Grammarly Premium
AI Writing
4.5
Best for ProfessionalsVS
ProWritingAid
AI Writing
4.2
Best Value for WritersGrammarly Premium wins 6 out of 8 categories we compared.
Data sources:Grammarly OfficialWikipedia APIApp StoreApp TestingProWritingAid OfficialG2 Reviews
Score Comparison
Multi-Factor Scores
Grammarly PremiumProWritingAid
Overall ScoreGrammarly Premium wins
Grammarly Premium9.0
ProWritingAid8.4
Ease of UseGrammarly Premium wins
Grammarly Premium9.7
ProWritingAid8.2
SpeedGrammarly Premium wins
Grammarly Premium9.0
ProWritingAid8.0
PrivacyProWritingAid wins
Grammarly Premium8.5
ProWritingAid8.8
ValueProWritingAid wins
Grammarly Premium8.6
ProWritingAid9.2
FeaturesGrammarly Premium wins
Grammarly Premium9.2
ProWritingAid9.0
AI QualityGrammarly Premium wins
Grammarly Premium9.1
ProWritingAid8.5
MobileGrammarly Premium wins
Grammarly Premium8.8
ProWritingAid7.5
Pricing
Cost Comparison
Grammarly Premium
Free planStarting price£0 (Free) / ~£12/mo (Premium)
Top plan~£15/user/mo (Business)
NoteBilled annually
ProWritingAid
Free planStarting price£0 (Free) / ~£14/mo (Premium)
Top plan£299 (Lifetime)
NoteLifetime deal available
Prices are approximate. Check official sites for current offers.
Feature Checklist
Feature-by-Feature
| Feature | Grammarly Premium | ProWritingAid |
|---|---|---|
| Free plan available | ||
| Grammar & spelling | ||
| Plagiarism checker | ||
| Tone detector | — | |
| AI text generation | ||
| Browser extension | ||
| Microsoft Word add-in | ||
| Team style guides | — | |
| 20+ style reports | — | |
| Lifetime plan | — |
Grammarly Premium
AI Writing
What you'll love
- Best-in-class grammar and spelling detection
- Works in 500,000+ apps via browser extension
- Plagiarism checker scans billions of web pages
- GrammarlyGO AI rewrites and generates text
What could be better
- Premium is more expensive than ProWritingAid
- Some suggestions can feel repetitive
- Browser extension can slow older machines
Trust score
87%
ProWritingAid
AI Writing
What you'll love
- More in-depth writing analysis than Grammarly
- Cheaper annual plan than Grammarly Premium
- 20+ writing reports (readability, style, structure)
- Lifetime plan is excellent value
What could be better
- Less polished UI than Grammarly
- Fewer integrations and browser support
- Mobile experience is limited
Trust score
82%
Best For
Who Should Choose Which?
Choose Grammarly Premium if you are…
Students & academics
Business professionals
Content writers
Non-native English speakers
Choose ProWritingAid if you are…
Fiction & non-fiction authors
Academic writers
Budget-conscious writers
Grammarly Premium at a glance
Founded2009
Users30M+ daily
PlatformsWeb, iOS, Android, Mac, Windows
Trust score87%
ProWritingAid at a glance
Founded2012
Users3M+
PlatformsWeb, Mac, Windows, Scrivener
Trust score82%
Final Verdict
Grammarly Premium wins this comparison
Grammarly Premium outperforms ProWritingAid across 6 of 8 compared categories. It is our "Best for Professionals" pick.