✓
Tool
Category
Pricing
Free?
Updated
Google Scholar ✓
AI Research
Free
✓
Mar 2026
→
Free Google search engine for scholarly articles, theses, books, and patents worldwide.
Best for: research
ResearchRabbit ✓
AI Research
Free
✓
Mar 2026
→
Free personalized research paper discovery with visual networks and new paper alerts.
Best for: research
Semantic Scholar ✓
AI Research
Free
✓
Mar 2026
→
Free AI academic search with 200M+ papers, TLDR summaries, and citation graphs.
Best for: research
Unpaywall
AI Research
Free
✓
Mar 2026
→
Free browser extension that finds legal open access versions of paywalled papers.
Best for: open-access
Inciteful
AI Research
Free
✓
Mar 2026
→
Free citation network analysis tool for rapid literature review and paper discovery.
Best for: research
CORE
AI Research
Free
✓
Mar 2026
→
World's largest open access paper aggregator with 250M+ records and text mining API.
Best for: open-access
Kopernio
AI Research
Free
✓
Mar 2026
→
Clarivate browser extension for one-click PDF access to research papers via library links.
Best for: browser-extension