Grammarly vs ProWritingAid: Which Writing Tool Wins?
Quick Comparison
| Grammarly | ProWritingAid | |
|---|---|---|
| Best For | Writers and professionals who want corrections as they type across email, docs, and social platforms rather than a separate editing pass. | Authors and editors working on manuscripts, essays, or long-form drafts who want structural and stylistic feedback beyond line-by-line corrections. |
| Pricing | Free tier available / $12/mo starting | Free tier available / $10/mo starting |
| Winner | Our Pick |
Tool Breakdown
Grammarly
For most writers who need real-time grammar and tone corrections across email, docs, and social platforms, Grammarly's broader free tier and near-universal browser integration make it the easier daily driver. ProWritingAid remains the better pick specifically for long-form fiction and manuscript editing, especially given its lifetime-license option.
- Works inline across Gmail, Google Docs, Slack, LinkedIn, and most browser text fields, plus native desktop and mobile apps — no need to paste text into a separate tool.
- Free tier includes a working tone detector and 100 AI prompts/month, more functional out of the box than most competing free tiers.
- Grammarly Pro's brand-voice matching and 2,000 monthly AI prompts support team-wide style consistency for organizations up to 149 seats.
- No lifetime or one-time-purchase option — Pro is subscription-only at $12–30/month depending on billing term.
- Free tier's AI prompt allowance (100/month) and tone detection are more basic than Pro's full suite; heavier AI-assisted rewriting requires upgrading.
ProWritingAid
A deep-editing style and grammar checker offering 25+ analysis reports aimed at long-form writers, novelists, and editors.
- 25+ in-depth reports (overused words, pacing, readability, sentence-length variation, and more) go beyond real-time grammar correction into structural editing feedback.
- Offers a genuine one-time lifetime license (roughly $399 for Premium, $699 for Premium Pro) — pay once, keep future updates, no ongoing subscription.
- Built-in Word Explorer/thesaurus and desktop integrations, including Scrivener, cater specifically to fiction writers and long-document workflows.
- Free tier is capped at 500 words per check and only two report runs per day — impractical for editing a full chapter or manuscript without upgrading.
- Real-time, in-line suggestion experience is generally considered less polished than Grammarly's for everyday short-form writing (email, chat, social posts).
Frequently Asked Questions
Does Grammarly or ProWritingAid have a better free plan? +
It depends on what you're writing. Grammarly's free tier has no per-check word limit — it corrects grammar, spelling, and punctuation and includes a basic tone detector plus 100 AI prompts per month, everywhere you type in a browser or supported app. ProWritingAid's free tier is permanent too, not a trial, but it caps each check at 500 words and limits you to two full report runs per day, which is fine for a blog post but restrictive for a full chapter or long document. For everyday short-form writing, Grammarly's free plan goes further; for occasional long-form editing without paying, you'll hit ProWritingAid's cap quickly and may need to check a document in multiple passes.
Is ProWritingAid's lifetime license actually worth it compared to Grammarly's subscription? +
If you know you'll use a grammar and style checker for years, ProWritingAid's lifetime license (roughly $399 for Premium, $699 for Premium Pro) can work out cheaper than paying monthly indefinitely — it's a one-time payment that includes future updates with no renewal. Grammarly doesn't offer an equivalent one-time option; Grammarly Pro is subscription-only at $12–30/month depending on billing term. The trade-off is upfront cost: ProWritingAid's lifetime price is a bigger initial outlay than a single month or year of either tool, so it mainly pays off for writers committing to long-form work over multiple years rather than casual or short-term users.
Which tool integrates better with the apps I already use? +
Grammarly is built around broad, real-time integration — it works inline inside Gmail, Google Docs, Slack, LinkedIn, and most other browser text fields, plus dedicated desktop and mobile apps, so suggestions appear as you type almost anywhere. ProWritingAid focuses more narrowly on writing-specific environments, with integrations aimed at long-form tools like Scrivener alongside its own desktop app and browser extension. If you write across many different everyday apps and want consistent inline corrections, Grammarly's integration footprint is wider; if your writing lives mainly in a dedicated manuscript or drafting tool, ProWritingAid's targeted integrations and deeper reports may matter more than broad app coverage.