Features
AI-powered semantic search (meaning-based, not keyword-only)
Full-text article extraction with source citations
24 categories and 1,000+ sub-categories for filtering
Curated public and private collections
The Sleuth AI research assistant (Q&A with citations)
Today in History daily timeline
Search across 250 years of American newspapers (1730s–1960s)
6 million+ stories and growing
Ad-removed content display (AI removes ads)
Mobile-responsive web interface
Deep literature search reading hundreds of papers
Automatic citation trail following
Follow-up questions to refine search
Brainstorm research directions with AI
Generate custom tables from papers
Inline citations for traceable answers
Gauge paper relevance quickly
Sort and filter search results
Notifications for new relevant publications
Full-text analysis (Pro plan)
Collaborate on shared projects
Identify gaps in literature
Solve research bottlenecks (methods, datasets)
