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AI Tool Comparison
Grammarly vs ProWritingAid
A side-by-side breakdown to help you pick the right tool for your workflow.
Grammarly
Catch grammar and clarity issues as you write, then let built-in AI agents draft, rewrite, and complete tasks across your apps. Grammarly's parent company rebranded to Superhuman in October 2025.
Writing
freemium
ProWritingAid
Run a manuscript through 25+ style and grammar reports and get a full chapter critique daily, with a one-time lifetime purchase option instead of a subscription.
Writing
freemium
Bottom Line
Grammarly edges ahead on rating (4.7 vs 4.5), but the right pick still comes down to which workflow you're running.
Choose Grammarly if…
Writing
Choose ProWritingAid if…
Writing
| Attribute | Grammarly | ProWritingAid |
|---|---|---|
| Category | Writing | Writing |
| Pricing | freemium | freemium |
| Pricing Detail | Free / $12/mo Pro (annual) / Enterprise custom | Free / $30/mo Premium / $36/mo Premium Pro / $399 lifetime |
| Rating |
Key Features
Grammarly
- Grammar and spelling checks
- Tone detection
- Plagiarism checker
- Generative AI co-creator
- Browser extension
ProWritingAid
- 25+ writing reports
- Style guide
- Readability analysis
- Word explorer
- Integration with Scrivener/Word/Google Docs
Pros
Grammarly
- •Works everywhere you write
- •Highly accurate suggestions
- •Improves overall writing quality
- •Generative features are helpful
ProWritingAid
- •Most thorough writing analysis available
- •Excellent for learning writing style
- •Works in your favorite writing app
- •Great for long-form writers
Cons
Grammarly
- Premium plan is somewhat pricey
- Can be overly pedantic
- Generative features are basic compared to ChatGPT
ProWritingAid
- Reports can be overwhelming
- Less useful for short-form marketing copy
- Interface is dated