Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. PromptBase records 538,129 monthly visits with -1.8% growth and Paid pricing.
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
Buy a prompt that already works - or sell the ones you have perfected.
| Dimension / Metric | | |
|---|---|---|
| Official Domain | grammarly.com | promptbase.com |
| Pricing Model | Freemium | Paid |
| Monthly Visits | 58.87M (58,867,412) | 538.13K (538,129) |
| MoM Traffic Delta | -916.08K (-1.5%) | -9.85K (-1.8%) |
| Primary Market & Share | 🇺🇸 United States (51.9%) | 🇺🇸 United States (27.7%) |
| Direct Visits / mo | 25.4M | 256.49K |
| User Rating | 4.4 | 3.7 |
| 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.
Buy a prompt that already works - or sell the ones you have perfected.
Thousands of ready-to-use prompts organised by model and by output type, from illustration styles to marketing copy.
Listings are grouped by the model they were built for, so you can filter to the tool you actually use.
Each prompt is shown with example outputs, making it easy to judge the style before spending anything.
Anyone can upload prompts for sale and earn revenue share on every copy sold.
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.
Free / Open-sourceLargely free community-driven prompt sharing and instant chatting, rather than a transactional marketplace.
Free / Open-sourceLargely free community-driven prompt sharing and instant chatting, rather than a transactional marketplace.
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
SpecialistMassive free prompt search engine and discovery platform, but lacks PromptBase's direct creator monetization marketplace.
SpecialistMassive free prompt search engine and discovery platform, but lacks PromptBase's direct creator monetization marketplace.
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.
SpecialistDeeply specialized catalog for Midjourney styles and reference codes, but lacks multi-model text and video coverage.
SpecialistDeeply specialized catalog for Midjourney styles and reference codes, but lacks multi-model text and video coverage.
