Comparison

Grammarly: Free AI Writing Assistance vs ProWritingAid

Grammarly: Free AI Writing Assistance and ProWritingAid both land on Worth it.

Grammarly: Free AI Writing Assistance

Worth it

Confidence: Medium

Buy the free tier for everyday writing . it is genuinely useful at $0.

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ProWritingAid

prowritingaid.com

Worth it

Confidence: Medium

Buy it if you write long fiction and want deep self-editing reports at roughly $60 a year.

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Grammarly: Free AI Writing Assistance versus ProWritingAid
Compare	Grammarly: Free AI Writing Assistance	ProWritingAid
Verdict	Worth it	Worth it
Best for	Students and academics	Novelists self-editing long manuscripts
Who it's not for	Novelists fearing AI-detection flags	Busy professionals who only need typo fixes
Privacy	Third-party scan scores 89/100; official product security page published; no public CVEs found in reviewed sources.^³	No known public vulnerabilities found in the sources reviewed.¹¹
Support quality	No support evidence in sources	No evidence in sources
Public sentiment	Casual users praise the free version, while some fiction writers report AI-detection accusations and fatigue with constant suggestions.^⁴	Reviewers praise it as a deep editing toolkit that speeds up revision and integrates smoothly with writing apps.¹²
Biggest gotcha	Advanced rewrites and tone tools sit behind Pro; the free tier nudges you to upgrade^¹	$60/year is a 25%-off sale price; standard renewal rate is likely higher (Guess)¹⁶

Pick Grammarly: Free AI Writing Assistance when

Students and academics
Everyday email and docs
Non-native English writers
Solo bloggers

When Grammarly: Free AI Writing Assistance is not a fit

Novelists fearing AI-detection flags
Writers who resent constant suggestions
Fiction writers wanting minimal AI interference

Pick ProWritingAid when

Novelists self-editing long manuscripts
Fiction writers wanting style and craft reports
Writers drafting in Word or Scrivener (Guess)
Indie authors editing before publishing

When ProWritingAid is not a fit

Busy professionals who only need typo fixes
Casual writers unwilling to learn a report-heavy tool
Anyone expecting the full toolkit for free
Teams needing collaborative content workflows

Sources

Grammarly: Free AI Writing Assistance (official)grammarly.com
official
Product security pagegrammarly.com
security
Is grammarly.com Safe? Security Score 89/100cystack.net
security
Do you use Grammarly? I use the free version and find it usefulfacebook.com
review
AI Accusation on My Novelreddit.com
review
Is using grammerly count as ai?reddit.com
review
Should I buy a yearly plan for writing tools?facebook.com
review
Metro Government AI Use Registrynashville.gov
news
Grammarly for ASU Students Explainedscribd.com
news
Still correcting Grammarly's corrections?instagram.com
review
ProWritingAid official siteprowritingaid.com
official
Kat Clay: Is ProWritingAid worth your money?katclay.com
review
Jerry Jenkins: ProWritingAid Reviewjerryjenkins.com
review
G2: ProWritingAid Reviewsg2.com
review
Whop: ProWritingAid reviewwhop.com
review
FearlessProse 25%-off promo ($60/year)facebook.com
news