Glean vs NotebookLM
A detailed side-by-side comparison to help you choose the right AI productivity agent for your needs.
Best enterprise AI search across all company applications
Glean
Glean is an enterprise AI search and knowledge platform that indexes content across 100+ business applications and surfaces permission-aware results so employees can find and use company information w...
AI Models
Proprietary Glean retrieval modelsGPT-4oCustom enterprise search models
Key Features
- 100+ native connectors indexing all enterprise applications
- Permission-aware search respecting source system access controls
- Work AI synthesizes answers from multiple sources with citations
- People graph for expert and project ownership discovery
- Glean Agents for multi-step task completion across applications
Pricing
Business — Contact for pricing
Enterprise — Custom pricing
Pros
- 100+ connectors provide the broadest enterprise application coverage
- Permission-aware results prevent accidental information exposure
- Agents extend from search to action across connected applications
Cons
- Enterprise-only pricing with no self-serve option for smaller teams
- Full value requires connecting all company applications, which takes time
Best for AI-powered research and note-taking
NotebookLM
NotebookLM is Google's AI research and note-taking tool ranked #13 on the a16z Top 100 Gen AI Apps list, offering a unique approach to knowledge synthesis. Users upload source documents—PDFs, Google D...
AI Models
Gemini 2.5 ProCustom audio generation models
Key Features
- Source-grounded AI that only references uploaded materials
- Audio Overview generates podcast-style discussions from sources
- Inline citations for every AI-generated claim
- Support for PDFs, Docs, websites, YouTube, and audio uploads
- Up to 50 sources per notebook with 500K words each
Pricing
Free — $0/month
NotebookLM Plus — $19.99/month
Pros
- Source-grounded approach eliminates AI hallucination concerns
- Audio Overview podcast generation is genuinely innovative and useful
- Free tier provides substantial functionality for research
Cons
- Limited to uploaded sources—cannot access broader web knowledge
- Audio Overview generation can take several minutes for large sources