Gemini Notebook vs Perplexity: curated sources or wider discovery

Use the current product

Google renamed NotebookLM to Gemini Notebook in July 2026. Older comparisons may describe a previous interface. Compare its current research workflow with Perplexity using the features actually available to you.

Define the evidence boundary

A curated notebook is useful when the relevant source collection is already known. Broader search is useful when finding the collection is part of the task. Test whether either workflow introduces unrelated, outdated or unsupported material.

Choose by the unanswered question

For an internal policy brief, source selection and version control may dominate. For an emerging industry topic, finding recent primary material may be the harder step. You can combine the approaches by discovering sources first and curating them for deeper reading. Evaluate the resulting answer against the originals. The choice is about how evidence reaches the assistant, not an assumption that either product guarantees correct interpretation.

Sources & notes

An editorial decision framework, not a scored benchmark or hands-on test.

blog.google — official reference

perplexity.ai — official reference

Sources reviewed for the September 2026 launch edition.