Citations
ChatDOC
Chat with any file and trace every answer to the page
AI research search with per-line citations across 200M+ sources
Mendeley
Academic reference manager (Elsevier)
NotebookLM
Source-grounded research notebook with podcast-style summaries
Perplexity AI
The answer engine that cites its sources on every live web query
Perplexity Pages
Turns Perplexity research threads into shareable, cited web pages
Perplexity Pro
$20/mo Perplexity tier: unlimited search + model choice.
Research Rabbit
Visual citation-network mapper for papers — still free, now has RR+.
Citation-grounded academic search from Seoul's Pluto Labs
Open-source AI search with citations — now has a $15/mo Pro tier
Scite
Citation index that flags support vs. contradiction, not just count
Semantic Scholar
Free AI-powered academic search across 236M+ papers, all fields.
Stanford's open-source tool that researches and drafts a cited report.
You.com
Web-grounded research and search APIs for developers and enterprises
Zotero
Open-source reference manager