Grammarly has 30 million daily users and $30/month price tag. But with AI grammar tools improving rapidly, is paying for a premium grammar checker still worth it? Here's a direct comparison to help you decide.
Try a Free Grammar Checker First
Before paying for anything, run your text through the free AI grammar checker — it catches spelling, grammar, punctuation, and style issues instantly. No account, no watermark, no limit.
What a Grammar Checker Actually Does
Modern grammar checkers do much more than fix spelling:
- Spelling and typos: Basic but essential. Catches "recieve" vs "receive."
- Grammar errors: Subject-verb disagreement, dangling modifiers, incorrect tense sequences.
- Punctuation: Missing commas, incorrect semicolon use, apostrophe errors.
- Style and clarity: Overly complex sentences, passive voice overuse, wordiness.
- Tone detection: (Premium feature) flagging text that might read as harsh or overly casual.
- Plagiarism detection: (Premium only) checks text against online content.
Free Grammar Checkers: What You Get
AI-powered free tools in 2026 are dramatically better than the rule-based checkers of five years ago. A good free checker handles:
- All common grammar, spelling, and punctuation errors
- Basic style suggestions (wordy phrases, redundancies)
- Context-aware corrections (knowing "their" vs "there" depends on meaning)
For students proofreading essays, bloggers editing posts, or professionals checking emails, a free tool typically catches 90%+ of errors.
Where Grammarly Pulls Ahead
Grammarly Premium ($12–$30/month) adds:
- Advanced style and clarity rewriting: Suggests complete sentence restructuring, not just word-level fixes.
- Tone adjustments: Rewrites text to sound more confident, formal, or friendly.
- Plagiarism checker: Useful for academic writing and content that must be original.
- Browser extension: Checks grammar in real-time in every text field across the web — Gmail, LinkedIn, Google Docs, Slack.
- Document uploads: Review entire .docx files in one go with tracked changes.
Grammarly vs Free Tools: Direct Comparison
| Feature | Free grammar checker | Grammarly Premium |
|---|---|---|
| Spelling & grammar | ✓ Excellent | ✓ Excellent |
| Punctuation | ✓ Good | ✓ Excellent |
| Style suggestions | Basic | Advanced |
| Real-time browser checking | ✗ | ✓ |
| Plagiarism check | ✗ | ✓ |
| Document rewriting | Limited | Full |
| Cost | Free | $12–$30/month |
Who Should Pay for Grammarly?
- Content writers and bloggers publishing multiple articles per week who need browser-wide checking.
- Students who submit academic work requiring plagiarism checks.
- Business professionals who write dozens of important emails and proposals per day.
- Non-native English speakers who want the extra layer of style and tone guidance.
Who Should Use a Free Tool?
- Occasional writers (a few documents per week)
- Students checking drafts before submission
- Anyone who writes primarily in Google Docs or Word (which have built-in spell check)
- Anyone uncomfortable with a third-party extension having access to all browser text fields
Privacy Note
Grammarly's browser extension reads every text field you type in. If you work with confidential client data, legal documents, or sensitive personal information, be aware of what you're sharing. Free standalone checkers where you paste specific text are more privacy-friendly for sensitive content.