Claude that knows you like an old friend.
Most AI meets you as a stranger every time. Preisach lets Claude remember how you think. How you weigh choices, when you rush, when you hold back. Every conversation picks up where the last one left off.
You'll lean on AI for bigger decisions. You deserve one that knows you, like an old friend who's been there all along.
You already ask it about your work, your money, your family. The answers are only as good as how well it knows you. Preisach gives Claude the one thing it's missing: you.
A stranger gives generic advice. An old friend gives advice that fits you.
- Every new chat starts from zero
- You re-explain who you are, again
- Advice fits the average person
- Tends to agree with whatever you say
- One getting-to-know-you conversation, once
- That understanding carries into every chat
- Advice that fits how you actually decide
- Speaks up when you're about to rush something you'd regret
Most AI tells you what you want to hear. An old friend knows your tricks.
AI has a well-known habit called sycophancy: it agrees with you, flatters your plan, and drifts along with your mood. Preisach gives Claude a steady read on how you really decide, so it can push back when you're talking yourself into something, the way a best friend looks out for you.
Pushes back, kindly
When you rush, rationalize or chase a quick yes, Claude has a reason to slow you down instead of cheering you on.
Notices drift
Ask Claude for a check-in anytime. It holds what you're doing now up against your profile and tells you if you seem off your usual course.
Stays on your side
It isn't there to judge you. It's there to keep you true to yourself, like a friend who's known you for years.
How it works
Built on the Preisach coupling framework, created by Daniel Preisach. It works inside the Claude you already use.
Connect it to Claude
Join, then add Preisach to your Claude account in a few clicks. We walk you through it.
Have one real conversation
Claude asks you a few thoughtful questions about how you make decisions. You do this once. Ever.
From then on, it knows you
Whenever you ask, Claude draws on what it learned, across all your conversations, not just one.
Built on proven science, not guesswork.
Preisach rests on the Preisach model of hysteresis: peer-reviewed mathematics used in physics and engineering since 1935 to describe how systems respond, hold and let go under pressure.
Daniel Preisach found a simple way to springboard from that math to something new: how people decide. Your profile is measured against that benchmark, so it's consistent, not a mood reading.
Read the research →Things to ask your old friend
Once you're set up, just talk to Claude the way you would to someone who knows you. A few to try:
Claude only looks at the conversations you choose to share. More capable Claude models tend to give a sharper, more detailed read.
Made for people who think things through with Claude.
If you already turn to Claude when something matters, Preisach makes every one of those conversations about you.
At a crossroads
A job offer, a move, a big purchase. Get a sounding board that knows how you decide best.
Founders and freelancers
You make dozens of calls a day. Claude learns when you're sharp and when you're rushing.
Always growing
If you journal, take personality quizzes or work with a coach, this is the piece that follows you into every chat.
Busy parents
So many decisions, so little time. A Claude that already knows how you weigh them saves both.
A good friend keeps your confidence.
We keep what helps Claude understand you, and nothing you said word for word.
Your words aren't stored
Your written answers are deleted as soon as your profile is made. Only a small set of numbers remains.
Nothing runs on its own
Preisach only works when you ask Claude to use it.
Pause anytime
Switch it off for one chat or for good, right in your Claude settings. It never changes Claude itself.
Come back anytime
Leave and return a year later, and Claude still knows you. Or ask us to delete everything.
First, do no harm.
A good friend never uses what they know about you against you. Neither will we.
We won't flatter you into a bad decision.
Preisach exists to push back, not to please.
We won't sell what we learn about you.
Not to advertisers, not to anyone.
We won't act without you.
Nothing runs unless you ask.
One price. One conversation. A lasting friendship.
Cancel anytime. Requires a Claude account; for adults 18 and over.
- Your one-time getting-to-know-you conversation
- Claude remembers you across every chat
- Step-by-step setup guide
- Pause or cancel anytime
Questions friends ask
Doesn't Claude already have memory?
Memory saves facts about you, like your job or your dog's name. Preisach is different: it captures how you make decisions, so Claude's advice fits the way you actually think.
Is $25 a month worth it?
It costs less than a single coaching session, and it's there every time you think something through with Claude, for as long as you're a member.
Is this creepy?
No. Your written answers are deleted after your profile is made, nothing runs unless you ask, and you can pause it in one click.
Do I have to keep taking the quiz?
Never. It's one conversation, once. After that, Claude simply knows you.
What do I need?
A Claude account, and you must be 18 or older. Setup takes a few minutes, and we walk you through it.
What if it isn't for me?
Cancel anytime with no contract and no fees. You only pay month to month, so trying it costs less than a dinner out.
I'm not technical. Can I set this up?
Yes. If you can copy and paste a link, you can set it up. We give you a step-by-step guide, and it takes about five minutes.
What happens to my profile if I cancel?
We keep it safe, so if you come back, Claude still knows you and you skip the interview. Or ask us and we'll delete everything.
Does it work with ChatGPT?
Preisach works with Claude today. Your profile is yours, like a passport, so we're built to bring it to other assistants as they support it.
Who is behind Preisach?
Preisach was created by Daniel Preisach. It's built on the Preisach model of hysteresis, peer-reviewed mathematics used in science and engineering since 1935.
Still thinking it over? That's exactly what Preisach is for.
Start for $25 a month