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Free tier
NotebookLM
Free alternative to: ChatGPT Plus / Perplexity Pro (AI research assistants)
License: Proprietary (free plan)
Free terms: Free: up to 100 notebooks, 50 sources per notebook, 50 chat queries/day, 3 Audio Overviews/day. NotebookLM Plus (via Google One AI Premium, ~$19.99/mo) raises limits.
What it does
Google's AI research assistant that reads your uploaded sources and answers with citations — documents, audio, and video all become queryable knowledge bases.
Heads-up: Free-tier limits (100 notebooks / 50 sources / 50 chats per day / 3 Audio Overviews per day) are from a 2026 third-party roundup (Fast Company), NOT from official Google documentation captured during research — must recheck the official NotebookLM help/plus pages for a quotable line before publishing exact numbers. The free plan's existence and generosity are well documented; only the exact limits need official confirmation.
Get it
The project lives with its maintainers — we don't distribute it and we can't provide support for it.
Filed under: Free SEO & Marketing Tools
Last verified: September 17, 2026 · Official source ↗
Heads-up: licenses and free tiers change. This page summarizes what the project's official source published on the verified date — confirm the details on the official page before you build on it. We never invent pricing or limits.
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