An AI companion that remembers and organizes everything.
Talk to Cognitive OS the way you talk to ChatGPT or any other AI, about anything. We remember everything that matters and forget nothing. Cognitive OS is like an external hard drive for your brain. Everything you usually keep in your head, you can hand over. It remembers all of it and puts it in its place.
Free. Nothing to set up.
Enter to send · Shift+Enter for a new line
Just talk. You don't have to save anything.
Cognitive OS knows the difference between talking and something worth keeping. An ordinary conversation stays a conversation. Useful information becomes something you can find and use again.
- I've decided to launch my startup in October.🧠 Decision kept
- I prefer window seats.🧠 Fact about you kept
- Three restaurants I want to try in Tokyo: Narisawa, Den, Sushi Saito.📝 Kept in a note
- Let's talk through moving to Barcelona.💬 A topic begins
- What's the capital of Peru?· Just a conversation. Nothing to save.
You just chat. We put everything in its place.
No folders, notes, lists or tables to create. Cognitive OS works out what you actually said, what is worth keeping, and in what shape.
Notes
Information worth keeping, in a tidy note.
You say
“Restaurants in Tokyo I want to try: Narisawa, Den, Sushi Saito.”
It keeps
Restaurants in Tokyo
Travel / Tokyo · a list of three
Facts about you
Preferences, goals and decisions, kept apart so it can use them later.
You say
“I prefer direct flights.”
It keeps
Prefers direct flights
Preference
Topics
What we've been talking about for a while.
You say
“Let's think about moving to Barcelona…”
It keeps
Moving to Barcelona
14 messages · discussed today
Atomic pieces of knowledge
People, places, companies and projects, and how they connect.
You say
“Anna works at Acme.”
It keeps
Anna → works at → Acme
Person · Company
You don't have to remember what you said, or when.
Just ask. Cognitive OS finds it in your earlier conversations and shows where it came from.
Pick up where you left off.
Yesterday
Months later
Cognitive OS doesn't just remember the past. It lets you continue from where you stopped.
A lot like ChatGPT and Claude. With one important difference.
ChatGPT and Claude are excellent at talking, thinking things through and answering. Cognitive OS does that too — and it also keeps everything you talk about. In a convenient, structured form.
| Capability | ChatGPT / Claude | Cognitive OS |
|---|---|---|
| Talk with an AI | Yes | Yes |
| Ask anything | Yes | Yes |
| Help you think and decide | Yes | Yes |
| Remember important context | Partly | Yes |
| Create notes on its own | — | Yes |
| Structure notes on its own | — | Yes |
| Update notes on its own | — | Yes |
| Organize information | Limited | Yes |
| Remember which topics you discussed | Partly | Yes |
| Open separate chats for separate subjects, without losing the rest | Partly | Yes |
| Find what you said months ago | Limited | Yes |
| Connect people, places and information | Limited | Yes |
| Keep facts about you separately | Partly | Yes |
| Tasks and reminders | Partly | Soon |
ChatGPT and Claude are AI conversation.
Cognitive OS is AI conversation plus organizing the information that comes out of your head.
The AI creates notes by itself.
Cognitive OS gathers what matters into tidy notes. You never open an editor, invent a title or decide where it goes.
Travel / Tokyo
Restaurants in Tokyo
- Narisawa
- Den
- Sushi Saito
The AI structures notes by itself.
A list becomes a table as soon as its items get details. A note files itself into the right folder and gets its tags. You create neither the structure nor the folders.
Travel / Tokyo · #tokyo #restaurants
Restaurants in Tokyo
| Restaurant | Rating |
|---|---|
| Narisawa | 9/10 |
| Den | 8/10 |
| Sushi Saito | — |
Prose, list or table — it picks the shape. The folder and the tags too.
The AI keeps notes up to date by itself.
No need to open the note and edit it by hand. Say what to change, and Cognitive OS does it.
Before
Travel / Tokyo
Restaurants in Tokyo
| Restaurant | Rating |
|---|---|
| Narisawa | 9/10 |
| Den | 8/10 |
| Sushi Saito | — |
After
Travel / Tokyo
Restaurants in Tokyo
| Restaurant | Rating | Visited |
|---|---|---|
| Narisawa | 9/10 | — |
| Den | 8/10 | ✓ |
| Sushi Saito | — | — |
It doesn't just save notes. It keeps them up to date.
The AI remembers who you are.
Preferences, goals, decisions and other things about you are kept separately, so Cognitive OS can use them later, when they actually matter.
Later
Facts about you · In one list
Prefers direct flights and boutique hotels
Preferencefrom your message · today
You never have to repeat yourself.
Topics appear by themselves.
When you keep discussing one thing, Cognitive OS packs those messages into one big topic and keeps it. You can come back to any topic later.
Topics
What we have been talking about.
- Trip to Tokyolast discussed today
Five to seven days next month, boutique hotels and direct flights, Narisawa and Sushi Saito to try.
6 messagesContinue conversation → - Moving to Barcelonalast discussed yesterday
Neighbourhoods, rent, taxes, and whether it's this spring or next year.
14 messagesContinue conversation → - Pricing for Cognitive OSlast discussed 3 days ago
€19 a month first; a free month only if people come back after it.
9 messagesContinue conversation →
A topic is simply: here's what we've been talking about for a while.
Every topic can branch into its own conversation.
When one question deserves its own discussion, start a thread. It lives apart from the main chat, and everything you keep inside it stays available everywhere in Cognitive OS.
Every subject gets its own thread. We keep the main chat from turning into a mess of unrelated topics.
Threads
Focused branches of your chat. Each one grew out of a single message and keeps its own conversation.
Pricing
6 messages · todayYou: Let's think about pricing for Cognitive OS.
Which part of Barcelona
9 messages · yesterdayYou: If we do move to Barcelona, where would we actually live?
Investor intro through Anna
4 messages · 3 days agoYou: Anna might introduce me to an investor. How should I prepare?
In the chat, hover a message and choose Start thread.
Pricing
You wrote
Let's think about pricing for Cognitive OS.
Enter to send · Shift+Enter for a new line
Everything is connected.
People, places, companies, projects and information are linked to each other. Cognitive OS understands those links and can use them when you ask a question.
- Narisawa
- Den
- Sushi Saito
The Graph page shows how what you know fits together.
Tasks. Not just remembering. Helping you get them done.
Tell it what needs doing and Cognitive OS will keep the task. When it matters, it will remind you at the right moment.
- I need to call Anna tomorrow.✅ Task createdComing soon
- Remind me to check the documents on Friday.⏰ Reminder createdComing soon
First it keeps your thoughts. Then it helps you act on them.
Not available yet. Today it keeps what you said, but it will not remind you.
Bring in information however you like.
Type it. Say it out loud. Send a photo, a file or a link. Cognitive OS will learn to handle all of it the way it handles a normal conversation.
- Text
- Voice
- ImagesSoon
- FilesSoon
- LinksSoon
- Video linksSoon
YouTube, Instagram and Telegram posts
Send a link, and we take the useful part out of it and keep it: the recipe from a video, the place from a story, the idea from a post.
- YouTube
- Telegram posts
Text and voice messages work today. Images, files and links — including YouTube, Instagram and Telegram — are next.
How it works
Talk the way you would to ChatGPT — discuss anything. The AI works out what is worth keeping as a note, a fact, a topic or a connection, and keeps it.
01
Talk
Discuss anything, like you would with ChatGPT: plans, people, decisions, ideas — everything you usually keep in your head.
02
Cognitive OS does the rest
It works out what is worth keeping and turns it into notes, facts, topics and connections by itself.
03
Come back any time
A day, a month or a year later, just ask — and continue from where you stopped.
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 talk.
You
talk
- Cognitive OS
- 1understands
- 2keeps
- 3organizes
- 4connects
- 5updates
You
ask, and use it
This is what happens after a normal conversation.
You just talk. On the right, Cognitive OS has already gathered what you'll need later.
Enter to send · Shift+Enter for a new line
How many useful thoughts have you already lost?
- The idea you had in the shower.
- The restaurant someone recommended.
- The decision you made a month ago.
- The name of the person you need to contact.
- The plan you never wrote down.
None of it has to stay in your head.
Just hand it to Cognitive OS.
Questions
What is Cognitive OS?
An AI you can talk to about anything. Unlike an ordinary chat, it keeps the useful information from your conversations and organizes it by itself.
Do I have to create notes myself?
No. You just talk. Cognitive OS works out when something is worth keeping and creates the note, fact, topic or connection it needs.
What if I just want to talk?
Then nothing needs saving. Cognitive OS can tell an ordinary conversation from information that might be useful later.
Can I change something it already kept?
Yes. Just say what to change. For example: «Add Den to the restaurants I've visited». Cognitive OS updates the note itself.
What if I change my mind?
Anything it kept can be corrected or deleted.
Will it find something I said a long time ago?
Yes. Ask about an earlier conversation and you'll get an answer with a link to where it came from, if it was kept.
How is it different from ChatGPT and Claude?
It's an AI chat too. But Cognitive OS is built around what it knows about you: it keeps, organizes and connects what you tell it, so you can use it later.
Do I have to organize everything myself?
No. That's exactly its job.
Stop keeping everything in your head.
Just start talking. Cognitive OS works out what to keep and how to organize it.
Start with one conversation. Nothing to set up.