Nylio vs Grammarly: AI That Writes With You, Not After You
Grammarly checks your grammar after you write. Nylio helps you write — drafting, rewriting, web research, and grammar — all in one AI document editor.
Grammarly catches typos and grammar mistakes after you have written. Nylio goes further: it is a full document editor where AI helps you draft, rewrite, research, and polish — all in one place. Import from Google Docs or Word, collaborate in real-time, and export professional documents. Stop copying between apps.
Feature Comparison
Feature
Nylio
Grammarly
Primary Purpose
AI document editor — drafts, rewrites, researches, and checks grammar
Grammar checker that fixes mistakes after writing
AI Writing Help
Drafting, rewriting, web research, and editing assistance
Grammar and style suggestions only
Advanced AI Models
GPT-5.4, Sonnet 4.6, GPT-5.4 Mini (Pro plan)
Proprietary grammar model only
Document Editor
Full editor with formatting, structure, and DOCX export
No document editor — works as overlay in other apps
Collaboration
Real-time editing, comments, version history
No collaboration features
Import
Import from Google Docs, Word & Markdown
No import — works in other apps only
Grammar Checking
Real-time spellcheck, grammar, and style suggestions
Excellent grammar and style checking across apps
Pricing
Free (4 AI credits/day) or $20/mo Pro with 200 credits
Free basics or $12/month for premium
Choose Nylio
Best for AI-assisted writing
- You want AI that helps you write, not just checks grammar after
- You need a real document editor with formatting, structure, and DOCX export
- You collaborate with others and need comments and version history
- You want to research and cite sources without leaving your document
- You want access to advanced models like GPT-5.4 and Sonnet 4.6
Choose Grammarly
When these matter more
- You just need grammar checking across all your apps (email, Slack, etc.)
- You only need proofreading for short messages, not document creation
- You do not need collaboration or professional document export
- You prefer a browser extension over a dedicated editor
Summary
Choose Grammarly if you just need grammar checking in whatever app you already use. Choose Nylio if you want AI that helps you write, not just proofread, in a real document editor with collaboration and export.