You've saved thousands of good things — tweets, posts, articles — and you can't find any of them when you need them. Zihin turns that pile into something you can just ask.
You: what did I save about postgres indexing?
Zihin: You saved three threads on it. The main takeaway across them: reach for a partial index when you're filtering on a small, hot subset of rows, and watch for write amplification on high-churn tables.
Cited from: @thread on B-tree vs BRIN · a saved post on partial indexes · an article you bookmarked in March
A general chatbot answers from the whole internet and will happily make things up. Zihin answers only from what you saved, and shows you exactly which saves it used. So it's not guessing — it's handing back the thing you already found and forgot.
NotebookLM chats with documents you upload. Zihin chats with everything you already save across the web and social, automatically. Your reading and bookmarking becomes a personal knowledge base you can interrogate.
Start free — no credit cardFree forever tier · Answers cited from your own saves