NotebookLM

Free Tier Available

Google's personalized AI research assistant with viral audio overviews.

⚠️ Notice: Pricing, tier limits, and features change frequently. Data verified October 2026. Always confirm live terms on official websites.

Category	Assistants & LLMs
Paid (Pro) Plan Price	N/A (100% Free)
Basic Free Tier	✓ Available ($0 Free to start without credit card)
Developer API Support	✗ No direct public API