kitio.aiGrammarly vs Lightkey
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Lightkey has the lower starting price: about $4 a month, against $30 for Grammarly.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Grammar and spelling checks
- Tone detection
- Full-sentence rewrites
- Plagiarism checker
- Authorship tracking
- Multi-word text prediction
- Real-time spelling suggestions
- 80+ languages offline
- Chrome and Edge extensions
- Team terminology predictions
| Feature | Grammarly | Lightkey |
|---|---|---|
| Best for | Grammar, tone and rewrite suggestions in almost every app you type in | On-device predictive text for Windows that learns your writing style |
| Category | Writing | Writing |
| Pricing model | Freemium | Free trial |
| Starting price | $30/mo | $49.95/yr |
| Free plan | Yes | No, 30-day trial |
| Made by | Superhuman Platform Inc. | Lightkey |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Lightkey has the lower starting price: about $4 a month, against $30 for Grammarly.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- Spelling and grammar checks
- Tone detection
- 100 AI prompts
Pro
$30/mo
- Per member
- Full-sentence rewrites
- Tone adjustments
- Plagiarism and AI detection
Enterprise
Contact sales
- BYOK encryption
- Custom roles and permissions
- Data loss prevention
- Dedicated support
2 plans
Pro
$49.95/yr
- Per license
- Predicts up to 18 words
- 80+ languages offline
- Lifetime license $229.95
Business
$69.95/yr
- Per license
- Team terminology predictions
- Team analytics
- Site-wide deployment
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Grammarly
- Works in nearly every app and website
- Free plan catches most basic errors
- Clear explanations for each suggestion
- Best features need the paid plan
- Can flatten a writer's personal style
- English only
Lightkey
- Runs on device and offline
- Works across most Windows apps
- Lifetime license option
- Windows only, no Mac version
- No free plan after the 30-day trial
- Predictions need time to learn your style
Which one should you choose?
Choose Grammarly if you want:
- Works in nearly every app and website
- Free plan catches most basic errors
- Clear explanations for each suggestion
Watch out: best features need the paid plan.
Choose Lightkey if you want:
- Runs on device and offline
- Works across most Windows apps
- Lifetime license option
Watch out: windows only, no mac version.
Grammarly vs Lightkey FAQ
What is the difference between Grammarly and Lightkey?
Grammarly: Grammar, tone and rewrite suggestions in almost every app you type in. Lightkey: On-device predictive text for Windows that learns your writing style. Both are writing tools.
Is Grammarly or Lightkey cheaper?
Lightkey has the lower starting price: about $4 a month, against $30 for Grammarly.
Do Grammarly and Lightkey have free plans?
Grammarly: Yes. Lightkey: No, 30-day trial.
Who makes Grammarly?
Grammarly is made by Superhuman Platform Inc., based in United States.
Who makes Lightkey?
Lightkey is made by Lightkey.
Which should I choose, Grammarly or Lightkey?
Choose Grammarly if you value works in nearly every app and website and free plan catches most basic errors. Choose Lightkey if you value runs on device and offline and works across most windows apps.