Detailed comparison across 10 dimensions
Winner: Languagetool
LanguageTool clearly comes out ahead of Duolingo on Staquest's weighted six-dimension score. Both offer a free tier. Paid plans start at $12.99/mo for Duolingo and $24.90/mo for LanguageTool.
| Overview | ||
|---|---|---|
| Type | ai tool | hybrid |
| Company | Duolingo, Inc. | LanguageTool |
| Free Tier | ||
| Has API | ||
| Open Source | ||
| Learning Curve | - | - |
| Integration | - | - |
| Trending | Stable | Stable |
| GitHub Stars | - | - |
| Industries | DevelopmentMarketingEducation & EdTechAI & Machine Learning | MarketingDesignAI & Machine Learning |
| Categories | edtech-lms | ai-writing |
| Website | Visit | Visit |
Languagetool
per user
per user
per user
freemium
per user
per user
| Feature | duolingo | languagetool |
|---|---|---|
| Everything In Free | ||
| Access To All Language Courses | ||
| Add-Ins For Microsoft Word, Google Docs, Etc. | ||
| Ad-Free Experience | ||
| Advanced Grammar, Punctuation, And Style Checking | ||
| Ad-Supported | ||
| Basic Grammar, Punctuation, And Style Checking | ||
| Ai-Powered Features (Roleplay, Video Call) | ||
| Browser Extension | ||
| Everything In Super Duolingo | ||
| Everything In Premium | ||
| Gamified Lessons | ||
| Personal Dictionary | ||
| Mistake Review | ||
| Team Dictionary | ||
| Personalized Practice | ||
| Team Style Guide | ||
| Shared Access For Up To 6 Users | ||
| Up To 10,000 Characters Per Text | ||
| Unlimited Hearts | ||
| Up To 150,000 Characters Per Text | ||
| User Management |
Showing 22 of 22 features
Dashes mean the feature isn't listed in our data. The tool may still support it.
On Staquest's weighted six-dimension scoring, LanguageTool comes out ahead overall, though Duolingo can be the better fit depending on your priorities — see the dimension-by-dimension breakdown above.
Duolingo's paid plans start at $12.99/mo and LanguageTool's start at $24.90/mo, so Duolingo is the lower entry price. Check the pricing comparison for higher tiers and per-seat costs.
Both Duolingo and LanguageTool offer a free tier.
Duolingo scores higher on pricing value in Staquest's analysis. It is the highest-weighted dimension in this comparison.
LanguageTool is open source, and LanguageTool exposes a public API. The feature comparison and dimension scores above cover the full breakdown.
