Cognitive OS · AI companion · 2026 · AI companion
An AI companion that remembers and organizes everything.
Talk as you would to ChatGPT. We keep everything that matters, shape it into beautiful notes — like in Notion or Obsidian — and keep them up to date for you.
- Talk as you would to ChatGPT
- We keep everything that matters
- And shape it into notes — like in Notion or Obsidian — and keep them up to date for you
01The main idea
So what's the point?
And why it is not one more GPT or notes app.
Notes in Notion or Apple Notes are hard to keep in order — current, tidy, each in its place. Sooner or later they fill up with a mess nobody wants to sort.
You want to type any old way or dictate voice notes — and have a kind of wizard assistant keep all the notes itself. Neatly and nicely.
As usual
- 37 notes called «Untitled»
- An idea — in a voice message nobody will replay
- A shopping list — in three places at once
- What you promised Sergey — long forgotten
With Cognitive OS
- One phrase — and the note is in its place
- A voice message — into neat text
- One list that updates itself
- Ask — and we find where it was
Cognitive OS
We took the best of ChatGPT, Notion and Obsidian, built a full AI companion and taught it to work with notes.
ChatGPT
A great conversation partner. Knows everything, tells everything. It keeps something, but what exactly is unclear. Lots of chats — and no handy notes.
Apple Notes · Notion
Nice and handy while you keep the notes by hand, carefully. The more notes, the harder they are to manage.
We joined the chat and the notes.
02.1Who it's for
For those whose thoughts are faster than their notes.
- Students
- Managers
- Founders
- Researchers
- Writers and bloggers
- Consultants
- Developers
- Teachers
- Parents
- Everyone who thinks a lot
It's for you if
- You have notes, but no order in them
- There's no time to word a thought carefully
- You can't be bothered to find which note has what
- You'd like to write any old way and get a beautiful note
02.2No need to be organized
You don't have to be an organized person at all.
No notes to create, no titles to invent, no sorting, no remembering where you wrote it down. Just tell it.
You say it any old way
so basically need to buy milk and call Sergey tomorrow, and also a startup idea — a notes app
by voice or text, no titles or folders
Cognitive OS — and you find it all in its place
- Buy milkHome › Shopping
- Call Sergey · tomorrowReminder
- Idea: a notes appWork › Ideas
03How it works
Just talk, we'll do the rest ourselves.
We made you an assistant that does not just replace ChatGPT but also manages your knowledge for you.
01
Just talk
Discuss anything, as with ChatGPT — by voice or text, as suits you.
02
Cognitive OS keeps it all
It understands what is worth keeping, makes a note and keeps it up to date for you.
03
Come back any time
A day or a year later — just ask, and we find where it was.
04What's inside
What's inside Cognitive OS.
Besides the chat — a whole system for your knowledge: notes, the graph, threads, topics, reminders. And all of it is set up through the chat, as if you were writing to your personal assistant.
Besides the chat — a whole system for your knowledge, set up through the chat, as if you were writing to your assistant.
Six modules01 / 06
05How it's different
How Cognitive OS differs from ChatGPT
ChatGPT answers questions and forgets. Cognitive OS answers just as well — and keeps everything for you.
| How it's different | ChatGPT | Cognitive OS |
|---|---|---|
| Answers to questions | Yes | |
| Analysis and problem solving | Yes | |
| Generating ideas | Yes | |
| Keeping information | Partly | |
| Managing notes | — | |
| Managing to-dos | — | |
| Managing reminders | Partly |
06Where it works
On all your devices.
One account — on every platform.
Mobile
iPhone, Android
Use it walking the dog, on the road, or with headphones on at the wheel.
Desktop
Mac, Windows
A full app for working at the computer. Keyboard control. Hotkeys. Commands.
07Pricing
Simple plans.
Try everything yourself — the first week is on us, no card needed.
Free
Everything included, no card
$07 days
- Chat, notes, topics, threads, graph
- Reminders
- All devices
- Recommended
Basic
For every day
$10a month
- Everything in Free
- No limit on notes
- Search through everything you said
Pro
When there are many notes
$15a month
- Everything in Basic
- Web search right in the chat
- Photos and files in notes
Prices when paid yearly. Everything you kept stays with you on any plan. Cancel in one click.
08Questions
Any questions left?
- What is Cognitive OS?
- An AI you can talk to about anything. It keeps what's useful from your conversations and organizes it by itself.
- Do I have to create notes myself?
- No. Imagine talking to ChatGPT and your personal assistant in one. Some notes we make for you; others we make when you ask.
- Can I change what it kept?
- Yes. Any note can be opened and edited by hand — there's a notes editor like Notion's, and Markdown works too.
- What if I just want to talk?
- Go ahead. Talk to Cognitive OS as you would to ChatGPT or any other conversational AI.
- Will you find what I said long ago?
- Yes. Ask us anything — we remember every conversation and know everything in your notes.
- How is it different from ChatGPT and Grok?
- ChatGPT, Grok and the like are great to talk to, but they don't organize your conversations and knowledge. We keep it all as a structured base of what you know.