
SpecialistOutstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker.

Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. Secur3D records 135 monthly visits with -80.5% growth and Contact for Pricing pricing.

Detect unauthorized brand, IP and UGC content before it damages revenue
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | grammarly.com | secur3d.ai |
| Pricing Model | Freemium | Contact for Pricing |
| Monthly Visits | 58.87M (58,867,412) | 135 (135) |
| MoM Traffic Delta |
| -916.08K (-1.5%) |
| -556 (-80.5%) |
| Primary Market & Share | 🇺🇸 United States (51.9%) | 🇨🇦 Canada (100%) |
|---|
| Direct Visits / mo | 25.4M | 56 |
|---|
| User Rating | 4.4 | 4 |
|---|
| 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.

Detect unauthorized brand, IP and UGC content before it damages revenue
Analyzes uploads and published content to flag brand, intellectual property and digital asset risk, targeting the flood of AI-generated and AI-modified material that manual review cannot keep up with.
For marketplaces and platforms, evaluates content as it is uploaded so risky items can be caught before they go live rather than removed after complaints.
Helps studios and developers locate unauthorized copies, lookalikes and derivative works of their IP across marketplaces and UGC platforms.
Verifies signals around ownership and authenticity so brands and creators can substantiate claims about their original designs and digital assets.

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.
Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI detection and writing verification built for schools and editors

Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.
Free / Open-sourceDetect, humanize and verify AI content in one place

Enterprise AI and plagiarism detection for content integrity

Free / Open-sourceAI detector, plagiarism and content-quality checks in one scan

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

Free / Open-sourceMultilingual AI detector with sentence-level insight
SpecialistHighlights readability and sentence complexity visually, but lacks automated grammar correction and browser-wide extension support.
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.
Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI detection and writing verification built for schools and editors
Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.
Free / Open-sourceDetect, humanize and verify AI content in one place
Free / Open-sourceAI detector, plagiarism and content-quality checks in one scan
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
Free / Open-sourceMultilingual AI detector with sentence-level insight
SpecialistHighlights readability and sentence complexity visually, but lacks automated grammar correction and browser-wide extension support.