NotebookLM
Category: productivity
Pricing: Freemium — Free: 50 sources/notebook, 3 Audio Overviews/day, 50 daily queries (Gemini 2.5 Flash). Google One AI Premium $19.99/month (students $9.99/month): 5x usage, 300 sources, Gemini 3.1 Pro access.
Google's AI-powered research assistant that analyzes uploaded documents with source-grounded citations and generates podcast-style Audio Overviews. Now powered by Gemini 2.5 Flash (standard users) and Gemini 3.1 Pro (Pro/Ultra users).
Tags: research, document-analysis, podcast, audio-summary, google, citations, rag