Audio Briefings
Every pile becomes a three-minute briefing you can hear on a walk. Pick a voice, press play, and the key ideas come to you.
3 min · 3 voices · 11 languages
Cortex · Your Second Brain
Your reading list is not a graveyard.It's just waiting to be heard.
Cortex turns tabs, PDFs, bookmarks and notes into 3-minute audio briefings, a living knowledge graph, and connections you would never have thought to look for.
Build my second brainMove your cursor. The network responds.
The problem
Information piles up. Understanding doesn't.
Forty open tabs, a bookmarks folder nobody opens, a downloads folder full of PDFs. Everything is saved and nothing is absorbed.
ScatteredConnected
Memory
Focus
Creativity
Tab
PDF
Note
Bookmark
Article
Tab
PDF
Article
Note
Bookmark
Tab
Bookmark
Note
Article
PDF
Core features
Three ways to finally use what you save.
Neural Knowledge Graph
Ideas become nodes and relationships become edges. Explore what you know the way your brain actually stores it.
Nodes · Edges · Clusters
Serendipity Engine
Cortex surfaces unexpected links between things you saved months apart, like the sleep paper that explains your focus problem.
Sleep research ↔ Deep work
Sleep & memory.pdf
Deep work notes
Interactive demo
Make a second brain in ten seconds.
Paste anything you have been meaning to read, or start from a sample. It all runs in your browser: no account, no API key.
Or start with a sample
- Reading your content
- Extracting ideas
- Connecting nodes
- Composing your briefing
Knowledge graph
9 concepts · 12 connectionsSelect a node to see how it connects.
Organized insights
Sleep
Sleep is not downtime for the brain.
Sleep · Learning
Poor sleep weakens attention, and weak attention makes new learning shallow.
Protecting · Sleep
Protecting sleep is therefore one of the cheapest ways to improve memory and focus.
Serendipity
“Learning” and “Researcher” keep showing up together. Worth a closer look.
Audio briefing
Narrated by Aria
0:000:20
No speech voices found on this device, so the briefing plays as a silent preview.
Meet the voices
Pick who reads to you.
Three narrators, three temperaments. Your choice changes how every briefing in the demo is spoken.
Voices use your device's built-in speech engine, so the exact sound varies by browser.
No speech voices found on this device, so the briefing plays as a silent preview.
Aria
Warm · CalmA gentle companion for evening reading and slow, careful ideas.
Orion
Deep · SteadyA low, even pace for dense material that needs your full attention.
Sage
Bright · BriskQuick and clear, for catching up on a stack of reading between meetings.
Global languages
Cortex speaks your language.
Click the globe or choose below. The whole interface switches instantly, script and typography included.
Current language · English
Hello, welcome to Cortex.
Stop collecting information.Start connecting ideas.
Your tabs have waited long enough. Give them a voice.