NNScholar records 0 monthly visits with -100% month-over-month growth and Freemium pricing. Paperguide records 371,972 monthly visits with -2.9% growth and Freemium pricing.
AI research workspace for papers, evidence, and writing
AI-native workspace for literature reviews and auditable systematic reviews
| Dimension / Metric | | |
|---|---|---|
| Official Domain | nnscholar.com | paperguide.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 0 (0) | 371.97K (371,972) |
| MoM Traffic Delta | -1.54K (-100%) | -11.05K (-2.9%) |
| Primary Market & Share | 🌐 Global (—) | 🇺🇸 United States (25.6%) |
| Direct Visits / mo | 0 | 121.59K |
| User Rating | 4.6 | 4.4 |
| Supported Platforms | Website | Website |
AI research workspace for papers, evidence, and writing
Launch a literature review from a topic, DOI, PMID, arXiv ID, or research question, inspect titles and abstracts, and save the useful hits into a shared project library.
Chat with a PDF, translate it, annotate passages, and ask questions that stay scoped to the academic paper you are reading.
Connect claims, sources, decisions, and open questions in one board, then follow references and related work forward and backward from your seed literature.
Reusable agents and skills handle routine tasks such as screening, data extraction, synthesis, and source verification, which makes batch review work practical.
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.
SpecialistUnmatched visual literature discovery and graph mapping, but lacks document drafting and reference management features.
SpecialistUnmatched visual literature discovery and graph mapping, but lacks document drafting and reference management features.
AI-powered platform to read, write, and stay current with research
One AI agent for finding, reading and writing with real research
One AI agent for finding, reading and writing with real research
AI research workspace for searching, reading and connecting papers
AI research workspace for searching, reading and connecting papers
