If you’re choosing between Grammarly vs ProWritingAid, you’ve probably noticed that everyone has an opinion and nobody agrees. You’re paying for a writing tool. Maybe you’ve already picked one. Maybe you’re about to. Either way, there’s a decent chance you’re about to make the wrong call. Not because one tool is bad, but because they’re built for completely different people.
This is the honest breakdown of Grammarly vs ProWritingAid. No fluff. No affiliate cheerleading. Just what these two tools actually do, who they’re actually for, and which one deserves your money.
What You’re Actually Choosing Between
Grammarly and ProWritingAid are not the same product with different price tags. They solve different problems.
Grammarly is for people who write constantly across many platforms and want help that shows up everywhere. Emails, Slack, Google Docs, social media, even text messages. It’s fast, clean, and borderline invisible in your workflow.
ProWritingAid is for people who write seriously and want to know why their writing isn’t working. Reports. Analysis. Pattern recognition. It’s less of a spell-checker and more of a writing coach that looks at your whole document and tells you what you keep getting wrong.
Same category. Completely different purpose.
Free Plans: One Is Useful, One Is a Teaser
Grammarly’s free plan is genuinely useful. You get unlimited words, real-time grammar and spelling checks, basic tone detection, and 100 AI prompts per month. It works across Chrome, Firefox, Edge, Safari, Google Docs, Gmail, and most places you write.
ProWritingAid’s free plan is more of a demo than a product. You’re limited to 500 words per check. That’s not a free plan. That’s a speed date.
Winner: Grammarly – by a wide margin.
Paid Plans: Where ProWritingAid Gets Interesting
This is where it flips.
Both tools start at roughly the same monthly price, around $30/month if you pay month to month. Go annual and the gap opens up.
- Grammarly Pro: approx. $144/year (check current pricing at Grammarly)
- ProWritingAid Premium: approx. $120/year (check current pricing at ProWritingAid)
ProWritingAid also has a lifetime license. Around $399 one-time at the time of writing, and you never pay again. For serious writers, that math works out after a few years. Grammarly has no lifetime option. You’re on the subscription treadmill indefinitely.
Winner: ProWritingAid – especially long-term.
Grammarly vs ProWritingAid Features: Speed vs Depth
Here’s the core difference in practice.
Grammarly catches errors as you type. It’s reactive, instant, and low-friction. In 2026, it’s also a legitimate AI writing tool. It can rewrite sentences, adjust tone, generate email drafts from bullet points, and run plagiarism checks. The AI prompt limit on Pro is 2,000 per month, which for most casual users is more than enough.
ProWritingAid runs reports. Not just one. More than 25 of them. Repeated words. Sentence length variation. Passive voice frequency. Pacing. Dialogue. Clichés. It doesn’t just fix the sentence in front of you. It tells you what pattern you keep repeating across the entire document.
If you’re writing an email, you want Grammarly. If you’re writing a long blog post and you want to know why it feels slow in the middle, you want ProWritingAid.
We compared both tools alongside others in our best AI writing tools roundup if you want a broader picture.
My Take
Neither tool is overpriced for what it does. But people keep buying the wrong one.
They buy Grammarly because everyone’s heard of it. Then they wonder why it keeps “fixing” things that weren’t broken. They buy ProWritingAid because it’s cheaper. Then they get buried under 47 suggestions on a 500-word email and give up.
The real question is simple: what do you write, and where?
Write short-form content, professional emails, social posts, quick articles? Use Grammarly. It lives in your browser, stays out of your way, and catches the embarrassing stuff before you hit send.
Write long-form content, blog posts over 1,500 words, fiction, or anything where style matters as much as grammar? Use ProWritingAid. Run it when you’re done drafting. It will find patterns you didn’t know you had.
If you’re a designer or creative professional, our guide to best AI tools for graphic designers covers how writing tools fit into that workflow.
Where Each One Falls Short
No tool is perfect. Here’s what to watch for.
Grammarly occasionally suggests changes that make your writing flatter. It will try to “fix” intentional style choices: sentence fragments, informal rhythm, unconventional punctuation. You’ll find yourself hitting “ignore” a lot if you have a distinct voice. Also: no lifetime plan, and the free tier’s 100 AI prompts run out faster than you’d think.
ProWritingAid’s interface looks like it was designed in 2015. That’s not a dealbreaker, but it’s not Grammarly’s clean dashboard either. The free plan’s 500-word limit is nearly useless. And there’s no mobile app. If you write on your phone, ProWritingAid simply isn’t there.
One more thing worth knowing: Grammarly’s parent company says individual users can opt out of having their content used to train and improve AI models, but that setting is on by default for individual accounts. ProWritingAid says it does not use your writing to train its algorithms. For some people, that matters.
Integrations: Grammarly Wins This Round
Grammarly works across major browsers, desktop apps, Gmail, Google Docs, Outlook, Word, Slack, Discord, LinkedIn, and most places people actually write. It also has a mobile keyboard for iOS and Android.
ProWritingAid is solid but narrower. It works with Word, Google Docs, and most major browsers. It also has strong native Scrivener integration, which Grammarly handles only indirectly. If you’re a novelist working in Scrivener, ProWritingAid is the better fit. For everyone else, Grammarly’s reach is hard to beat. No mobile app on the ProWritingAid side.
Quick Comparison: Grammarly vs ProWritingAid
| Feature | Grammarly | ProWritingAid |
|---|---|---|
| Free plan | Strong | Very limited |
| Annual price | approx. $144/yr | approx. $120/yr |
| Lifetime option | No | Yes (approx. $399) |
| Best for | Everyday writers | Serious/long-form writers |
| Mobile app | Yes | No |
| Scrivener | Limited/indirect | Strong native support |
| AI writing features | Strong | Basic |
| Depth of analysis | Moderate | Excellent |
| Data privacy | Opt-out required | Doesn’t use your text |
Prices are approximate and subject to change. Always check current rates on official sites.
Who Should Pick What
Choose Grammarly if:
- You write across many platforms daily
- You need writing help everywhere: email, Slack, browser, phone
- You’re a student, professional, or blogger who wants fast, clean suggestions
- You want AI writing features built in
Choose ProWritingAid if:
- You write long-form content, fiction, or anything where style matters
- You use Scrivener
- You want a lifetime license and no more subscription payments
- You want to understand your writing patterns, not just fix individual sentences
Use both if:
- You write seriously and professionally
- You want ProWritingAid for deep revision passes and Grammarly for day-to-day corrections
- Your workflow can handle two tools without losing your mind
Try Grammarly free | Try ProWritingAid free
Survived 20 years of clients, deadlines, and bad briefs. Started Wizformer to see if working for yourself is actually better. Jury's still out.