
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. Paperguide records 371,972 monthly visits with -2.9% growth and Freemium pricing.
AI-native workspace for literature reviews and auditable systematic reviews
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | grammarly.com | paperguide.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 58.87M (58,867,412) | 371.97K (371,972) |
| MoM Traffic Delta |
| -916.08K (-1.5%) |
| -11.05K (-2.9%) |
| Primary Market & Share | 🇺🇸 United States (51.9%) | 🇺🇸 United States (25.6%) |
|---|
| Direct Visits / mo | 25.4M | 121.59K |
|---|
| User Rating | 4.4 | 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.
AI-native workspace for literature reviews and auditable systematic reviews
Ask a research question in plain language and get a synthesized answer drawn from PubMed, arXiv, OpenAlex and Semantic Scholar, with every claim linked to its source paper.
Run PRISMA-style reviews with a predefined protocol, recorded screening decisions, dual independent reviewers and a conflict resolver, and a PRISMA diagram generated from your actual counts.
Import from Zotero or Mendeley, add papers by DOI, and get metadata and open-access PDFs fetched automatically, with annotations and notes that feed every other workflow.
Define custom extraction columns and have AI fill them across many papers, with each value linking back to the sentence it came from, exportable to CSV or Excel.

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-sourceA free, AI-powered academic search engine for 240M+ papers across every scientific field


SpecialistSuperior for quick evidence-based academic search, but less of a comprehensive writing and reference suite.


Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.

Offers robust PDF analysis and literature search workspaces, but lacks advanced systematic review screening workflows.
Stronger automated evidence synthesis and systematic review extraction, but less focused on end-to-end reference management.

Delivers deeper manuscript analysis and structural reports, but has a steeper learning curve than Grammarly.
Stronger AI academic writing and autocomplete assistance, but less comprehensive for systematic literature mapping.
SpecialistIndustry standard for systematic review screening and deduplication, but weaker on AI writing generation.
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
SpecialistExcellent smart citation analysis to verify if papers support or dispute claims, but narrower writing capabilities.
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-sourceA free, AI-powered academic search engine for 240M+ papers across every scientific field
SpecialistSuperior for quick evidence-based academic search, but less of a comprehensive writing and reference suite.
Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.
Offers robust PDF analysis and literature search workspaces, but lacks advanced systematic review screening workflows.
Stronger automated evidence synthesis and systematic review extraction, but less focused on end-to-end reference management.
Delivers deeper manuscript analysis and structural reports, but has a steeper learning curve than Grammarly.
Stronger AI academic writing and autocomplete assistance, but less comprehensive for systematic literature mapping.
SpecialistIndustry standard for systematic review screening and deduplication, but weaker on AI writing generation.
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
SpecialistExcellent smart citation analysis to verify if papers support or dispute claims, but narrower writing capabilities.