Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. OpenCat records 5,083 monthly visits with -8.2% growth and Freemium, Free Trial pricing.
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
A native, fast AI chat client for Mac, iPad, and iPhone
| Dimension / Metric | | |
|---|---|---|
| Official Domain | grammarly.com | opencat.app |
| Pricing Model | Freemium | Freemium, Free Trial |
| Monthly Visits | 58.87M (58,867,412) | 5.08K (5,083) |
| MoM Traffic Delta | -916.08K (-1.5%) | -455 (-8.2%) |
| Primary Market & Share | 🇺🇸 United States (51.9%) | 🇺🇸 United States (74.2%) |
| Direct Visits / mo | 25.4M | 2.03K |
| User Rating | 4.4 | 4.6 |
| Supported Platforms | Website | Website |
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
Works natively inside Chrome, Safari, Firefox, Edge, Windows, Mac, Google Docs, MS Office, and mobile keyboards to flag grammar mistakes, rewrite tangled sentences, and shift tone toward confident, empathetic, or executive registers.
Deploys contextual AI agents that predict how a target audience will react to a draft, locate credible supporting citations, grade essays against rubric criteria, and generate drafts using up to 2,000 monthly prompts on Pro.
Scans text against billions of web pages and academic databases for accidental plagiarism, detects AI-generated passages, and logs transparent document provenance via Authorship reports in Google Docs and Word.
Enables teams on Pro and Enterprise plans to codify company terminology, ban deprecated jargon, enforce inclusive language, insert shared Snippets, and surface internal company definitions inline.
A native, fast AI chat client for Mac, iPad, and iPhone
The keyboard extension brings AI text generation into Messages, Notes, Mail, and any other app on your device, so you never have to switch contexts to ask a question.
Talk to your assistant hands-free and hear spoken replies, with Siri Shortcuts for triggering a chat without opening the app.
Switch between different AI models and providers for different tasks, and keep a curated prompt library ready for recurring needs.
Generate images from text prompts, discuss photos inside a conversation, and translate text between languages without leaving the chat.
OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistOutstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker.
SpecialistOutstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker.
Excels at heavy paraphrasing and text rewriting, but offers less seamless inline real-time proofreading across all apps.
Excels at heavy paraphrasing and text rewriting, but offers less seamless inline real-time proofreading across all apps.
SpecialistOne app to chat with GPT, Claude, Gemini and hundreds of other AI models
SpecialistOne app to chat with GPT, Claude, Gemini and hundreds of other AI models
Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.
Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.
All-in-one AI assistant across web, browser, desktop and mobile
All-in-one AI assistant across web, browser, desktop and mobile
Your AI agent for the browser: chat, automate and create from one sidebar
Your AI agent for the browser: chat, automate and create from one sidebar
Delivers deeper manuscript analysis and structural reports, but has a steeper learning curve than Grammarly.
Delivers deeper manuscript analysis and structural reports, but has a steeper learning curve than Grammarly.
One-click AI assistant for browsing, writing and research
One-click AI assistant for browsing, writing and research
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
SpecialistOne AI super app for chat, images, video and everyday document tasks
SpecialistOne AI super app for chat, images, video and everyday document tasks
SpecialistHighlights readability and sentence complexity visually, but lacks automated grammar correction and browser-wide extension support.
SpecialistHighlights readability and sentence complexity visually, but lacks automated grammar correction and browser-wide extension support.
