KastorFlowAbout
NotebookLM, organized for real research.
KastorFlow began as the tool we needed ourselves: hundreds of sources across dozens of notebooks, no folders, no way to search across them, and AI chats and videos that never made it in. We built the missing parts, and we keep building.
Who makes it
Tandem Labs, an independent software studio. We use NotebookLM every day. Our guides are dated, and our statistics link every figure to its source.
What we promise
- Your notebooks stay in your own Google account. We don't sell or rent your data. Privacy policy
- AI features are off until you allow them. The text they send goes through our servers to Gemini without your name, email, account ID or IP address attached. We don't keep it, and Google doesn't use it to improve its products.
- It works from install. The Free plan is free, and no plan asks for an API key.
- Prices are stated plainly. Cancel anytime; your plan runs to the end of the period you paid for. Pricing
- We reply to support tickets within 2 business days.