Grammarly vs PDF.ai
A side-by-side comparison to help you choose the right tool.
80
Grammarly scores higher overall (80/100)
But the best choice depends on your specific needs. Compare below.
| Feature | Grammarly | PDF.ai |
|---|---|---|
| Our score | 80 | 72 |
| Pricing | Free plan with basic grammar and spelling checks. Premium at $12/month (annual) or $30/month (monthly) adds tone, clarity, full-sentence rewrites, and plagiarism detection. Business at $15/user/month with style guides, brand tones, and admin controls. | Free tier with limited pages. Pro plans available for higher usage. |
| Free plan | Yes | Yes |
| Best for | professionals writing emails and business documents, students improving academic writing, content creators and marketers polishing copy, non-native English speakers building confidence, teams enforcing consistent brand voice and style guides | researchers and students who need to quickly extract information from papers, legal and finance professionals reviewing long documents, anyone who works with large PDFs and wants AI-powered search |
| Platforms | web, desktop, mobile, browser-extension | web |
| API | No | No |
| Languages | en | en, no, es, zh, ar |
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| Claim deal | Get started |
- Pricing
- Free plan with basic grammar and spelling checks. Premium at $12/month (annual) or $30/month (monthly) adds tone, clarity, full-sentence rewrites, and plagiarism detection. Business at $15/user/month with style guides, brand tones, and admin controls.
- Free plan
- Yes
- Best for
- professionals writing emails and business documents, students improving academic writing, content creators and marketers polishing copy, non-native English speakers building confidence, teams enforcing consistent brand voice and style guides
- Platforms
- web, desktop, mobile, browser-extension
- API
- No
- Languages
- en
PDF.ai
72
- Pricing
- Free tier with limited pages. Pro plans available for higher usage.
- Free plan
- Yes
- Best for
- researchers and students who need to quickly extract information from papers, legal and finance professionals reviewing long documents, anyone who works with large PDFs and wants AI-powered search
- Platforms
- web
- API
- No
- Languages
- en, no, es, zh, ar
80Choose Grammarly if:
- You are professionals writing emails and business documents
- You are students improving academic writing
- You are content creators and marketers polishing copy
- You want to start free
72Choose PDF.ai if:
- You are researchers and students who need to quickly extract information from papers
- You are legal and finance professionals reviewing long documents
- You are anyone who works with large PDFs and wants AI-powered search
- You want to start free
FAQ
- What is the difference between Grammarly and PDF.ai?
- Grammarly is the most widely used ai writing assistant, offering real-time grammar, spelling, tone, and clarity suggestions across virtually any text field via browser extensions, desktop apps, and mobile keyboards. its generative ai features now handle full rewrites and drafting. PDF.ai is an ai-powered tool that lets you chat with any pdf document to ask questions, get summaries, and find information instantly.
- Which is cheaper, Grammarly or PDF.ai?
- Grammarly: Free plan with basic grammar and spelling checks. Premium at $12/month (annual) or $30/month (monthly) adds tone, clarity, full-sentence rewrites, and plagiarism detection. Business at $15/user/month with style guides, brand tones, and admin controls.. PDF.ai: Free tier with limited pages. Pro plans available for higher usage.. Grammarly has a free plan. PDF.ai has a free plan.
- Who is Grammarly best for?
- Grammarly is best for professionals writing emails and business documents, students improving academic writing, content creators and marketers polishing copy, non-native English speakers building confidence, teams enforcing consistent brand voice and style guides.
- Who is PDF.ai best for?
- PDF.ai is best for researchers and students who need to quickly extract information from papers, legal and finance professionals reviewing long documents, anyone who works with large PDFs and wants AI-powered search.