Grammarly vs PDFT.AI
Side-by-side comparison of features, pricing, ratings, and alternatives.
Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, and style in real time across browsers, desktop apps, and mobile keyboards. It integrates directly into Gmail, Google Docs, Microsoft Word, Slack, and thousands of other websites via a browser extension. Beyond basic correctness, Grammarly analyzes tone and clarity, suggesting rewrites to make writing more concise, confident, or friendly depending on the context and audience selected by the user. GrammarlyGO adds generative AI features for drafting emails, replying to messages, and rewriting passages on demand, while Grammarly Business adds brand style guides and analytics for teams that need consistent written communication across an organization.
PDFT.AI is an AI-powered document translation platform that translates PDFs and other office files while preserving the original layout, formatting, and design. It supports over 100 languages, including right-to-left languages, and is designed for students, professionals, and teams needing fast, accurate document translation.
Free for basic corrections; Premium starts at $12/month, Business at $15/user/month.
All plans are shown as monthly plans.
- Works across almost every app via browser extension
- Good tone and clarity suggestions beyond basic grammar
- GrammarlyGO speeds up drafting
- Free tier is genuinely useful
- Preserves original document layout and formatting
- Supports PDF, DOCX, PPTX, XLSX, JPG, and PNG
- Handles over 100 languages, including RTL languages
- Free plan available for small files
- Premium features behind a subscription
- Occasional over-aggressive suggestions
- Privacy concerns for some sensitive writing contexts
- Full free translation limited to small files or preview pages
- Complex layouts, handwritten notes, or unclear elements may affect output quality
- Requires registration to complete translations
What reviewers say
Grammarly Reviews
3.0 (2)Good, not great
Grammarly is solid overall, though it's not perfect. On the plus side, good tone and clarity suggestions beyond basic grammar. That said, premium features behind a subscription, which held us back from rating it higher.
Good, not great
Mixed feelings about Grammarly after using it for a while. On the plus side, free tier is genuinely useful. That said, privacy concerns for some sensitive writing contexts, which held us back from rating it higher.
PDFT.AI Reviews
No reviews yet.
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Highlights hard-to-read sentences, passive voice, and adverbs to make your writing clearer.
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Translate PDFs with human-like accuracy—formatting preserved across 100+ languages.
The Verdict
AI-generated from listing dataPDFT.AI is a paid AI‑driven document translator focused on preserving layout, while Grammarly is a freemium writing assistant for grammar and style.
Key differences
- •PDFT.AI translates entire documents (PDF, DOCX, PPTX, XLSX, images) preserving formatting; Grammarly only checks and improves text, not translate files.
- •PDFT.AI charges per word or subscription with a free preview; Grammarly offers a free tier with basic checks and paid plans for advanced features.
- •PDFT.AI supports 100+ languages and can handle large files up to 100 MB; Grammarly works in many apps but is limited to English‑language writing.
- •PDFT.AI’s security note mentions encrypted upload and deletion after processing; Grammarly’s privacy concerns are noted but no specific security details provided.
- •PDFT.AI has no integrations; Grammarly provides browser extensions and integrations with Gmail, Google Docs, Word, Slack.
Pricing & value
PDFT.AI starts at $0.30 per 500 words with a free preview; Grammarly free tier limited to basic checks, premium starts at $12/mo.
Ease of use / learning curve
Grammarly works via browser extensions across apps, requiring minimal setup; PDFT.AI needs registration and file upload.
Features & depth
Grammarly offers real‑time grammar, tone, plagiarism, and generative AI; PDFT.AI focuses solely on document translation.
Integrations & ecosystem
Grammarly integrates with Gmail, Google Docs, Word, Slack; PDFT.AI has no listed integrations.
Collaboration
Grammarly provides brand style guides for teams; PDFT.AI has no collaboration features.
Scalability
PDFT.AI handles files up to 100 MB and batch processing; Grammarly processes text snippets per app.
Security & privacy
PDFT.AI explicitly states encrypted upload and deletion after processing; Grammarly only notes privacy concerns.
Choose Grammarly if…
Writers, students, or teams needing real‑time English grammar, tone, and plagiarism checks across many apps.
Choose PDFT.AI if…
Students or professionals needing accurate, layout‑preserving translation of large or scanned documents.
Common questions
Can I translate a 90 MB PDF for free?
No; PDFT.AI offers a free preview for small files only. Full translation of large files requires paid usage.
Does Grammarly work on documents I edit in Microsoft Word?
Yes; Grammarly integrates with Microsoft Word via its browser extension and desktop app.
Which tool provides better data security for sensitive documents?
PDFT.AI states files are uploaded over encrypted connections and deleted after processing; Grammarly’s privacy details are not specified.