NotebookLM
Grounded research notebook with audio and video overviews.
Full NotebookLM record →Head to head
NotebookLM vs Glean
NotebookLM (Google) and Glean (Glean) both sit in Search & Research. NotebookLM is the cheaper entry point at Free, Pro via Google AI Plus. Glean shipped more tracked changes in the last 30 days (5 vs 0). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | NotebookLM | Glean Glean |
|---|---|---|
| Segment | Search & Research | Search & Research |
| Version | 2025 | October Drop 2026 |
| Entry cost | Free, Pro via Google AI Plus | from $100/mo |
| Pricing tiers | — | Enterprise free |
| Model stack | Gemini 3 | 40+ Unique LLMs ( · auto routing · Claude · growing!) · Jev · Model hub (supports 40+ LLMs) · OpenAI Models |
| Context window | — | Model-dependent |
| Public API | ||
| Routes models | ||
| Changes / 30d | 0 | 5 |
| Origin | Global | Global |
| Capabilities | Source grounding, Audio overviews, Mind maps | Permissions-aware search, Knowledge graph, Glean Agents, 100+ connectors, Assistant, Enterprise Search, Glean Assistant, Agent Builder |
Glean
Glean indexes SaaS, docs and chat with permissions-aware retrieval, then layers assistants and agents on the resulting knowledge graph.
Full Glean record →