api4ai records 14,423 monthly visits with -32.7% month-over-month growth and Contact for Pricing pricing. Grammarly records 58,867,412 monthly visits with -1.5% growth and Freemium pricing.
Cloud-native computer vision APIs with one unified REST interface
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
| Dimension / Metric | | |
|---|---|---|
| Official Domain | api4.ai | grammarly.com |
| Pricing Model | Contact for Pricing | Freemium |
| Monthly Visits | 14.42K (14,423) | 58.87M (58,867,412) |
| MoM Traffic Delta | -7K (-32.7%) | -916.08K (-1.5%) |
| Primary Market & Share | 🇺🇸 United States (24.8%) | 🇺🇸 United States (51.9%) |
| Direct Visits / mo | 5.75K | 25.4M |
| User Rating | 4.3 | 4.4 |
| Supported Platforms | Website | Website |
Cloud-native computer vision APIs with one unified REST interface
An optimized endpoint that strips image backgrounds for product photos, car listings, collages and e-commerce catalogs, with natural shadow options.
Detect, analyze and recognize faces for identity, demographics or visitor analytics use cases.
Score images for not-safe-for-work sexual content so user-uploaded media can be filtered before it reaches your audience.
Recognize brand logos, detect and classify objects, label scenes, count furniture, apparel and other items in images.
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.
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.
Free / Open-sourcePrivate AI for unrestricted creative work
SpecialistAll-in-one creative AI toolkit for images, video, music and voice
SpecialistAll-in-one creative AI toolkit for images, video, music and voice
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.
SpecialistHuman-made icons, illustrations, photos and AI generation in one design library
SpecialistHuman-made icons, illustrations, photos and AI generation in one design library
SpecialistOne API for 1,000+ AI image, video, audio and 3D models
SpecialistOne API for 1,000+ AI image, video, audio and 3D models
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.
AI image and vector generation with art-directed, brand-consistent results.
AI image and vector generation with art-directed, brand-consistent results.
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.
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.
