They lock you in
Your ChatGPT conversations do not move to Claude. Switching models means starting from zero and losing years of built-up context
Your personal data is your capital for the future
Why we build MindDuck and what we think will happen to your conversations with AI in five years
WHAT IS WRONG?
Three years of conversations with different AIs. Where are they now?
Their memory is a black box
You cannot see what exactly they remembered or correct it, and much still has to be explained again in every new chat
You own nothing
Your history sits on the servers of the provider and lives by their rules (your chats are used to train models, get reviewed, and so on). For a lawyer, doctor, journalist, writer or founder that is a real problem - a reason not to use AI at all
They build a file on you
Your AI conversations are the most detailed file there is on you: work, health, money, relationships, plans. The company that stores them can build a profile from them and use it for its own purposes - for advertising, for example
Renting or saving
Models are becoming a commodity
A year from now there will be a model smarter than today's, and everyone will have it. But only the one you give your memory to will know what you are working on, what you have already tried and what you decided
TodayA few years from now
Models
- Get smarter and cheaper every few months
- Equally available to everyone
- Easily replace one another
Your memory
- Grows with every conversation
- Belongs only to you
- Makes any new model useful from the very first request
It already happened with hosting, storage and computing: what used to be an advantage became a line in a price list. The same is happening with models, only faster. Your context cannot be bought from anyone, it exists only with you. It is what remains an advantage
A subscription to a cloud assistant is like renting: you pay every month, and everything you discussed stays with the service, in its format and under its rules. In MindDuck every conversation goes into your base, like a deposit into your own account. The more you work, the more is saved there and the more precisely the assistant answers next time. Context works like compound interest: every answer builds on everything that came before it
In five years
What happens to your memory
What happens to your memory
TodayIn a yearIn five yearsCloud assistant
Cloud assistantSwitched models - started from zero
Cloud assistantThe service raised its price or shut down - pay more or lose your history
Cloud assistantYears of your conversations work for a corporation: for its models and its advertising. They do you almost no good
MindDuckMindDuckSwitch models even for a single question, your memory stays put
MindDuckPay for models directly, 1-2 cents per answer. And open models get smarter and cheaper every year
MindDuckWhen the AI right on your computer is smart enough, you switch off the cloud and lose nothing: it already knows everything you have discussed
When local AI is smart enough, you will be ready: your memory is already with you
Cloud assistants are ChatGPT, Claude, Gemini and similar services as they come. Comparison as of October 2026
Principles
What we believe
Models will become a commodity. The value is in your context
So MindDuck is tied to no model and does not make its own
Your memory is your property, not an asset of a provider
So we have no server with your data
Memory should be transparent: you can see what is in it
So every fact is shown with its source and date, and you can correct or delete it
You can leave at any time and take everything with you
So export to open formats was one of the first things we built
Programmers know: if you want to understand why your code does not work, explain it to the rubber duck on your desk
Our duck does not just listen - it remembers everything, answers and actually helps!
Why I built this
I built MindDuck for myself
I was tired of explaining to AI over and over what I am working on. And I did not want years of my conversations to live on someone else's servers. Models change every six months, but what I discussed with them should stay mine and keep working for me with any new model
MindDuck is in beta now. If you want an assistant like this too - let's finish it together!
Dmitriy Klein
Start keeping what matters today
Rent the model. Keep the memory