Grammarly vs Claude vs ChatGPT: Best AI Writing Assistant (2025)
Grammarly vs Claude vs ChatGPT: Which Is the Best AI Writing Assistant?
These three tools approach AI writing differently. Grammarly edits your existing writing. Claude and ChatGPT generate new text. Here is how to choose.
TL;DR: Grammarly for real-time grammar and style editing across all websites. Claude for the highest quality AI-generated writing. ChatGPT for brainstorming and versatile content creation. Most writers benefit from Grammarly + either Claude or ChatGPT.
Comparison
| Feature | Grammarly | Claude | ChatGPT |
|---|---|---|---|
| Primary function | Editing | Generation | Generation |
| Writing quality | Improves yours | Best AI writing | Very Good |
| Real-time editing | Best (everywhere) | No | No |
| Tone detection | Yes | Adjustable | Adjustable |
| Long-form content | Editing only | Best | Good |
| Email writing | GrammarlyGO | Very Good | Good |
| Browser extension | Best | No | Yes |
| Free tier | Very Good | Good | Good |
| Price | Free/$12/mo | Free/$20/mo | Free/$20/mo |
Choose Based on Your Need
- Improve your own writing: Grammarly — catches errors and improves style as you type
- Generate high-quality content: Claude — most natural, human-like writing
- Brainstorm and draft quickly: ChatGPT — versatile content generation
- Professional emails: Grammarly + Claude — edit in real-time, generate when needed
- Content marketing: ChatGPT or Claude + Grammarly for polish
Best Combo
Grammarly Free + Claude Free = $0/month. Grammarly catches errors as you write, Claude generates content when needed. This free combination covers most writing needs.
Grammar: Grammar checkers compared. Non-native: AI for non-native speakers. Writers: AI for writers.
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