Grammarly vs Koala AI
Koala AI uniquely has 7 features · Grammarly uniquely has 2 features.
| Grammarly | Koala AI | |
|---|---|---|
| Company | ||
| Founded | 2009 | 2022 |
| HQ | San Francisco, USA | — |
| AI model | Proprietary | GPT-5, GPT-5.2, GPT-5 Mini, Claude 4.5 Sonnet |
| User base | 40 million+ | 19,000+ paid users |
| Platforms | Web, Windows, Mac, iOS, Android, Chrome, Safari, Firefox, Edge, MS Office, Google Docs | Web |
| Languages | English primary, with fluency support for non-native English speakers | 25+ |
| Pricing | ||
| Free plan | Yes | Yes — 5,000 free words, no credit card required |
| Free trial | Yes — 7-day free trial for Pro | Yes — 5,000 free words on signup |
| Starting price | $12/mo (Pro plan, billed annually) | $9/mo (Essentials) |
| Enterprise | Custom | — |
| Refund policy | — | 15-day refund if fewer than 15,000 words and 100 messages used |
| All plans | Free$0/moPro$30/moEnterpriseContact Sales | Essentials$9/moProfessional$49/moBoost$99/moGrowth$179/moElite$350/moAdvanced$500/moScale I$750/moScale II$1,250/moScale III$2,000/mo |
| Positioning | ||
| Best for | Individuals, teams, and enterprises seeking AI-powered writing assistance, grammar checking, and tone improvement | SEOs, content creators, bloggers, and agencies needing publish-ready long-form articles at scale |
| Differentiator | The most widely adopted AI writing assistant, trusted by 40 million users and 50,000 organizations, offering real-time grammar, tone, plagiarism, and AI detection with enterprise-grade security and style guide enforcement. | 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 |
| Competitors | Hemingway Editor, ProWritingAid, QuillBot, Jasper, Copy.ai, Writer | Jasper AI, Surfer SEO, Frase, Writesonic, SEO.ai, Article Forge |
| Features | ||
| AI Copywriting | ✓ | ✓ |
| AI Research | ✕ | ✓ |
| Brand Voice | Deep — brand tones (1 on Free, unlimited on Enterprise), style guide, knowledge share, snippets | Yes — 7 writing styles, 4 POVs, and custom tone of voice |
| Bulk Generation | ✕ | ✓ |
| Content Editor | ✓ | ✓ |
| Grammar Style | ✓ | ✓ |
| Image Generation | No | Built-in — KoalaImages with multiple styles, premium models on Professional+, auto-embedded in articles |
| Long Form Writing | ✓ | ✓ |
| Paraphrasing | ✓ | ✓ |
| Plagiarism Checker | Built-in — available on Pro and Enterprise plans | No |
| SEO Optimization | ✕ | ✓ |
| Short Form Writing | ✓ | ✓ |
| Templates | ✕ | ✓ |
| Integrations | ||
| API Access | — | ✓ |
| Chrome Extension | ✓ | — |
| CMS | — | WordPress, Shopify, Webflow, Ghost |
| Google Docs | ✓ | ✕ |
| Key Integrations | Google Docs, Microsoft Office (Word), Chrome, Safari, Firefox, Edge, Windows desktop app, Mac desktop app, iPhone, iPad, Android, Zendesk (shown in marketing) | WordPress, Shopify, Webflow, Ghost, Google Sheets, Zapier (via webhook), Make.com, Amazon (live product data) |
| Wordpress | ✕ | ✓ |
| Zapier | — | ✓ |