Semantic Scholar records 8,198,672 monthly visits with +5.8% month-over-month growth and Free pricing. StreamDocs.ai (PDF.co) records 0 monthly visits with 0% growth and Freemium, Free Trial, Paid pricing.
A free, AI-powered academic search engine for 240M+ papers across every scientific field
Low-code REST API for PDF extraction, conversion, editing and AI invoice parsing
| Dimension / Metric | | |
|---|---|---|
| Official Domain | semanticscholar.org | pdf.co |
| Pricing Model | Free | Freemium, Free Trial, Paid |
| Monthly Visits | 8.2M (8,198,672) | 0 (0) |
| MoM Traffic Delta | +450.65K (+5.8%) | 0 (0%) |
| Primary Market & Share | 🇺🇸 United States (22.9%) | 🌐 Global (—) |
| Direct Visits / mo | 1.88M | 0 |
| User Rating | 4.8 | 4.4 |
| Supported Platforms | Website | Website |
A free, AI-powered academic search engine for 240M+ papers across every scientific field
Search 241 million-plus publications from every scientific field using natural-language queries that match meaning rather than exact keywords.
Each indexed paper gets a one-sentence machine-generated TLDR so you can triage results before committing to reading the full text.
An augmented PDF reader that highlights citations, definitions, equations and figures inline, and shows which later papers cited the passage you are reading.
See how a paper was cited, whether citations were influential, and which references shaped the work — useful for literature reviews and citation chasing.
Low-code REST API for PDF extraction, conversion, editing and AI invoice parsing
Pull structured data out of PDFs, scans and invoices via REST endpoints, or let AI invoice parsing return standardised JSON without any template.
Convert PDFs to Excel, CSV, XML, JSON, HTML and images, and run OCR on scanned documents to make them searchable and machine-readable.
Merge, split, fill forms, add watermarks, barcodes and stamps, and generate new PDFs programmatically from HTML or templates.
Official connectors for Zapier and Make expose the same API to no-code users, so document workflows can be automated without server-side code.
SpecialistBroader real-time web search capabilities with academic filters, but less specialized for deep bibliographic citation analysis than Semantic Scholar.
SpecialistBroader real-time web search capabilities with academic filters, but less specialized for deep bibliographic citation analysis than Semantic Scholar.
Synthesizes direct evidence-based answers from scientific papers, but has a less comprehensive raw database than Semantic Scholar.
Synthesizes direct evidence-based answers from scientific papers, but has a less comprehensive raw database than Semantic Scholar.
Offers an immersive AI reading and PDF analysis workspace, but is less focused on pure bibliographic search.
Offers an immersive AI reading and PDF analysis workspace, but is less focused on pure bibliographic search.
Excels at automated systematic review data extraction and evidence synthesis, but indexes a narrower slice of literature.
Excels at automated systematic review data extraction and evidence synthesis, but indexes a narrower slice of literature.
SpecialistProvides advanced Smart Citations showing how papers support or dispute each other, but has a smaller overall index.
SpecialistProvides advanced Smart Citations showing how papers support or dispute each other, but has a smaller overall index.
SpecialistFeatures excellent visual citation collections and literature tracking recommendations, but lacks inline paper summarization features.
SpecialistFeatures excellent visual citation collections and literature tracking recommendations, but lacks inline paper summarization features.
SpecialistOffers superior visual graph mapping of academic paper connections, but lacks traditional keyword search and full-text reading tools.
SpecialistOffers superior visual graph mapping of academic paper connections, but lacks traditional keyword search and full-text reading tools.
Chat with any PDF and get cited answers instantly
AI-native workspace for literature reviews and auditable systematic reviews
AI-native workspace for literature reviews and auditable systematic reviews
AI agents that run document-heavy business processes end to end
OCR and multi-modal document extraction APIs with built-in fraud detection
SpecialistAI-powered platform to read, write, and stay current with research
SpecialistAI-powered platform to read, write, and stay current with research
