NotebookLM vs Obsidian: which should I use?
NotebookLM is a cloud-based AI synthesis engine; Obsidian is a local-first Markdown PKM. NotebookLM wins for AI-grounded research; Obsidian wins for note ownership and longevity. Many users use both.
In more detail
NotebookLM: source-grounded AI research engine, cloud-based, generates audio overviews, scales to 300-1,500 sources per notebook with cited answers. Free with Google account. Obsidian: local-first PKM with plain Markdown files on your disk. Plugin ecosystem brings AI features. Best for users who prioritize ownership, longevity, and offline access. Most thoughtful workflows use both: NotebookLM for source-grounded synthesis on active projects, Obsidian for permanent personal notes and daily journaling. Notebook Toolkit captures sources to NotebookLM; the resulting insights flow back to Obsidian for long-term notes.
Get one-click capture for NotebookLM
Notebook Toolkit saves ChatGPT, Claude, YouTube, Reddit, and any web page to NotebookLM in one click. Free to install.
Install Notebook Toolkit