Second brain software
Second brain software for the AI era.
AI changed the job of a second brain. Stash turns your notes, links, voice memos, files, and AI conversations into durable context every AI tool can use.
Free — no invite needed.
AI Context Layer
Captures become people, projects, topics, and context your AI tools can read.
The shift
AI changed what people mean by second brain.
The old promise was recall: save ideas so you could find them later. The new promise is leverage: let your tools start from what you have already seen, decided, tried, and learned.
People searching for a second brain now have an AI-context problem. Stash keeps the human part simple: capture anything worth keeping. It handles the structure underneath: people, projects, topics, relationships, wiki pages, semantic search, and AI access.
How Stash works
Capture first. Organization follows.
A second brain fails when maintaining it becomes the work. Stash is built around the opposite motion.
01
Capture
Text, voice, screenshots, links, emails, files, and AI threads all land in one place.
02
Understand
Stash extracts the people, projects, companies, topics, and relationships you mention.
03
Synthesize
Living wiki pages emerge from your captures, with source trails back to the original moments.
04
Connect
Claude, ChatGPT, Cursor, Codex, and other MCP clients can read from and write back to Stash.
Product shape
Your second brain becomes an operating layer.
Stash is not another place to manually file notes. It is the substrate your future work can query.
Voice memo
The Q3 planning thread connects to the pricing memo and the board deck...
Saved article
AI agents need long-lived context outside the chat session.
Claude conversation
Decision: position the product around context portability, not note-taking.
Topic
AI Context Portability
Stash identifies a recurring thesis across planning notes, AI conversations, and saved links: durable context should live outside any one model or chat product.
Sources
18
People
7
Projects
4
"The best AI changes. Your context should not."
Why it is different
Built for retrieval by you and by your tools.
Traditional second brain
- Manual folders, tags, databases, and backlinks.
- Useful when you remember where you put something.
- Usually trapped inside one app.
- AI context still gets copied and pasted by hand.
Stash
- Captures stay messy; Stash builds the structure.
- Search works by meaning, people, projects, and relationships.
- Wiki pages synthesize what you have accumulated.
- MCP lets AI tools read and write the same living context.
FAQ
Second brain questions, answered.
What is second brain software?
Second brain software is a personal knowledge system for capturing ideas, notes, references, and decisions so they can be found and reused later. Stash takes that idea further by making the knowledge usable by AI tools too.
Is Stash a notes app?
It can hold notes, but the center of gravity is broader: voice memos, screenshots, links, files, emails, and AI conversations. Stash turns all of that into a searchable, synthesized knowledge base.
Why does AI change second brain software?
AI makes stored knowledge active. A saved decision, meeting note, voice memo, or article is no longer just something you might personally search for later. It can become working context inside the AI session where you are writing, planning, deciding, or building.
How does Stash work with AI tools?
Stash exposes your context over MCP. That means supported clients can ask Stash what you have captured, use the results in the current conversation, and write new context back when you choose.
Do I have to maintain folders and tags?
No. Stash extracts structure from what you capture. You can still search and browse, but the organizing burden is not the main workflow.
Build a second brain your AI can actually use.
Start with one capture. Stash will handle the structure as your context grows.
Free — no invite needed.