Lesson 1285 of 2116
AI Knowledge Base Platforms 2026: Glean vs. Notion AI vs. Custom RAG
When to buy an enterprise AI search product vs. build your own RAG.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The premise
- 2enterprise-search
- 3Glean
- 4Notion-AI
Concept cluster
Terms to connect while reading
Section 1
The premise
Building RAG well is harder than vendors admit; buying it limits how much you can tune retrieval — pick by your engineering capacity.
What AI does well here
- Index across SaaS sources (Slack, Drive, Confluence, GitHub) out of the box
- Provide answer attribution back to source documents
- Handle permissions inheritance from source systems
- Track query analytics by team
What AI cannot do
- Match a tuned in-house RAG on your specific domain accuracy
- Index your weirdest data sources without a custom connector
- Avoid the 'wrong answer with high confidence' problem entirely
Key terms in this lesson
End-of-lesson quiz
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