Decide
Side by side.
Two tools, side by side, on the same six pillars. The better number in each row is picked out for you.
NotebookLMGleanPerplexity
The verdict
Choose NotebookLM for studying document sets. Choose Glean for enterprise knowledge discovery. Choose Perplexity for market & competitive research.
Glean leads on security & compliance (+9), integrations & ecosystem (+14) and maturity & reliability (+10). Glean and Perplexity tie for the lead on capability (+2). NotebookLM leads on value for money (+5). Perplexity leads on momentum (+3). On the overall score it isn't close: Glean by 3.1.
| Criteria | NotebookLM | Glean Glean | Perplexity Perplexity AI |
|---|---|---|---|
| TIP Score | 83.2Excellent | 86.3ExcellentBest | 83.1Excellent |
| Capability30% | 85 | 87 | 87 |
| Value for Money15% | 90 | 74 | 85 |
| Security & Compliance15% | 84 | 93 | 76 |
| Integrations & Ecosystem15% | 74 | 92 | 78 |
| Maturity & Reliability10% | 76 | 88 | 78 |
| Momentum15% | 86 | 84 | 89 |
| Category | Search & Research | Search & Research | Search & Research |
| Pricing model | Freemium | Enterprise | Freemium |
| Starting price | Free / Plus $7.99 / Pro $19.99 (via Google AI plans) | Custom enterprise pricing | Free / $20 per month (Pro) |
| Maturity | Established | Mature | Established |
| Pricing transparency | Public tiers + free entry | Custom quotes only | Public tiers + free entry |
| Enterprise readiness | Mid-market ready | Enterprise-ready | Mid-market ready |
| Setup lift (est.) | Days to weeks | Weeks (vendor-led) | Days to weeks |
| Best for | Studying document sets | Enterprise knowledge discovery | Market & competitive research |
| Key risk | Per-notebook source limits constrain very large corpora | Enterprise-only pricing and rollout | Citation quality depends on underlying web sources |
Head to head
The comparisons people ask for most, already written up: verdict, all six pillars, pricing and the catch on each. Only tools that genuinely compete are paired.