Grammarly vs ProWritingAid: Which Writing Tool Is Better?
A practical comparison of Grammarly and ProWritingAid for grammar checking, proofreading, long-form editing, academic writing, business communication, writing reports, AI features, and value for money.
Best all-round free writing assistant with a strong paid upgrade
Anyone who wants free spelling, grammar and tone checking with an optional upgrade for deeper rewrites
4.5/5 Tool Verdict ratingBest deep-editing tool for long-form writers and authors
Novelists, bloggers and professional writers who want detailed style and structure reports, not just grammar fixes
4.3/5 Tool Verdict ratingBest for
Grammarly
Anyone who wants free spelling, grammar and tone checking with an optional upgrade for deeper rewrites
ProWritingAid
Novelists, bloggers and professional writers who want detailed style and structure reports, not just grammar fixes
Verdict
Grammarly
Best all-round free writing assistant with a strong paid upgrade
ProWritingAid
Best deep-editing tool for long-form writers and authors
Tool Verdict rating
Grammarly
4.5/5
ProWritingAid
4.3/5
Pricing tiers
Grammarly
Spelling, grammar, basic tone detection, up to 100 AI prompts/month.
Full-sentence and tone rewrites, plagiarism/AI detection, up to 2,000 AI prompts/month.
SSO, security review and centralised admin.
ProWritingAid
500-word check limit, 2 report runs/day.
Unlimited word counts and report runs.
Same Premium features at the lowest ongoing rate.
Higher Sparks/Chapter Critique limits and community features.
Same Premium Pro features at the lowest ongoing rate.
Permanent Premium access.
Free plan
Grammarly
Yes — Free covers spelling, grammar, basic tone detection and up to 100 AI prompts/month, no card required.
ProWritingAid
Yes — Free allows checks up to 500 words with 2 report runs per day.
Platforms
Grammarly
Web, Windows, macOS, iOS, Android, Chrome, Safari, Firefox, Edge, Microsoft Word, Google Docs
ProWritingAid
Web, Windows, macOS, Chrome, Edge, Firefox, Safari, Microsoft Word, Google Docs, Scrivener
Main strengths
Grammarly
Best for Editing; Writers and professionals
ProWritingAid
Best for Long-Form Editing; Authors and long-form writers
Watch-outs
Grammarly
Check current plan limits, usage caps, export rules, privacy settings, and whether the tool fits your exact workflow before committing.
ProWritingAid
Check current plan limits, usage caps, export rules, privacy settings, and whether the tool fits your exact workflow before committing.
Integrations
Grammarly
Browser, web, desktop, mobile
ProWritingAid
Web, desktop, browser
Summary
Grammarly
Grammarly is a free-to-start writing assistant covering spelling, grammar and basic tone, with a Pro tier from $12/month (billed annually) adding full-sentence rewrites, plagiarism/AI detection and a much larger AI prompt allowance.
ProWritingAid
ProWritingAid is a deep writing-analysis tool aimed at authors and professionals, free with a 500-word check limit, with Premium restructured in 2026 to $10/month billed annually and a Premium Pro tier adding Sparks and Chapter Critique features.
Best overall choice
Grammarly
Better for most users who want fast grammar checks, clarity suggestions, tone support, rewrites, and an easy writing assistant across emails, documents, browsers, and everyday writing.
ProWritingAid
Better for writers who want deeper editing reports, long-form writing feedback, readability analysis, style improvements, and more detailed control over revisions.
Best for students
Grammarly
Better for students who want quick grammar, spelling, clarity, tone, plagiarism, and AI detection support before submitting essays or coursework.
ProWritingAid
Better for students working on longer essays, dissertations, creative writing, or academic drafts where deeper structure, readability, and style feedback matter.
Best for professionals
Grammarly
Better for professionals who write emails, reports, applications, proposals, documents, and client-facing communication and want fast polish with minimal setup.
ProWritingAid
Better for professionals who produce longer documents, reports, articles, white papers, or detailed written work that benefits from more analysis.
Best for long-form writing
Grammarly
Useful for improving clarity, tone, grammar, and sentence quality, but less detailed than ProWritingAid for full-document analysis.
ProWritingAid
Stronger for long-form writing because it offers more detailed reports, readability checks, style analysis, pacing feedback, and revision depth.
Best for quick proofreading
Grammarly
Better for fast, simple, everyday proofreading because it is easier to use and works smoothly across common writing surfaces.
ProWritingAid
Good for proofreading, but more useful when you are willing to spend longer reviewing detailed suggestions and reports.
Which one should you choose?
Choose Grammarly if you want the easier everyday writing assistant. It is better for quick proofreading, emails, essays, business documents, browser writing, tone checks, rewrites, and general writing confidence.
Choose ProWritingAid if you want deeper editing feedback. It is better for authors, bloggers, long-form writers, students working on large assignments, and anyone who wants detailed reports rather than quick corrections.
For most everyday users, Grammarly is the simpler recommendation. For serious long-form writers who are willing to spend more time editing, ProWritingAid is the better specialist tool.