A NotebookLM alternative without the source cap
NotebookLM is great — until you hit the source limit or want a model other than Gemini. Silas chats with your entire document library using Claude, Gemini, GPT, or DeepSeek, and cites the exact page behind every answer.
Silas vs. NotebookLM
| Feature | Silas | NotebookLM |
|---|---|---|
| Sources per project | No per-project cap — ask across your whole library | Capped per notebook (50 sources on the free plan) |
| AI models | Claude, Gemini, GPT, and DeepSeek — switch mid-chat | Google Gemini only |
| Citations | Clickable citations to the exact file, page, and section | Inline citations to source passages |
| File sync | Google Drive and Microsoft 365 sync on paid plans | Google Drive, Docs, and Slides |
| Answer scope | Answers only from your documents; says “I don’t know” otherwise | Answers grounded in notebook sources |
NotebookLM details based on Google's public documentation and may change.
When Silas is the better fit
If your work lives in a handful of sources and you're happy with Gemini, NotebookLM does the job. Silas is built for the point where that stops being true: your library has grown past a notebook's limits, you want to compare answers from different models, or you need documents synced continuously from Google Drive or Microsoft 365 instead of added one by one.
The citation experience is the same idea taken further — every answer traces to the exact file, page, and section, and if the answer isn't in your documents, Silas says so. See how that works when you chat with a PDF or read about answers with verifiable citations.
Frequently asked questions
Why look for a NotebookLM alternative?
The most common reasons are the source cap (NotebookLM limits how many sources a notebook can hold — 50 on the free plan), being locked to Google’s Gemini models, and wanting document chat that lives alongside the rest of your files and integrations.
How does Silas handle more documents than NotebookLM?
Silas has no per-notebook source cap. You organize documents into folders and ask questions across hundreds of files at once — retrieval stays precise as the library grows because Silas indexes every document and pulls only the passages relevant to your question.
Which AI models does Silas support?
Claude, Gemini, GPT, and DeepSeek — and you can switch models mid-conversation. NotebookLM only uses Google’s Gemini models.
Does Silas cite sources like NotebookLM does?
Yes. Every answer cites the exact file, page, and section it came from, and citations are clickable so you can read the original passage in context.
Can I import my documents from Google Drive?
Yes. Paid plans connect Google Drive and Microsoft 365 so documents sync automatically, and you can also upload PDFs, Word documents, spreadsheets, and images directly.