Koala AI vs LanguageTool
Koala AI uniquely has 6 features · LanguageTool uniquely has 2 features.
| Koala AI | LanguageTool | |
|---|---|---|
| Company | ||
| Founded | 2022 | 2003 |
| HQ | — | Potsdam, Germany |
| AI model | GPT-5, GPT-5.2, GPT-5 Mini, Claude 4.5 Sonnet | Proprietary |
| User base | 19,000+ paid users | 3M+ Chrome users |
| Platforms | Web | Web, Chrome, Firefox, Edge, Safari, Opera, macOS, Windows, Google Docs, Microsoft Word, Apple Pages, LibreOffice, Gmail, Outlook, Apple Mail, Thunderbird |
| Languages | 25+ | 30+ languages and dialects |
| Pricing | ||
| Free plan | Yes — 5,000 free words, no credit card required | Yes |
| Free trial | Yes — 5,000 free words on signup | — |
| Starting price | $9/mo (Essentials) | $4.99/mo (Premium, 2-year plan) |
| Enterprise | — | Custom — contact for Business/API |
| Refund policy | 15-day refund if fewer than 15,000 words and 100 messages used | — |
| All plans | Essentials$9/moProfessional$49/moBoost$99/moGrowth$179/moElite$350/moAdvanced$500/moScale I$750/moScale II$1,250/moScale III$2,000/mo | Premium$12.45/mo or $24.95/quarterlyTeams$5.53/mo |
| Positioning | ||
| Best for | SEOs, content creators, bloggers, and agencies needing publish-ready long-form articles at scale | Multilingual writers, non-native English speakers, professionals needing grammar and style checking across 30+ languages |
| Differentiator | Five-in-one SEO content platform combining Deep Research AI writing, real-time SERP analysis, automatic internal linking, AI image generation, and 1-click CMS publishing at the lowest price point in its class | Privacy-focused, GDPR-compliant AI grammar and style checker supporting 30+ languages with browser and office integrations, at a lower price point than Grammarly |
| Competitors | Jasper AI, Surfer SEO, Frase, Writesonic, SEO.ai, Article Forge | Grammarly, ProWritingAid, Hemingway Editor, Wordtune, Ginger |
| Features | ||
| AI Copywriting | ✓ | ✓ |
| AI Research | ✓ | ✕ |
| Brand Voice | Yes — 7 writing styles, 4 POVs, and custom tone of voice | Basic — Style Guide and Team Style Guide available in Premium/Teams |
| Bulk Generation | ✓ | ✕ |
| Content Editor | ✓ | ✓ |
| Grammar Style | ✓ | ✓ |
| Image Generation | Built-in — KoalaImages with multiple styles, premium models on Professional+, auto-embedded in articles | No |
| Long Form Writing | ✓ | ✓ |
| Paraphrasing | ✓ | ✓ |
| Plagiarism Checker | ✕ | ✕ |
| SEO Optimization | ✓ | ✕ |
| Short Form Writing | ✓ | ✓ |
| Templates | ✓ | ✕ |
| Integrations | ||
| API Access | ✓ | ✓ |
| Chrome Extension | — | ✓ |
| CMS | WordPress, Shopify, Webflow, Ghost | No |
| Google Docs | ✕ | ✓ |
| Key Integrations | WordPress, Shopify, Webflow, Ghost, Google Sheets, Zapier (via webhook), Make.com, Amazon (live product data) | Chrome, Firefox, Edge, Safari, Opera, Google Docs, Microsoft Word, Apple Pages, LibreOffice, Gmail, Outlook, Apple Mail, Thunderbird, macOS app, Windows app |
| Wordpress | ✓ | ✕ |
| Zapier | ✓ | — |