Grammar vs Style
Grammarly focuses on grammar, clarity, and tone. ProWritingAid goes deeper into style analysis: sentence variety, pacing, dialogue tags, cliches, readability scores.
Accuracy
Both catch 95%+ of grammar errors. Grammarly has fewer false positives. ProWritingAid catches more style issues but occasionally flags intentional creative choices.
For more on this topic, see our guide on how to use ai to write blog posts that actually rank.Pricing
Grammarly: Free (basic), Premium $12/month (annual). ProWritingAid: Free (basic), Premium $10/month (annual) or $399 lifetime. The PWA lifetime deal is unbeatable value.
Integrations
Grammarly: Chrome, Word, Google Docs, desktop app, mobile keyboard. ProWritingAid: Chrome, Word, Google Docs, Scrivener, desktop app. Grammarly has better mobile support; PWA has better Scrivener integration.
AI Writing
Both now include AI writing assistance. Grammarly GrammarlyGO rewrites paragraphs, adjusts tone, generates text. ProWritingAid Sparks suggests rephrasing and expansions.
Verdict
Grammarly for everyday writing, business communication, ESL writers. ProWritingAid for fiction authors, long-form writers, and anyone who wants deep style analysis at a lower price.