
A free, AI-powered academic search engine for 240M+ papers across every scientific field
A free, AI-powered academic search engine for 240M+ papers across every scientific field
Paperguide records 371,972 monthly visits with -2.9% month-over-month growth and Freemium pricing. Synthical: Science, Simplified records 0 monthly visits with 0% growth and Freemium pricing.

AI-simplified research discovery, one personalized feed for new science
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | paperguide.ai | synthical.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 371.97K (371,972) | 0 (0) |
| MoM Traffic Delta | -11.05K (-2.9%) | 0 (0%) |
| Primary Market & Share | 🇺🇸 United States (25.6%) | 🌐 Global (—) |
| Direct Visits / mo | 121.59K | 0 |
| User Rating | 4.4 | 4.1 |
| Supported Platforms | Website | Website |
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.

AI-simplified research discovery, one personalized feed for new science
Pulls in the newest papers from arXiv, bioRxiv, medRxiv, ChemRxiv and related sources so your feed is always current.
AI turns dense abstracts and papers into short, readable summaries and key-point overviews you can scan in seconds.
A personalized stream that learns from the topics, authors and fields you follow to surface relevant new work.
Organize research by subject area and interest so you can track the fields you actually care about.

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

AI academic search engine for peer-reviewed science

AI research platform for reading, understanding and writing scientific papers
AI research platform for reading, understanding and writing scientific papers
AI research assistant for evidence-based literature review and synthesis
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.

Map the literature around the papers you love—free
Map the literature around the papers you love—free
Explore the academic literature as a visual graph of related papers
Explore the academic literature as a visual graph of related papers

Screen thousands of papers down to the studies that matter
Screen thousands of papers down to the studies that matter
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