NotebookLM
Google's AI research notebook grounded in your own sources.
FreemiumAI Research
Perplexity
FeaturedAn answer engine that searches the web and cites its sources.
Overview
Perplexity answers questions by searching the web in real time and synthesizing results with inline citations. Follow-up questions keep context, and Spaces organize research threads and files.
Key features
01
Cited answers
Every answer links to its sources.
02
Deep Research
Multi-step research reports.
03
Spaces
Organize threads and files by topic.
Pros & cons
What's great
- Fast, sourced answers
- Great for research and discovery
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