Grammarly vs ProWritingAid 2026: Full Comparison
Grammarly excels at real-time grammar checking and accessibility across devices with 500+ million users, while ProWritingAid offers deeper writing analysis with 20+ comprehensive reports and stronger fiction writing tools. Grammarly is faster and easier to use, but ProWritingAid provides more detailed feedback for serious writers.
Grammarly
AI-powered writing assistant with instant grammar, spelling, and tone detection across 50+ platforms.
Professionals, students, business communicators, and everyday writers who need fast, reliable grammar checking across multiple platforms without deep analysis.
ProWritingAid
Comprehensive writing analysis platform with 20+ detailed reports and specialized fiction writing tools.
Serious writers, novelists, content creators, and academic researchers who need comprehensive writing analysis, detailed feedback, and specialized tools for long-form and creative writing.
Quick Answer
AI SummaryGrammarly excels at real-time grammar checking and accessibility across devices with 500+ million users, while ProWritingAid offers deeper writing analysis with 20+ comprehensive reports and stronger fiction writing tools. Grammarly is faster and easier to use, but ProWritingAid provides more detailed feedback for serious writers.
Our Verdict
AI-assistedChoose Grammarly if you want seamless, fast grammar correction across all your devices and platforms with minimal friction—ideal for professionals, students, and casual writers who prioritize convenience and real-time feedback. Choose ProWritingAid if you're a serious writer, novelist, or content creator who needs in-depth analysis, detailed reports on style, pacing, and readability, and specialized tools for fiction writing.
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Choose Grammarly if
Best pickProfessionals, students, business communicators, and everyday writers who need fast, reliable grammar checking across multiple platforms without deep analysis.
Choose ProWritingAid if
Serious writers, novelists, content creators, and academic researchers who need comprehensive writing analysis, detailed feedback, and specialized tools for long-form and creative writing.
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Key Differences at a Glance
- Real-Time Correction Speed:✓ Grammarly wins(Instant (sub-500ms) vs On-demand (1-2 seconds))
- Writing Analysis Reports:✓ ProWritingAid wins(20+ detailed reports vs 8 core reports)
- Supported Platforms:✓ Grammarly wins(50+ integrations (web, desktop, mobile, Slack, Gmail, etc.) vs 12 integrations (web, desktop, limited mobile))
Key Facts & Figures
53 numeric metrics compared
| Metric | Grammarly | ProWritingAid | Ratio |
|---|---|---|---|
| Annual Cost (Standard Plan)(USD) | $108 (with discount) | $120 | |
| Daily Active Users(millions) | 40+ million | Under 5 million | |
| Writing Analytics Depth(score) | Basic metrics | Comprehensive reports | |
| Languages Supported(count) | Multiple with full AI | Limited options | |
| Real-Time Correction Speed(milliseconds) | Fast (<500ms) | Moderate (500-1000ms) | |
| Company Revenue (2026)(millions USD) | $700+ | Undisclosed (smaller) | |
| Annual Premium Price (USD)($) | $144 | — | — |
| Grammar Rules Coverage(rules) | 150+ | — | — |
| Paraphrase Alternatives Per Sentence(options) | 2 | — | — |
| Tone Rewriting Options(tones) | 8 | — | — |
| Plagiarism Database Coverage(billion pages) | 16 | — | — |
| Supported Languages(count) | 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 | — | — |
| Synonym Suggestions Per Word(options) | 3-4 options | — | — |
| Tone Adjustment Modes(modes) | 8 modes | — | — |
| Annual Premium Subscription Cost(USD) | $144/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(platforms) | 50+ integrations | 12 integrations | |
| Grammar Detection Accuracy(percent) | 97% | — | — |
| Monthly Premium Cost(USD) | $11.67/month (annual billing) | — | — |
| Active Users Globally(millions) | 50+ million | — | — |
| Tone Options for Rewriting(count) | 2 tones (basic free; more in premium) | — | — |
| Integrated Platform Support(integrations) | 500+ (Google Docs, Gmail, Word, Slack, LinkedIn) | — | — |
| Grammar & Spelling Error Detection(error types) | 250+ grammar, spelling, punctuation rules | — | — |
| Free Trial Duration(days) | 30 days full premium access | — | — |
| 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 | — | — |
| Annual Subscription Cost (Premium)(USD) | $144/year | — | — |
| App Integrations(count) | 500+ integrations | — | — |
| Paraphrasing Modes(modes) | 2 modes | — | — |
| App Store Rating(stars) | 4.7/5 (500K+ reviews) | — | — |
| Annual Subscription Cost(USD) | $144/year ($12/month annual plan) | — | — |
| Languages Supported(languages) | 1 (English only) | — | — |
| Plagiarism Detection Coverage(billion pages) | 16+ billion web pages indexed | — | — |
| Browser Extensions Supported(browsers) | 5 (Chrome, Safari, Edge, Firefox, Opera) | — | — |
| Third-Party App Integrations(integrations) | 500+ integrations (Slack, Office, Gmail, LinkedIn) | — | — |
| Tone Detection Options(tones) | 100+ writing tones (formal, friendly, confident, etc.) | — | — |
| Real-Time Grammar Checking(milliseconds) | ~400ms | ~1500ms | |
| Writing Analysis Reports(reports) | 8 core reports | 20+ reports | |
| Premium Monthly Price (Billed Annually)(USD/month) | $12/month | $10/month | |
| Plagiarism Detection Web Pages Checked(billions) | 16 billion pages | Database size not disclosed | — |
| Active Users(millions) | 500+ million | 1+ million | |
| Grammar Rules Checked (Free Version)(rules) | 100+ rules | 40 rules |
Sourced from publicly available data ·
Key Differences
7 attributes compared head-to-head
- Instant (sub-500ms)(winner)Real-Time Correction SpeedOn-demand (1-2 seconds)
- 8 core reportsWriting Analysis Reports20+ detailed reports(winner)
- 50+ integrations (web, desktop, mobile, Slack, Gmail, etc.)(winner)Supported Platforms12 integrations (web, desktop, limited mobile)
- Basic tone detectionFiction Writing ToolsDedicated fiction modes, character development tracking, dialogue analysis(winner)
- $12/month (billed annually)Pricing (Monthly Premium)$10/month (billed annually)(winner)
- Included in Premium (checks against 16 billion web pages)(winner)Plagiarism DetectionAvailable in premium add-on (+$60/year)
- 500+ million users(winner)Active User Base1 million+ users
- Real-Time Correction Speed
Grammarly
Instant (sub-500ms)(winner)
ProWritingAid
On-demand (1-2 seconds)
- Writing Analysis Reports
Grammarly
8 core reports
ProWritingAid
20+ detailed reports(winner)
- Supported Platforms
Grammarly
50+ integrations (web, desktop, mobile, Slack, Gmail, etc.)(winner)
ProWritingAid
12 integrations (web, desktop, limited mobile)
- Fiction Writing Tools
Grammarly
Basic tone detection
ProWritingAid
Dedicated fiction modes, character development tracking, dialogue analysis(winner)
- Pricing (Monthly Premium)
Grammarly
$12/month (billed annually)
ProWritingAid
$10/month (billed annually)(winner)
- Plagiarism Detection
Grammarly
Included in Premium (checks against 16 billion web pages)(winner)
ProWritingAid
Available in premium add-on (+$60/year)
- Active User Base
Grammarly
500+ million users(winner)
ProWritingAid
1 million+ users
Full Comparison
| Attribute | Grammarly | ProWritingAid |
|---|---|---|
| Annual Cost (Standard Plan)(USD) | $108 (with discount)(winner) | $120 |
| Annual Premium Price (USD)($) | $144 | — |
| Free Tier Access | Limited (basic checks only) | — |
| Monthly Subscription Cost(USD) | $12/month (annual) | — |
| Free Tier Capability | Basic grammar and spell check only | — |
Show 10 more attributesAnnual Premium Subscription Cost(USD) $144/year — Monthly Subscription Cost (Premium/Pro Tier)(USD) $12.00/month — Annual Subscription Cost (Premium/Pro Tier)(USD) $144.00/year — Monthly Premium Cost(USD) $11.67/month (annual billing) — Monthly Cost (Premium)(USD) $12/month — Annual Cost (Premium)(USD) $144/year — Annual Subscription Cost (Premium)(USD) $144/year — Annual Subscription Cost(USD) $144/year ($12/month annual plan) — Free Tier Availability Limited (basic grammar only, heavily restricted) — Premium Monthly Price (Billed Annually)(USD/month) $12/month $10/month | ||
| Daily Active Users(millions) | 40+ million(winner) | Under 5 million |
| Active Users Globally(millions) | 50+ million | — |
| Active Users(millions) | 500+ million(winner) | 1+ million |
| Plagiarism Detection Quality | Advanced AI detector included | Standard detection |
| Writing Analytics Depth(score) | Basic metrics | Comprehensive reports(winner) |
| Grammar Rules Coverage(rules) | 150+ | — |
| Paraphrase Alternatives Per Sentence(options) | 2 | — |
| Plagiarism Detection Available | Yes (Premium) | — |
Show 18 more attributesTone Rewriting Options(tones) 8 — Rewrite Variations Per Suggestion(count) 50+ (with GrammarlyGO) — Free Daily Rewrite Limit(rewrites/day) Unlimited suggestions — Tone Options for Rewriting(count) 2 tones (basic free; more in premium) — Grammar Rules Covered(rules) 400+ rules — Tone/Style Detection(styles) 100+ writing styles — App Integrations(count) 500+ integrations — Paraphrasing Modes(modes) 2 modes — Plagiarism Detection(available) Yes (Premium only) — Free Plan Grammar Checks(available) Yes — AI Content Generation (Co-Author/GrammarlyGO)(included) Separate subscription ($30/month) — Languages Supported(languages) 1 (English only) — Plagiarism Detection Coverage(billion pages) 16+ billion web pages indexed — Tone Detection Options(tones) 100+ writing tones (formal, friendly, confident, etc.) — Writing Analysis Reports(reports) 8 core reports 20+ reports Plagiarism Detection Web Pages Checked(billions) 16 billion pages Database size not disclosed Grammar Rules Checked (Free Version)(rules) 100+ rules 40 rules Fiction/Creative Writing Specialization(null) Basic tone detection Dedicated fiction mode with dialogue analysis | ||
| Languages Supported(count) | Multiple with full AI(winner) | Limited options |
| Real-Time Correction Speed(milliseconds) | Fast (<500ms)(winner) | Moderate (500-1000ms) |
| Real-Time Grammar Checking(milliseconds) | ~400ms(winner) | ~1500ms |
| Ideal for Manuscript Editing | Good for quick reviews | Excellent for deep editing |
| Company Revenue (2026)(millions USD) | $700+(winner) | Undisclosed (smaller) |
| Daily Free Rewrites (Free Plan)(rewrites) | Unlimited (basic) | — |
| Plagiarism Database Coverage(billion pages) | 16 | — |
| Tone Detection Accuracy(percent) | 95% | — |
| Supported Languages(count) | English (4 dialects) | — |
| Open Source | No (proprietary closed-source) | — |
| Integrated App Support(number of apps) | 150+ apps (Gmail, Office, Slack, etc.) | — |
| Real-time Browser Integration(boolean) | Yes (500+ apps) | — |
| Browser Extensions Supported(browsers) | 5 (Chrome, Safari, Edge, Firefox, Opera) | — |
| Context Window Size(tokens) | Not applicable | — |
| Real-Time Integration | Yes—instant feedback while typing | — |
| Browser & Platform Integrations(platforms) | 500+ integrations | — |
| Synonym Suggestions Per Word(options) | 3-4 options | — |
| Free Plan Monthly Paraphrases(requests/month) | Unlimited (limited features) | — |
| Tone Adjustment Modes(modes) | 8 modes | — |
| Context Window (Max Input Length)(tokens) | Single document | — |
| Content Generation Capability(max words per output) | Limited (rewrites only) | — |
| Platform Integrations(platforms) | 50+ integrations(winner) | 12 integrations |
| Integrated Platform Support(integrations) | 500+ (Google Docs, Gmail, Word, Slack, LinkedIn) | — |
| Platform Integration(platforms) | 500,000+ websites/apps | — |
| Grammar Detection Accuracy(percent) | 97% | — |
| Grammar & Spelling Error Detection(error types) | 250+ grammar, spelling, punctuation rules | — |
| Free Trial Duration(days) | 30 days full premium access | — |
| User Rating (Capterra 2025)(stars) | 4.7/5 | — |
| Learning Curve Complexity(1-5 scale) | 3/5 (moderate) | — |
| Monthly Active Users(millions) | 90M+ users | — |
| App Store Rating(stars) | 4.7/5 (500K+ reviews) | — |
| Third-Party App Integrations(integrations) | 500+ integrations (Slack, Office, Gmail, LinkedIn) | — |
Show 10 more attributes
Show 18 more attributes
Pros & Cons
10 pros·7 cons across both
Grammarly
Pros
- Instant real-time corrections (sub-500ms latency)
- Integrates with 50+ platforms (Gmail, Slack, Microsoft Office, Google Docs, LinkedIn, Twitter, etc.)
- Mobile app with full functionality on iOS and Android
- Tone detector identifies confidence, formality, and emotion in writing
- Free version covers 100+ grammar rules and common errors
Cons
- Limited advanced writing analysis—only 8 core reports vs competitors' 20+
- Less effective for fiction and creative writing compared to specialized tools
- Premium subscription required for plagiarism detection and tone suggestions
ProWritingAid
Pros
- 20+ detailed writing reports (style, grammar, plagiarism, readability, pacing, dialogue, etc.)
- Specialized fiction and creative writing modes with character development tracking
- Heat map visualization shows problem areas in documents
- Integrates with Scrivener (industry standard for novelists)
- Lower premium price ($10/month billed annually) with plagiarism included
Cons
- Slower feedback—requires on-demand checking (1-2 seconds per analysis)
- Limited platform integrations (12 vs Grammarly's 50+)
- No real-time correction like Grammarly—requires manual checks and rewrites
- Mobile app is less robust than desktop version
Frequently Asked Questions
5 questions
ProWritingAid is significantly better for fiction writers. It includes a dedicated fiction mode, character development tracking, dialogue analysis, and integrations with Scrivener (the industry standard for novelists). Grammarly lacks these specialized creative writing tools and is better suited for professional and business writing.
Resources & Learn More
Curated sources to dive deeper
Where to Buy
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Wikipedia
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