Grammarly vs Writesonic
Writesonic uniquely has 6 features · Grammarly uniquely has 2 features.
| Grammarly | Writesonic | |
|---|---|---|
| Company | ||
| Founded | 2009 | 2021 |
| HQ | San Francisco, USA | San Francisco, USA |
| AI model | Proprietary | GPT-4 and proprietary models |
| User base | 40 million+ | 10,000+ marketing teams |
| Platforms | Web, Windows, Mac, iOS, Android, Chrome, Safari, Firefox, Edge, MS Office, Google Docs | Web, Chrome Extension, API, WordPress |
| Languages | English primary, with fluency support for non-native English speakers | 50+ |
| Pricing | ||
| Free plan | Yes | No |
| Free trial | Yes — 7-day free trial for Pro | Yes — 7-day free trial, no credit card required |
| Starting price | $12/mo (Pro plan, billed annually) | $79/mo (Starter, billed annually) |
| Enterprise | Custom | Custom |
| All plans | Free$0/moPro$30/moEnterpriseContact Sales | Starter$99/moBasic$249/moGrowth$499/moEnterpriseCustom |
| Positioning | ||
| Best for | Individuals, teams, and enterprises seeking AI-powered writing assistance, grammar checking, and tone improvement | Marketing teams, SEO professionals, and agencies seeking AI-powered content creation and AI search visibility optimization |
| 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. | Writesonic uniquely combines AI search visibility tracking across 10 AI platforms with agentic content creation and citation-building workflows, closing the loop from gap identification to proven pipeline lift in one platform. |
| Competitors | Hemingway Editor, ProWritingAid, QuillBot, Jasper, Copy.ai, Writer | Semrush, Ahrefs, Surfer SEO, Jasper AI, Copy.ai, BrightEdge, Conductor |
| Features | ||
| AI Copywriting | ✓ | ✓ |
| AI Research | ✕ | ✓ |
| Brand Voice | Deep — brand tones (1 on Free, unlimited on Enterprise), style guide, knowledge share, snippets | Deep — up to 10 writing styles/brand voices on Growth, custom on Enterprise |
| Bulk Generation | ✕ | ✓ |
| Content Editor | ✓ | ✓ |
| Grammar Style | ✓ | — |
| Image Generation | ✕ | — |
| Long Form Writing | ✓ | ✓ |
| Paraphrasing | ✓ | ✓ |
| Plagiarism Checker | Built-in — available on Pro and Enterprise plans | — |
| SEO Optimization | ✕ | ✓ |
| Short Form Writing | ✓ | ✓ |
| Templates | ✕ | ✓ |
| Integrations | ||
| API Access | — | ✓ |
| Chrome Extension | ✓ | ✓ |
| CMS | — | WordPress |
| 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) | Google Analytics (GA4), Google Search Console, Looker Studio, Google Keyword Planner, WordPress, API, MCP |
| Wordpress | ✕ | ✓ |