NotebookLM
FreemiumAI research notebook by Google
Source-grounded AI answer... Document upload and organ...
Perplexity is an AI-powered search and answer engine that provides direct, cited answers to questions. Unlike traditional search engines, Perplexity synthesizes information from multiple sources and presents clear, conversational responses with source citations. It's designed for research, learning, and getting accurate information quickly.
Key Features
- Direct answers with source citations
- Real-time web search integration
- Follow-up question capability
- Focus modes for specific domains
- File upload and analysis
- Collections for organizing research
- Pro search for deeper research
- API access for developers
Use Cases
- Research and fact-checking
- Academic study and learning
- Market research and analysis
- Technical documentation lookup
- Current events and news
- Professional knowledge queries