Silestis vs NotebookLM
Both let you ask questions and get grounded answers. The difference is what they're built around.
Google NotebookLM is a research notebook: you add documents and sources, and it answers questions grounded in them. It's excellent when your knowledge already lives in files and notes.
Silestis is built around audio and video — especially web video and long recordings. Paste a supported link or start from a supported page with the browser extension, then work with transcripts, timestamped answers where available, speaker labels, and exports. If your knowledge lives in lectures, webinars, podcasts, and meetings rather than documents, that's the gap Silestis fills.
| Silestis | Google NotebookLM | |
|---|---|---|
| Built around | Audio & video | Documents & sources |
| Transcribe supported web videos (YouTube, many supported sites) | ||
| Browser extension (start from supported video pages) | ||
| Timestamped answers ([mm:ss] citations) | ||
| Long lectures, webinars & recordings | General sources | |
| Speaker diarization (who said what) | ||
| Export SRT / VTT / TXT / PDF / DOCX | Limited | |
| Languages | Broad; varies by mode | Multiple |
| Data storage | EU-configured | Google Cloud |
When to use which
- Choose Silestis for transcribing and searching web video, lectures, webinars, podcasts, and meetings — with timestamps and speaker labels.
- Choose NotebookLM for synthesizing across documents, PDFs, and notes you've already collected.
- Many people use both: Silestis to turn recordings into searchable, exportable transcripts — then those transcripts become sources anywhere you like.
See how Silestis works for lectures, YouTube videos, and podcasts, or check pricing.
Comparison based on publicly available information; competitor features may change over time.
NotebookLM — FAQ
Is Silestis a NotebookLM alternative?
For working with audio and video, yes. Both let you ask questions and get grounded answers, but Silestis is built specifically around video and audio — including supported web videos via a browser extension — and gives you timestamped answers where available, speaker labels, and rich export. NotebookLM is stronger as a general document/research notebook.
Can Silestis transcribe YouTube videos like NotebookLM?
Silestis transcribes YouTube and many other supported sites directly — paste a link or use the browser extension. It returns a full transcript with timestamps you can search and chat with, then export in multiple formats.
Which is better for lectures and webinars?
Silestis is purpose-built for long recordings like lectures and webinars: fast long-form transcription, timestamped answers where available, chapters, and flashcards for studying. NotebookLM works best once content is already in documents or supported sources.
Start from the supported lecture page you already use.
Open the video and click Silestis to start a transcript, summary, and notes workflow on the page. Timestamp-capable modes can also return cited answers, including when no source transcript exists.
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