Whether you need evidence for a claim or want to check whether a reference is real, LitSource shows you one preview result first, then asks you to sign up only when you want the full workflow.
Integrated with leading academic databases
Sentence-level retrieval powered in part by NCBI LitSense/LitSense2.
From claim to evidence, from citation to verification — every reference is traceable and verifiable.
Not just another search box. An AI engine that truly understands your claims. 30M+ papers, results in seconds.
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.
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.
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.
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.
Instead of unverifiable testimonials, we show practical workflows, outcomes, and clear Pro upgrade triggers.
Best For: Graduate students / paper authors
Best For: Reviewers / PIs
Best For: Medical students / early-career researchers
Real citations, real fast. Here's what you need to know.
Can't find what you're looking for? Contact our support team
Built for people who already search in PubMed. The extension helps you shape queries, judge journal signal, and export promising results before switching to LitSource for evidence review and citation work.
Draft structured search syntax directly from the article or idea you are evaluating, without switching tabs.
Review JIF and quartile context while scanning results, so higher-signal papers rise to the top sooner.
Save promising query combinations and export paper lists when a quick scan turns into a real writing session.
Use the extension for in-browser scouting, then move the strongest leads back into LitSource for evidence review and citation export.
PubMed Search Assistant
Query + evidence workflow
Generate PubMed queries in place
Draft structured search syntax directly from the article or idea you are evaluating, without switching tabs.
Check journal quality faster
Review JIF and quartile context while scanning results, so higher-signal papers rise to the top sooner.
Export useful searches and papers
Save promising query combinations and export paper lists when a quick scan turns into a real writing session.
Search Query
Build and copy structured PubMed syntax without leaving the paper page.
Journal Signal
See JIF and quartile context before deciding what to read or export.
LitSource Sync
Move promising results back into LitSource for citation and evidence review.
Compare Free vs Pro on credits, export options, and verification power, then choose the plan that matches your workload.
