Second brain AI for the documents you have read
Search+ works as a second brain for the documents you read, not for the thoughts you jot down. Everything you have read in PDF form goes into workspaces, and later you can ask what those documents said and get an answer that cites the passage. Nothing has to be tagged, linked or filed by hand first. If your problem is remembering where you read something, this covers it; if your problem is organizing your own notes, a note app is the better tool.
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Recall questions a document memory can answer
The kind of half-remembered questions that send people searching through old downloads.
Asked across a workspace of saved reports, the answer names the documents that discuss it and cites the passages, so the source you half remember turns up with its excerpt.
The answer quotes the relevant passage through its citation instead of paraphrasing from memory, which matters when the wording is the point.
Search+ looks across the workspace and cites any passage that cuts the other way, or says it found nothing in those documents.
Search your conversations by name and reopen the earlier thread, with its scope and context intact.
What is a second brain, and where AI fits
A second brain is an external system that holds what you want to remember so your own memory does not have to: notes, highlights, reading and the connections between them. Most second-brain systems are built around writing notes and linking them. AI second-brain tools add the ability to ask the system questions instead of browsing it. Search+ takes a narrower slice of the idea. It does not hold notes at all. It holds documents, organized into workspaces, and answers questions about them with citations, while keeping your past conversations so the thread of your thinking about a topic is saved too. For people whose reading lives in PDFs, that slice is often the part of a second brain that is hardest to maintain by hand.
How to build a document memory in Search+
- Decide how to split your reading
Make a workspace per area you return to, such as a client, a course or a research topic. Questions only draw on one workspace at a time, so the split decides what gets searched together.
- Move PDFs in as you read them
Upload PDFs in batches of up to 10. They process in the background and show their status, so filing does not interrupt your work.
- Tell each workspace what matters
Write Workspace Context for the area: the vocabulary you use, the sources you trust most, how you like answers framed.
- Ask when you need to remember
When something comes up, ask the workspace. Open the citation to read the original passage before you rely on it.
What Search+ remembers for you
Workspaces, documents and conversations are saved between sessions, so the memory is there next month.
Search+ finds relevant passages by meaning, not only by exact words, within the workspace you choose, which helps when you cannot recall the wording.
Answers carry inline citations to the source document and excerpt, and you can open each one.
Reopen earlier conversations from your history or search them by name.
Ask for themes and repeated claims across a set of documents.
Each account's workspaces and documents are kept separate from other accounts, and each workspace answers only from its own documents.
What it will not do as a second brain
There is nowhere to write notes, link them or tag them. Keep those in your note app.
Search+ does not connect to note apps, email, cloud drives or browsers. You add documents by uploading PDFs.
AI answers can be incomplete or inaccurate. Read the cited excerpt before you act on something you are recalling.
A folder of downloads versus a Search+ workspace
| When you need to | Folder of saved PDFs | Search+ |
|---|---|---|
| Find where you read something | Guess the file name, open several files | Ask the workspace and read the cited passage |
| Recall the exact wording | Search each file for words you half remember | Retrieval works by meaning, then cites the excerpt |
| Pick up an old line of thought | Start from scratch | Reopen the earlier conversation |
Second brain AI questions
Can Search+ work alongside Obsidian?
Is there a second brain AI app for my phone?
Can I try it without paying?
Will it remember things I tell it in chat?
What is the best way to start a document second brain?
Does it find things if I remember the idea but not the words?
How many documents can my second brain hold?
Can it connect what I read across different workspaces?
Is my reading private to my account?
Can my second brain hold more than PDFs?
Stop losing track of what you have read
Put your PDFs in a workspace and ask it the next time you need to remember.
Start a workspace