Grammarly vs Quillbot 2026: Which Wins?
Grammarly excels at grammar checking and real-time writing feedback across 500+ integrations, while Quillbot specializes in paraphrasing and rewriting with more advanced synonym replacement options. Grammarly is better for general writing quality, while Quillbot is better for content rephrasing and plagiarism avoidance.
Grammarly
AI-powered writing assistant with 400+ grammar rules, plagiarism detection, and tone analysis.
Professionals, students, and content creators who need comprehensive grammar checking across multiple platforms and real-time writing feedback for emails, documents, and social posts.
Quillbot
AI paraphrasing tool and rewriter that offers advanced synonym replacement and plagiarism detection.
Content writers, students, and marketers who frequently rephrase content, need plagiarism checking, and want more control over word choice and synonym alternatives.
Quick Answer
AI SummaryGrammarly excels at grammar checking and real-time writing feedback across 500+ integrations, while Quillbot specializes in paraphrasing and rewriting with more advanced synonym replacement options. Grammarly is better for general writing quality, while Quillbot is better for content rephrasing and plagiarism avoidance.
Our Verdict
AI-assistedChoose Grammarly if you need comprehensive grammar checking, real-time corrections across hundreds of platforms, and professional writing oversight for emails, documents, and social media. Choose Quillbot if your primary goal is paraphrasing, rewriting content, avoiding plagiarism, and you want more synonym options with lower pricing.
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TIE — neck and neck
Choose Grammarly if
Professionals, students, and content creators who need comprehensive grammar checking across multiple platforms and real-time writing feedback for emails, documents, and social posts.
Choose Quillbot if
Content writers, students, and marketers who frequently rephrase content, need plagiarism checking, and want more control over word choice and synonym alternatives.
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Key Differences at a Glance
- Primary Strength:Grammar & style checking vs Paraphrasing & rewriting
- Browser Extensions:✓ Grammarly wins(500+ integrations (Gmail, Google Docs, LinkedIn, etc.) vs 50+ integrations (more limited))
- Synonym/Word Choice Options:✓ Quillbot wins(8-10+ customizable alternatives per word vs Limited to 3-4 suggestions per word)
Key Facts & Figures
33 numeric metrics compared
| Metric | Grammarly | Quillbot | Ratio |
|---|---|---|---|
| Annual Cost (Standard Plan)(USD) | $108 (with discount) | — | — |
| Daily Active Users(millions) | 40+ million | — | — |
| Writing Analytics Depth(score) | Basic metrics | — | — |
| Languages Supported(count) | Multiple with full AI | — | — |
| Real-Time Correction Speed(milliseconds) | Fast (<500ms) | — | — |
| Company Revenue (2026)(millions USD) | $700+ | — | — |
| Annual Premium Price (USD)($) | $144 | — | — |
| Grammar Rules Coverage(rules) | 150+ | — | — |
| Paraphrase Alternatives Per Sentence(options) | 2 | — | — |
| Tone Rewriting Options(tones) | 8 | — | — |
| Plagiarism Database Coverage(billion pages) | 16 | — | — |
| Monthly Premium Cost(USD) | $12.00 | — | — |
| Supported Languages(languages) | English (4 dialects) | — | — |
| Tone Detection Accuracy(percent) | 95% | — | — |
| Rewrite Variations Per Suggestion(count) | 50+ (with GrammarlyGO) | — | — |
| Monthly Subscription Cost(USD) | $12/month (annual) | — | — |
| Integrated App Support(number of apps) | 150+ apps (Gmail, Office, Slack, etc.) | — | — |
| Browser & Platform Integrations(platforms) | 500+ integrations | 50+ integrations | |
| Synonym Suggestions Per Word(options) | 3-4 options | 8-10+ options | |
| Free Plan Monthly Paraphrases(requests/month) | Unlimited (limited features) | 125 paraphrases | — |
| Tone Adjustment Modes(modes) | 8 modes | 6 modes | |
| Annual Premium Subscription Cost(USD) | $144/year | $99.90/year | |
| Monthly Subscription Cost (Premium/Pro Tier)(USD) | $12.00/month | — | — |
| Annual Subscription Cost (Premium/Pro Tier)(USD) | $144.00/year | — | — |
| Context Window (Max Input Length)(tokens) | Single document | — | — |
| Platform Integrations(count) | 500+ integrations | — | — |
| Grammar Detection Accuracy(percent) | 97% | — | — |
| Monthly Cost (Premium)(USD) | $12/month | — | — |
| Annual Cost (Premium)(USD) | $144/year | — | — |
| Grammar Rules Covered(rules) | 400+ rules | — | — |
| Platform Integration(platforms) | 500,000+ websites/apps | — | — |
| Tone/Style Detection(styles) | 100+ writing styles | — | — |
| User Rating (Capterra 2025)(stars) | 4.7/5 | — | — |
Sourced from publicly available data ·
Key Differences
7 attributes compared head-to-head
- Grammar & style checkingPrimary StrengthParaphrasing & rewriting
- 500+ integrations (Gmail, Google Docs, LinkedIn, etc.)(winner)Browser Extensions50+ integrations (more limited)
- Limited to 3-4 suggestions per wordSynonym/Word Choice Options8-10+ customizable alternatives per word(winner)
- Unlimited checks (all features limited)(winner)Free Plan Word Limit125 paraphrases/month limit
- Requires separate tool or PremiumPlagiarism DetectionBuilt-in with free plan(winner)
- 8 tone modes (formal, friendly, confident, etc.)(winner)AI Tone Adjustment6 tone modes
- $12/month ($144/year)Premium Price (Annual)$9.99/month ($99.90/year)(winner)
- Primary Strength
Grammarly
Grammar & style checking
Quillbot
Paraphrasing & rewriting
- Browser Extensions
Grammarly
500+ integrations (Gmail, Google Docs, LinkedIn, etc.)(winner)
Quillbot
50+ integrations (more limited)
- Synonym/Word Choice Options
Grammarly
Limited to 3-4 suggestions per word
Quillbot
8-10+ customizable alternatives per word(winner)
- Free Plan Word Limit
Grammarly
Unlimited checks (all features limited)(winner)
Quillbot
125 paraphrases/month limit
- Plagiarism Detection
Grammarly
Requires separate tool or Premium
Quillbot
Built-in with free plan(winner)
- AI Tone Adjustment
Grammarly
8 tone modes (formal, friendly, confident, etc.)(winner)
Quillbot
6 tone modes
- Premium Price (Annual)
Grammarly
$12/month ($144/year)
Quillbot
$9.99/month ($99.90/year)(winner)
Full Comparison
| Attribute | Grammarly | Quillbot |
|---|---|---|
| Annual Cost (Standard Plan)(USD) | $108 (with discount) | — |
| Annual Premium Price (USD)($) | $144 | — |
| Monthly Premium Cost(USD) | $12.00 | — |
| Free Tier Access | Limited (basic checks only) | — |
| Monthly Subscription Cost(USD) | $12/month (annual) | — |
Show 7 more attributesFree Tier Capability Basic grammar and spell check only — Annual Premium Subscription Cost(USD) $144/year $99.90/year Monthly Subscription Cost (Premium/Pro Tier)(USD) $12.00/month — Annual Subscription Cost (Premium/Pro Tier)(USD) $144.00/year — Free Tier Availability Yes (basic corrections only) — Monthly Cost (Premium)(USD) $12/month — Annual Cost (Premium)(USD) $144/year — | ||
| Daily Active Users(millions) | 40+ million | — |
| Plagiarism Detection Quality | Advanced AI detector included | — |
| Writing Analytics Depth(score) | Basic metrics | — |
| Grammar Rules Coverage(rules) | 150+ | — |
| Paraphrase Alternatives Per Sentence(options) | 2 | — |
| Plagiarism Detection Available | Yes (Premium) | — |
Show 7 more attributesTone Rewriting Options(tones) 8 — Supported Languages(languages) English (4 dialects) — Rewrite Variations Per Suggestion(count) 50+ (with GrammarlyGO) — Plagiarism Detection Yes, Premium feature — Platform Integrations(count) 500+ integrations — Grammar Rules Covered(rules) 400+ rules — Tone/Style Detection(styles) 100+ writing styles — | ||
| Languages Supported(count) | Multiple with full AI | — |
| Real-Time Correction Speed(milliseconds) | Fast (<500ms) | — |
| Context Window Size(tokens) | Not applicable | — |
| Ideal for Manuscript Editing | Good for quick reviews | — |
| Company Revenue (2026)(millions USD) | $700+ | — |
| Daily Free Rewrites (Free Plan)(rewrites) | Unlimited (basic) | — |
| Plagiarism Database Coverage(billion pages) | 16 | — |
| Tone Detection Accuracy(percent) | 95% | — |
| Open Source | No (proprietary) | — |
| Integrated App Support(number of apps) | 150+ apps (Gmail, Office, Slack, etc.) | — |
| Real-time Browser Integration(boolean) | Yes (500+ apps) | — |
| Real-Time Integration | Yes—instant feedback while typing | — |
| Browser & Platform Integrations(platforms) | 500+ integrations(winner) | 50+ integrations |
| Synonym Suggestions Per Word(options) | 3-4 options | 8-10+ options(winner) |
| Free Plan Monthly Paraphrases(requests/month) | Unlimited (limited features) | 125 paraphrases |
| Tone Adjustment Modes(modes) | 8 modes(winner) | 6 modes |
| Context Window (Max Input Length)(tokens) | Single document | — |
| Content Generation Capability(max words per output) | Limited (rewrites only) | — |
| Grammar Detection Accuracy(percent) | 97% | — |
| Platform Integration(platforms) | 500,000+ websites/apps | — |
| User Rating (Capterra 2025)(stars) | 4.7/5 | — |
| Learning Curve Complexity(1-5 scale) | 3/5 (moderate) | — |
Show 7 more attributes
Show 7 more attributes
Pros & Cons
10 pros·6 cons across both
Grammarly
Pros
- 500+ platform integrations (Gmail, Google Docs, LinkedIn, Twitter, Slack, etc.) for seamless writing assistance
- Real-time grammar, spelling, and punctuation corrections across all platforms
- 8 tone adjustment modes (formal, friendly, confident, diplomatic, etc.) for professional communication
- Advanced plagiarism detection in Premium plan
- Citation suggestions for academic writing
Cons
- Paraphrasing options are limited compared to Quillbot (only 3-4 alternatives)
- Premium pricing at $12/month is 20% higher than Quillbot
- Free plan has limited features (only basic grammar, no tone adjustment)
Quillbot
Pros
- 8-10+ customizable synonym alternatives per word for flexible paraphrasing
- Built-in plagiarism checker included in free plan
- Grammar checker included (identifies 150+ grammar rules)
- Lower pricing at $9.99/month ($99.90/year) - 17% cheaper than Grammarly
- 6 rewriting modes (Standard, Fluency, Formal, Simple, Creative, Expand)
Cons
- Free plan limited to 125 paraphrases per month (requires Premium for unlimited)
- Only 50+ integrations (significantly fewer than Grammarly's 500+)
- Less effective at real-time writing correction in browsers compared to Grammarly
Frequently Asked Questions
5 questions
Quillbot has a built-in plagiarism detector included in its free plan, making it immediately accessible. Grammarly offers plagiarism detection only in its Premium plan ($12/month). For students and content creators focused on plagiarism checking, Quillbot is more cost-effective since you get this feature for free.
Resources & Learn More
Curated sources to dive deeper
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