S
Semantic Scholar
4.3
Free Allen AI's free academic search engine that uses AI to find relevant papers, surface key citations, and identify influential research. Features TLDR summaries and semantic search across 200M+ papers.
Key Features
- AI-powered paper search
- TLDR paper summaries
- Citation graph analysis
- Influential citation detection
- Research alerts and feeds
Pros
- + Completely free
- + Excellent citation analysis
- + TLDR summaries save time
Cons
- − Limited to academic papers
- − Some papers missing full text
academic search free citations TLDR Allen AI