Built for founders with too many projects
Your best thinking happens in ChatGPT, Claude and Perplexity, then it scrolls away. Cortex turns those chats into one memory of everything you're building, and every answer links back to the exact line.
Free: 100 sources, no card. First answer in about 2 minutes.
Watch it remember
Paste a chat, watch the graph build, ask a question, click through to the exact line. The whole loop, in one take.
Plays silently as you scroll. Click it to watch with sound, from the start.
One answer, sourced from two different AIs.
Somewhere in your tabs
History search matches words, not meaning. And it never crosses apps.
Your AIs start every chat from zero. From now on, you don't.
Then try it live
One launch, worked out across a ChatGPT chat and a Claude chat. Cortex reads both, builds one graph, and answers with the lines to prove it. Anything you can paste lands in the same memory.
Sample project. Click a source under the answer to jump to the exact line.
The obvious question
It does. So does Claude. And each one stops at its own edge: none of them can answer what you decided, and why, with the line it came from.
How it works
From ChatGPT, Claude, Perplexity, anywhere. An email or a transcript works too. Capture takes ten seconds.
Decisions, people, commitments and facts go into one graph. No tags, no folders, no notes to write.
The answer comes back with the exact lines it came from.
Past chats
It starts with your chats. The same memory takes everything else, and every AI you use can read it back.
Web pages and Gmail threads, captured in a click.
Drop in docs, PDFs and call transcripts.
Slack, Outlook and Jira sync in on Pro.
Claude, Cursor and any MCP client read your memory back. New chats stop starting from zero.
Zero testimonials on this page, because I'm user number one. I tracked my own week: about 150 minutes a day lost re-finding context across four AI chats. That's why Cortex exists. It runs my projects daily.
From the maker. Building Cortex in the open.
Pricing
Questions are unlimited on every plan. We only meter what you put in: a source is one chat, one email, one doc.
Start your memory and feel it work.
For the builder running everything at once.
Founding price. Locks in for as long as you stay subscribed.
Free: 100 sources lifetime. Pro: 2,000 sources a month at the founding price. Cancel any time.
Questions
Yes, and it stops at ChatGPT's edge. It remembers preferences, it has never read your Claude or Perplexity chats, and you can't ask it what you decided in February, let alone get the source line. Cortex is one memory across every AI you use, every answer linked to its source, and it exports any time.
Paste them. Copy a chat from ChatGPT, Claude, Perplexity or anywhere else and paste it in: capture takes about ten seconds. The browser extension grabs web pages and Gmail threads, you can upload files and transcripts, and Pro adds Slack, Outlook and Jira connectors. We deliberately don't scrape chat apps with a brittle extension that breaks every UI update. Paste always works.
No. There are no tags, folders, or notes to write. You feed it raw threads and Cortex pulls out the decisions, people, commitments and facts on its own. The memory builds itself.
Every fact in your memory remembers which message, email, or document it came from. When Cortex answers, it shows the exact lines it pulled the answer from, so you can click through and verify.
Your memory is private to you. It is encrypted in transit and at rest, never sold, and never used to train a model. We process your data only to build and answer your memory, and you can export or delete everything whenever you want.
Free to start, no card needed: every beta account includes 100 sources to build your memory, with unlimited questions. Pro is $15 a month at the founding price (list is $25) for 2,000 sources a month, and your price stays locked for as long as you stay subscribed. You only pay to add more, never to ask more.
Your memory keeps answering everything you already added. You just can't add new sources until you upgrade. Nothing is lost while you decide.
Any time, in one click. Ask us to delete your data and it is gone for good.
Still have a question? We read every message.
Contact usFree to start, no card. Paste your first chat and ask in about 2 minutes.