
Free / Open-sourceA free, AI-powered academic search engine for 240M+ papers across every scientific field
Free / Open-sourceA free, AI-powered academic search engine for 240M+ papers across every scientific field
Paperguide: Streamlines literature search and reference management, but does not provide an interactive visual citation graph. Connected Papers records 750,576 monthly visits with +3.1% 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 | connectedpapers.com | paperguide.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 750.58K (750,576) | 371.97K (371,972) |
| MoM Traffic Delta | +22.43K (+3.1%) | -11.05K (-2.9%) |
| Primary Market & Share | 🇺🇸 United States (17.6%) | 🇺🇸 United States (25.6%) |
| Direct Visits / mo | 308.44K | 121.59K |
| User Rating | 4.7 | 4.4 |
| Supported Platforms | Website | Website |
Explore the academic literature as a visual graph of related papers
Each graph places the seed paper among its most closely related works, clustered by how often papers are cited together or share references.
Separate perspectives show what a paper builds on and what later work builds on it, which is ideal for tracing a research lineage.
Start from a paper title, DOI, URL or proceedings link, so you can enter the graph from whatever you already have at hand.
A ranked list view lets you browse related publications by relevance when you need specifics rather than an overview.
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.

Free / Open-sourceA free, AI-powered academic search engine for 240M+ papers across every scientific field
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.
SpecialistSuperior for quick evidence-based academic search, but less of a comprehensive writing and reference suite.

Offers robust PDF analysis and literature search workspaces, but lacks advanced systematic review screening workflows.
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.
Stronger automated evidence synthesis and systematic review extraction, but less focused on end-to-end reference management.
Stronger AI academic writing and autocomplete assistance, but less comprehensive for systematic literature mapping.
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.
SpecialistIndustry standard for systematic review screening and deduplication, but weaker on AI writing generation.
SpecialistExcellent smart citation analysis to verify if papers support or dispute claims, but narrower writing capabilities.
SpecialistExcellent smart citation analysis to verify if papers support or dispute claims, but narrower writing capabilities.

Free / Open-sourceFree visual research discovery and literature mapping tool, but offers less automated evidence synthesis and writing.
Free / Open-sourceFree visual research discovery and literature mapping tool, but offers less automated evidence synthesis and writing.

Helps discover and track academic papers and trends, but offers less robust visual citation graph mapping.
Helps discover and track academic papers and trends, but offers less robust visual citation graph mapping.
SpecialistDelivers structured paper summaries and literature reviews, but lacks interactive visual citation exploration tools.
SpecialistDelivers structured paper summaries and literature reviews, but lacks interactive visual citation exploration tools.

Generates visual concept map clusters for broader research fields, but lacks granular paper-to-paper citation networks.
Generates visual concept map clusters for broader research fields, but lacks granular paper-to-paper citation networks.

SpecialistVisualizes text as topical knowledge graphs, but is designed for general text analysis rather than academic citation mapping.
SpecialistVisualizes text as topical knowledge graphs, but is designed for general text analysis rather than academic citation mapping.