plagiarism
Grammarly leads on grammar and clarity, QuillBot leads on paraphrasing, and they split the plagiarism category on volume versus accuracy. Each subsection below breaks down one area.
Grammar and Spelling Checker
Grammarly catches contextual and stylistic issues that QuillBot often misses, while QuillBot is strong on discrete word-level errors. Grammarly reads the whole sentence, so it flags wordiness, passive voice, unclear antecedents, and tone mismatches.
Independent 2026 comparisons report mixed raw error counts, with QuillBot catching more isolated mistakes in some test samples and Grammarly producing more useful clarity and structure suggestions. For most writers, Grammarly’s explanations and rewrite options make edits faster to act on.
Paraphrasing and Rewriting
QuillBot is the stronger paraphrasing tool by a wide margin. Its multiple modes and synonym slider give precise control over how much the output changes, and the Academic and Formal modes suit research and business writing.
Grammarly can rewrite a sentence for clarity or shift its tone, but it offers one rewrite style rather than a menu. If rewording sources or tightening drafts is your main task, QuillBot does it with less friction.
Plagiarism Detection
Grammarly offers unlimited plagiarism scans on its paid plan, while QuillBot Premium caps checks at roughly 20 pages per month. Both compare text against web pages and academic databases and return a similarity percentage with source links.
Grammarly suits writers who scan long documents often, such as content teams and graduate students. QuillBot’s limit is workable for occasional essay checks but frustrating for heavy use.
AI Writing and Extra Tools
QuillBot bundles more standalone utilities, while Grammarly’s generative AI is more integrated into the editing flow. QuillBot adds a summarizer, a 50-language translator, and a citation generator that supports thousands of styles.
Grammarly’s AI prompts draft replies, outlines, and short passages inside the same interface you edit in, capped by a monthly prompt allowance. Both now include an AI detector and an AI humanizer, though neither detector is reliable enough to depend on.
Performance Comparison: Accuracy in Real Use
In everyday writing, Grammarly produces cleaner final drafts and QuillBot produces faster rewrites. Grammarly’s suggestions require less manual cleanup because they account for sentence context and tone.
QuillBot’s paraphraser occasionally introduces awkward phrasing on the more aggressive modes, so outputs need a proofread. Its grammar checker is accurate on mechanics but rarely comments on style. Response speed is comparable, and both tools work offline-free only through their web editors.
Teams comparing broader content platforms often weigh options in our Best AI Writing Tools roundup before committing to either.
Pricing: Grammarly vs QuillBot in 2026
QuillBot is the cheaper paid tool, and its free plan is more useful than Grammarly’s free plan. List pricing is below; promotional discounts frequently apply, especially on QuillBot’s annual plan.
Grammarly Pricing
Grammarly Free costs $0, and Grammarly Pro costs $12 per member per month on annual billing or $30 month to month. Free includes basic grammar and spelling checks plus about 100 AI prompts per month.
Pro adds full-sentence rewrites, tone and clarity suggestions, the unlimited plagiarism checker, style guides, brand tones for teams, and roughly 2,000 AI prompts per month. Enterprise pricing is custom and removes the AI usage cap.
QuillBot Pricing
QuillBot Premium costs $19.95 month to month, about $13.31 per month billed quarterly, or about $8.33 per month billed annually at $99.95 per year. The free plan includes the paraphraser with 2 modes and a 125-word input limit, plus grammar checking and short summaries.
Premium unlocks unlimited paraphrasing, all rewriting modes, the plagiarism checker, faster processing, and higher word limits across every tool. There is one paid tier rather than a ladder of plans.
Pros and Cons
Grammarly’s tradeoff is price for polish; QuillBot’s tradeoff is manual cleanup for flexibility and cost. The lists below cover the main points from hands-on use and user reviews.
Grammarly Pros and Cons
Grammarly’s strengths are contextual accuracy, integrations, and team controls; its weaknesses are cost and a weaker paraphraser. These are the 5 recurring points, 3 pros and 2 cons:
- Pro: context-aware grammar, clarity, and tone suggestions with clear explanations
- Pro: works in roughly 500,000 apps and sites, plus dedicated iOS and Android keyboards
- Pro: unlimited plagiarism scans and team style guides on the paid plan
- Con: Pro is more expensive than QuillBot Premium
- Con: only one rewrite style, with no mode selection
QuillBot Pros and Cons
QuillBot’s strengths are paraphrasing control, price, and academic tools; its weaknesses are style feedback and the plagiarism cap. These are the 5 recurring points, 3 pros and 2 cons:
- Pro: up to 9 paraphrasing modes with a synonym-strength slider
- Pro: generous free plan and low annual price
- Pro: built-in summarizer, translator, and citation generator for research work
- Con: limited style, tone, and clarity feedback
- Con: plagiarism checks capped at about 20 pages per month
User Reviews and Community Feedback
Reviewers consistently split along the same line: professionals and teams favor Grammarly, while students and ESL writers favor QuillBot. On G2 and Trustpilot, Grammarly scores higher on overall satisfaction and tone control for business communication.
Discussions on Reddit and Quora frequently recommend running both free plans together, using Grammarly to edit and QuillBot to reword. A common academic concern raised in those threads is whether paraphrased text still triggers similarity or AI flags in tools like Turnitin, which it increasingly can. ESL users in particular praise QuillBot’s Fluency mode for making non-native drafts read naturally.
Writers who want a single all-purpose subscription often compare these tools against the picks in our Best AI Productivity Tools guide.
Use Cases: Which Tool Fits Your Workflow
Match the tool to your dominant task: original writing points to Grammarly, source rewriting points to QuillBot. These are the 5 most common scenarios:
- Business and marketing writing: Grammarly, for tone consistency and team brand voices
- Academic essays and literature reviews: QuillBot, for Academic mode plus citations and summaries
- Non-native English drafting: QuillBot Fluency mode, with Grammarly as a second pass
- Long-document editing with plagiarism checks: Grammarly Pro, for unlimited scans
- Newsletters, email, and social posts: Grammarly, through its browser and keyboard integrations
Final Recommendation
Choose Grammarly if you write mostly original content and need polish; choose QuillBot if you rework existing text and want value.
Choose Grammarly if these 4 statements fit you:
- You write business, marketing, or professional communication daily
- You need tone control, brand voice, or team style guides
- You scan long documents for plagiarism regularly
- You want corrections inside every app through one extension
Choose QuillBot if these 4 statements fit you:
- Paraphrasing and summarizing sources is your main task
- You are a student, researcher, or ESL writer on a budget
- You want built-in citations and a multi-language translator
- The free plan already covers most of your needs
Alternatives to Grammarly and QuillBot
Several tools overlap with one or both, depending on whether you want editing, rewriting, or full drafting. Consider these 5 alternatives:
- Wordtune: rewriting and tone shifts with a cleaner interface than QuillBot
- ProWritingAid: deep style and readability reports for fiction and long-form writing
- LanguageTool: open-source grammar checking with strong multilingual support
- Jasper: full content generation for marketing teams, covered in Jasper vs Copy AI
- ChatGPT: flexible drafting and rewriting, compared in Jasper AI vs ChatGPT
If you are leaving Grammarly specifically, our Jasper AI Alternatives list also covers writing tools with built-in editing.
FAQ
Is QuillBot better than Grammarly?
Neither is better overall; they solve different problems. QuillBot is better for paraphrasing, summarizing, and academic work on a budget. Grammarly is better for grammar, clarity, tone, and professional or team writing.
Can I use Grammarly and QuillBot together?
Yes, and many writers do. The free plans coexist without conflict. A common setup is drafting and rewording in QuillBot, then running the final text through Grammarly for grammar and tone.
Does Grammarly detect QuillBot paraphrasing?
Grammarly’s plagiarism checker does not specifically flag QuillBot output, but it can still detect matching source text. Grammarly and QuillBot both now include AI detectors, and academic tools such as Turnitin have improved at catching paraphrased and AI-assisted writing.
Is QuillBot safe for academic writing?
QuillBot is safe when used to improve your own writing, not to disguise copied text. Its Academic mode, citation generator, and summarizer support legitimate research work. Check your institution’s policy on paraphrasing tools before relying on it.
Which tool is better for ESL writers?
QuillBot is usually the better first choice for ESL writers. The Fluency mode rewrites non-native phrasing into natural English, and the free plan is enough for regular use. Grammarly adds value as a second pass for tone and punctuation.
Final Verdict
Grammarly vs QuillBot is a choice between a polishing tool and a rewriting tool, and most writers get the best result from both. Grammarly delivers cleaner original drafts, stronger tone control, and unlimited plagiarism scans, which is why professionals and teams pick it despite the higher $12 per month price.
QuillBot delivers deeper paraphrasing, a translator, citations, and a genuinely useful free plan for roughly $8.33 per month on annual billing, which is why students, researchers, and ESL writers pick it. If you must choose one, base it on whether your day is spent writing new text or reworking existing text.
