Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. Vibe Shift records 614 monthly visits with +326.4% growth and Free Trial, Paid pricing.
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
Your tone dial for Slack messages
| Dimension / Metric | | |
|---|---|---|
| Official Domain | grammarly.com | vibeshift.app |
| Pricing Model | Freemium | Free Trial, Paid |
| Monthly Visits | 58.87M (58,867,412) | 614 (614) |
| MoM Traffic Delta | -916.08K (-1.5%) | +470 (+326.4%) |
| Primary Market & Share | 🇺🇸 United States (51.9%) | 🇧🇷 Brazil (100%) |
| Direct Visits / mo | 25.4M | 263 |
| 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.
Your tone dial for Slack messages
Rewrite any Slack message in professional, casual, friendly, concise, cheerful, or encouraging tone with a slash command.
Drop /reply in a channel and Vibe Shift reads recent conversation history to draft a context-aware reply automatically.
Set personal writing preferences that apply to every rewrite so the output consistently sounds like you.
Results appear in seconds inside Slack with no app switching or copy-pasting, on desktop and mobile across channels, DMs, and threads.
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
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.
Free AI paraphraser with seven rewriting modes
Free AI paraphraser with seven rewriting modes
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 AI humanizer that makes machine-written text read naturally
Free AI humanizer that makes machine-written text read naturally
Turn a few key points into polished, on-tone emails
Turn a few key points into polished, on-tone emails
