Free Plan: 50 AI Analyses Refilled Monthly

You Write the Claim. We Find the Proof.

From rough draft to citations you can verify in seconds. Instantly match against 30M+ biomedical papers.

TRACEABLE SOURCESSource links included for quick verification
Paste a paragraph from your thesis, a rough hypothesis, or a bold claim here...
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Integrated with leading academic databases

PubMedPubMed Central

Sentence-level retrieval powered in part by NCBI LitSense/LitSense2.

How LitSource works — in seconds

From a single question to citable evidence in just three steps. No complex search syntax needed.

AI-Powered Core Capabilities

Not just another search box. An AI engine that truly understands your claims. 30M+ papers, results in seconds.

Sentence-level Semantic Retrieval

Forget keyword guessing. Our AI engine truly understands your claim's semantics, pinpointing sentences and paragraphs with similar viewpoints across 30M+ papers—returning citable evidence in seconds, 100x faster than traditional search.

Evidence Tracing ¡ One-click to Source

Every result links directly to the original paper. AI auto-highlights key sentences supporting your claim with full context. One-click export to APA, MLA, EndNote formats—seamless from discovery to citation.

Smart Biomedical Entity Recognition

Deep learning NER models automatically identify and highlight genes, diseases, drugs, cell lines, and more. Real-time access to PubMed, CrossRef, Semantic Scholar—comprehensive biomedical coverage.

Multi-dimensional Precision Filtering

Search by Introduction, Methods, Results, Discussion sections. Combined with publication date and AI-powered ranking—weighing evidence strength, journal impact, and citation trends to surface the most relevant papers first.

Frequently Asked Questions

Real citations, real fast. Here's what you need to know.

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Join thousands of researchers who are finding citations faster and writing better papers.

LitSource - Find Citations in Seconds