What is the difference between Grammarly and ProWritingAid?

Grammarly focuses on Grammar and spell check and is freemium, while ProWritingAid specializes in Style analysis reports and is freemium. Both are AI Writing tools.

Is Grammarly or ProWritingAid better?

It depends on your needs. Grammarly excels at Works across all platforms, while ProWritingAid is known for Extremely detailed reports. Compare their features above to decide which fits your workflow.

Grammarly vs ProWritingAid

AI Writing tools comparison · Updated 2026

Choosing between Grammarly and ProWritingAid? Both are popular AI Writing tools. Grammarly starts at Freemium and focuses on Grammar and spell check. ProWritingAid starts at Freemium and specializes in Style analysis reports. Here's a detailed side-by-side comparison to help you decide.

At a Glance

	Grammarly	ProWritingAid
Category	AI Writing	AI Writing
Pricing	freemium	freemium
Starting Price	Freemium	Freemium
Best For	grammar, writing-assistant, proofreading	grammar, style-analysis, editing
Features	6 listed	6 listed

Grammarly

AI writing assistant for grammar, clarity, tone, and style improvements.

AI Writing freemium

Visit Grammarly → Alternatives

ProWritingAid

In-depth writing analysis for grammar, style, readability, and structure.

AI Writing freemium

Visit ProWritingAid → Alternatives

Feature Comparison

Grammarly	ProWritingAid
✓ Grammar and spell check	✓ Style analysis reports
✓ Tone detection	✓ Readability scoring
✓ Plagiarism checker	✓ Grammar checker
✓ Style suggestions	✓ Overused word detection
✓ Browser extension	✓ Sentence variety analysis
✓ Generative AI writing	✓ Integrations with Word and Scrivener

Pricing Comparison

Grammarly

freemium

Free basic grammar checking. Premium $12/mo. Business $15/member/mo.

ProWritingAid

freemium

Free tier with 500-word limit. Premium $30/mo or $120/yr. Lifetime $399.

Pros & Cons

Grammarly

Pros

+ Works across all platforms
+ Excellent grammar detection
+ Intuitive interface
+ Real-time suggestions

Cons

− Premium is expensive for individuals
− Occasional false positives
− Limited free tier features

ProWritingAid

Pros

+ Extremely detailed reports
+ Lifetime purchase option
+ Great for long-form writing
+ Integrates with many editors

Cons

− Interface can be overwhelming
− Free tier very limited
− Slower than Grammarly
− Learning curve for reports

The Verdict

Both Grammarly and ProWritingAid are strong AI Writing tools. Grammarly stands out for Works across all platforms, making it ideal if that's your priority. ProWritingAid excels at Extremely detailed reports, which may be more important for your workflow.