by Google · founded 2023 · updated Jul 2026
NotebookLM turns your own sources, docs, PDFs, videos, links, into a grounded research assistant that only answers from what you give it. Audio Overviews generate podcast-style discussions of your material; a uniquely trustworthy way to study a corpus.
Fixed weights, sources attached, the formula
Every TIP Score is backed by verifiable claims. Data is a curated snapshot, always confirm current terms with the vendor.
| Claim | Source | As of |
|---|---|---|
| Video Overviews and Interactive Mode (pause to ask questions) shipped alongside EPUB support and Gemini-app sync | Google Labs / NotebookLM updates | May 2026 |
| Tiered as Free / Plus $7.99 / Pro $19.99 / Ultra, with Ultra split into $99.99 and $200 SKUs at I/O 2026 | Google I/O 2026 announcements | May 2026 |
| Audio Overviews available in 50+ languages; source-grounding cites exact passages for every answer | NotebookLM documentation | Apr 2026 |
NotebookLM's mid-2026 update shipped Video Overviews and an Interactive Mode that lets you pause an Audio Overview to ask questions, plus EPUB ingestion and two-way sync with the Gemini app. Pricing now spans Free / Plus $7.99 / Pro $19.99 / Ultra, with Ultra split into $99.99 and $200 SKUs.
Gemini 3.5 Pro headlines I/O 2026 with multimodal and reasoning gains, while 3.5 Flash becomes the default in the consumer app, sharpening Google's price-performance edge.
Google's grounded research assistant went global, and enterprises are adopting it for onboarding and knowledge-base digestion. Still no public API, watch this space.
Glean
Enterprise AI search and assistant across all your company's apps.
Perplexity AI
The AI answer engine with citations, Deep Research and a browser.