Grammarly vs ProWritingAid: which editing tool fits you
Both check grammar, spelling and style, and both have free plans. Grammarly is built for quick checks wherever you type. ProWritingAid leans toward longer writing and detailed style reports.
Jump to the toolsNot sure? Take the quiz
Some links on this page are affiliate links, which means we may earn a commission at no cost to you. It does not change what we recommend. How we review and our affiliate disclosure.
Read this first. Prices for both tools differ between sources and change often, so we show only what the sources agree on. Part of this page draws on ProWritingAid's own comparison, which favours ProWritingAid. Confirm prices on each vendor's site.
The short answer
Grammarly for easy everyday checking in any app, ProWritingAid if you write long pieces and want deeper reports.
- Grammarly. Pick it if you want quick, real-time checking across email, browsers and documents, plus a stronger free plan.
- ProWritingAid. Pick it if you write long pieces such as blog posts or books and want in-depth style reports, or a lifetime plan.
Side by side
| Grammarly | ProWritingAid | |
|---|---|---|
| Best for | Everyday writing in many apps | Longer writing and detailed style analysis |
| Free plan | Yes, and one source rates it better than ProWritingAid's | Yes, with limits on how much text you can check |
| Paid plans | About $12 per month on an annual plan, or about $30 on a monthly plan, per one source | Monthly, yearly and lifetime plans. Sources disagree on exact prices |
| Strengths | Works across many platforms, real-time suggestions, tone and clarity feedback | Many style reports, long-form analysis, and a lifetime plan, according to ProWritingAid |
| Watch out for | Premium is the more expensive option and can suggest unneeded changes | Plagiarism checking is described as weak by one source, and support can be slower |
| Mobile apps | iOS and Android apps, according to ProWritingAid | No mobile app, according to its own page |
Pricing is from ToolRadar (updated 5 November 2026) and Codeless. Feature claims about ProWritingAid come partly from its own page. Confirm on each vendor's site.
Each tool in a little more detail
Grammarly
Good for
- Works across many platforms with real-time suggestions.
- Tone and clarity feedback, and a good free plan.
Watch out for
- Premium features cost more than the competition.
- Can suggest changes you do not need.
- Some reviewers raise concerns about cloud processing of your text.
ProWritingAid
Good for
- Style reports and long-form analysis suit blog posts and books.
- Has a lifetime plan, according to its own page.
- Cheaper than Grammarly, according to one source.
Watch out for
- Less well known, and the interface has a learning curve.
- One source calls its plagiarism checking inaccurate.
- One source reports slower support replies.
Who should pick which
- You write emails, messages and documents all dayStart with Grammarly.
- You write blog posts, ebooks or fiction and want style reportsStart with ProWritingAid.
- You are on a tight budgetUse both free plans on a real piece of writing and keep the one you find more useful.
Related reading: ChatGPT vs Claude vs Gemini: which AI assistant fits your work. Claude for longer writing, ChatGPT for the widest feature set, Gemini if you live in Google Workspace.
Common questions
Do I need to pay for either one?
Not at first. Both have free plans, so test them on real writing before paying.
Can an AI assistant replace them?
Assistants like ChatGPT or Claude can edit text too, but these tools check as you type. See our assistant comparison for the differences.
Our hands-on testing
Researched from sources
We have not tested these tools ourselves yet. Everything above comes from the sources listed below. When we test a tool, our own notes and screenshots will appear here and this label will change.
Sources
- Grammarly vs ProWritingAid, ToolRadar, updated 5 November 2026
- ProWritingAid vs Grammarly, Codeless
- ProWritingAid vs Grammarly, ProWritingAid (vendor page)
We have not hands-on tested every tool on this page. Details come from the sources above. See how we review.