What it is

Upload PDFs, docs, and links, and it answers with citations pointing back into those files. The constraint is the feature: it will not wander off into general knowledge, which makes it the one assistant you can trust on a closed corpus. The audio overview is a gimmick until the day you need to review a paper while walking.

Pricing

Free tier; higher limits with Google AI plans

Who it suits

A research notebook that only answers from the sources you give it. If the constraint above matches how you work, this is a safe default. If it does not, check the alternatives below before committing to a subscription.

Alternatives in Productivity

Notion AI — Search and drafting inside the wiki you already use.
Otter — Meeting notes that write themselves while you talk.
Gamma — Decks and documents that look designed without a designer.