Grammarly vs ProWritingAid
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Freemium
A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers.
AI tool · Freemium
A grammar checker and style editor with in-depth reports, aimed at long-form and fiction writers.
Our verdict
Grammarly is a general-purpose writing assistant that catches errors and checks tone across many apps and browsers, so it suits everyday emails, messages and documents. ProWritingAid is built for long-form work, offering in-depth style reports aimed at manuscripts and fiction, though its many reports can feel overwhelming. Both are freemium, so the choice comes down to whether you need broad everyday coverage or deeper editing of longer texts.
Pick Grammarly if you want quick proofreading and tone checks on everyday writing like emails, messages and documents across many apps.
Pick ProWritingAid if you are editing a long manuscript, novel or other long-form text and want detailed style reports.
| Key difference | Grammarly | ProWritingAid |
|---|---|---|
| Best at | Everyday proofreading, tone checks and wide app coverage | In-depth style reports for long-form and fiction writing |
Written with AI from both products' catalogue entries · updated 2026-10-29
Who each one is for
Choose Grammarly if you need…
- Proofreading everyday writing
- Tone checks on emails
Choose ProWritingAid if you need…
- Manuscript editing
- Detailed style reports
Side-by-side
| Grammarly | ProWritingAid | |
|---|---|---|
| Type | Writing · Editing & grammar | Writing · Editing & grammar |
| Price | Freemium | Freemium |
| Platforms | Web, Chrome, macOS, Windows, iOS, Android | Web, Windows, macOS, Chrome |
| Works with | Chrome, Google Workspace, Microsoft 365 | Microsoft 365, Google Workspace, Chrome |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
Grammarly
A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers. Catches errors wherever you type. Suggestions can flatten a distinctive voice; accept them selectively.
ProWritingAid
A grammar checker and style editor with in-depth reports, aimed at long-form and fiction writers. More depth for long-form than Grammarly. The number of reports can be overwhelming.
Best for
Grammarly
- Proofreading everyday writing
- Tone checks on emails
ProWritingAid
- Manuscript editing
- Detailed style reports
Strengths
Grammarly
- Grammar and clarity suggestions
- Tone detection
- Generative rewrites
- Works across apps via extension
ProWritingAid
- Grammar and style checks
- Over 20 writing reports
- Integrations with Word and Scrivener
- AI rephrase
Frequently asked questions
Should I use Grammarly or ProWritingAid?
Grammarly is a general-purpose writing assistant that catches errors and checks tone across many apps and browsers, so it suits everyday emails, messages and documents. ProWritingAid is built for long-form work, offering in-depth style reports aimed at manuscripts and fiction, though its many reports can feel overwhelming. Both are freemium, so the choice comes down to whether you need broad everyday coverage or deeper editing of longer texts. Pick Grammarly if you want quick proofreading and tone checks on everyday writing like emails, messages and documents across many apps. Pick ProWritingAid if you are editing a long manuscript, novel or other long-form text and want detailed style reports.
What is the difference between Grammarly and ProWritingAid?
Grammarly: A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers. ProWritingAid: A grammar checker and style editor with in-depth reports, aimed at long-form and fiction writers. Grammarly suits proofreading everyday writing, while ProWritingAid suits manuscript editing.
Are Grammarly and ProWritingAid free?
Grammarly: Freemium. ProWritingAid: Freemium.
What are other alternatives to Grammarly and ProWritingAid?
Other options people compare them with include LanguageTool, QuillBot, Wordtune, Hemingway Editor, DeepL.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.