Your second brain,
now it thinks with you
An Obsidian-style knowledge base where every note connects — and an AI assistant that actually knows what's in them.
Free to start · Bring your own AI key · Your notes stay yours
Why NoteLink
Everything you love about linked notes — plus a brain
Wiki-links & backlinks
Type [[ to connect ideas. See every note that points back, automatically.
AI that knows your notes
Ask questions and get answers grounded in your own writing — with sources.
Instant full-text search
Find anything across every note the moment you type it.
Markdown, your way
Write in plain Markdown with a live preview that matches what's stored.
Folders & tags
Organize loosely or tightly — however your brain actually works.
Your data, your key
Bring your own Claude or OpenAI key. We never train on your notes.
How it works
Up and running in three steps
Write & link
Capture notes in Markdown and connect them with [[wiki-links]].
Connect your AI
Add your own Claude or OpenAI key in settings — encrypted and private.
Ask anything
The assistant answers from your notes and drafts edits you approve.
Start building your second brain today
No credit card · Free to start