Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. Rayo (Zero by Rayo) records 0 monthly visits with -100% growth and Contact for Pricing pricing.
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
Always-on AI assistant that runs your work on schedule
| Dimension / Metric | | |
|---|---|---|
| Official Domain | grammarly.com | rayo.work |
| Pricing Model | Freemium | Contact for Pricing |
| Monthly Visits | 58.87M (58,867,412) | 0 (0) |
| MoM Traffic Delta | -916.08K (-1.5%) | -1.64K (-100%) |
| Primary Market & Share | 🇺🇸 United States (51.9%) | 🌐 Global (—) |
| Direct Visits / mo | 25.4M | 0 |
| User Rating | 4.4 | 3.9 |
| 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.
Always-on AI assistant that runs your work on schedule
Zero runs tasks on triggers and time schedules — for example, reading new leads every morning at 9am and emailing a summary.
The assistant chains actions such as reading an inbox, identifying leads, drafting an email, and sending it, rather than producing a single answer.
When an action is ambiguous, Zero pauses and asks before doing something irreversible, such as emailing a specific contact.
Rayo markets frictionless access to capable frontier models as part of the assistant's core value.
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.
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.
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.
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
Free / Open-sourceAI agents that run recurring business work for your team
Free / Open-sourceAI agents that run recurring business work for your team
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.
Great for sentence-level tone adjustments and rewriting, but less comprehensive for standalone grammar rules and style guides.
Great for sentence-level tone adjustments and rewriting, but less comprehensive for standalone grammar rules and style guides.
AI writing assistant with autocomplete, research, and a Chrome extension
AI writing assistant with autocomplete, research, and a Chrome extension
Offers similar inline grammar correction and snippets, but with a smaller ecosystem of browser extensions and integrations.
Offers similar inline grammar correction and snippets, but with a smaller ecosystem of browser extensions and integrations.
Free / Open-sourceThe AI SEO agent that researches, writes, publishes, and builds links for you
Free / Open-sourceThe AI SEO agent that researches, writes, publishes, and builds links for you
Free / Open-sourceAI SEO agents that rank on Google and get cited by AI chatbots
Free / Open-sourceAI SEO agents that rank on Google and get cited by AI chatbots
