WikiBrain vs NotebookLM
Both let you drop in sources and ask questions. The difference is what is left behind afterwards.
Choose Google NotebookLM if
You want quick Q&A and audio overviews over one batch of documents, are not building something that accumulates, and do not need agents like Cursor or Claude to read and write it.
Choose WikiBrain if
You want every source compiled into a linked, editable wiki page that compounds over time, and you want Cursor, Claude and ChatGPT to read and write the same knowledge base through MCP.
| Feature | Google NotebookLM | WikiBrain |
|---|---|---|
| Mechanism | Retrieval: each question re-reads the sources and cites passages | Compilation: the AI writes persistent wiki pages, an index and a log (Karpathy’s LLM Wiki) |
| What remains | The chat and notes; the sources stay as they were | Interlinked Markdown pages you can edit, version and export |
| Agent access | No public API or official MCP for the consumer version | Built-in MCP server: token or OAuth, for Cursor, Claude Code, Claude.ai and ChatGPT |
| Model | Gemini, included in the plan | Bring your own key (Anthropic, OpenAI, OpenRouter); model cost is separate; the first 10 trial runs need no key |
| Bibliography | Citations point to source passages | DOI/Crossref metadata, BibTeX/CSL import and export, [@citekey] citations, Zotero sync |
| Export | Whole-notebook Markdown export: not found | One-click zip, Obsidian-compatible |
| Price (personal) | Free 50 sources per notebook; Plus about US$4.99; Pro about US$19.99 | Free forever (200 notes, 20 agent runs a month); Pro US$6/month or 60/year |
| Open source | No | AGPL-3.0, self-hostable |
Trade-offs we admit
- NotebookLM’s Q&A and audio overviews are excellent; if that is all you need, it is less work.
- With WikiBrain you pay the model provider yourself (typically US$1–3 a month), an explicit trade-off.
- Prices and features are as published on the other product’s site; the check date is in the footer.
Start free (14-day Pro trial)Their facts checked on 2026-09-04 · Google NotebookLM Website